`libgccjit.so` internal error when using `antoyo/gcc` and most recent commit

[cr1901]

Problem

With a freshly-compiled libgccjit.so and following the instructions in the Building section of the README.md, my rustc gets stuck at building the sysroot with the following error (invoked with cargo build -v):

william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc$ ./test.sh --release
    Finished release [optimized] target(s) in 0.03s
[BUILD] mini_core
[BUILD] example
[AOT] mini_core_hello_world
./target/out/mini_core_hello_world
abc
bcd
Hello printf
Hello
World!
abc
Boxed outer got dropped!
Inner got dropped!
Inner got dropped!
Inner got dropped!
TLS works!

[BUILD] sysroot
    Updating crates.io index
   Compiling core v0.0.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/core)
       Fresh cc v1.0.68
       Fresh autocfg v1.0.1
   Compiling compiler_builtins v0.1.45
     Running `rustc --crate-name core --edition=2018 sysroot_src/library/core/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=e063c7bddda6fe07 -C extra-filename=-e063c7bddda6fe07 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling libc v0.2.97
     Running `/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/build/compiler_builtins-2759047e8e5760ee/build-script-build`
     Running `/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/build/libc-7e3dc487b4357978/build-script-build`
   Compiling unwind v0.0.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/unwind)
   Compiling miniz_oxide v0.4.4
   Compiling std v0.0.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/std)
     Running `/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/build/unwind-610dfb8f39c4878a/build-script-build`
     Running `/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/build/miniz_oxide-713c8c4c6d9b1cdb/build-script-build`
     Running `/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/build/std-1e5d80d9271fccf3/build-script-build`
   Compiling rustc-std-workspace-core v1.99.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/rustc-std-workspace-core)
     Running `rustc --crate-name rustc_std_workspace_core --edition=2018 sysroot_src/library/rustc-std-workspace-core/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=59ed975568390d45 -C extra-filename=-59ed975568390d45 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcore-e063c7bddda6fe07.rmeta -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
     Running `rustc --crate-name compiler_builtins /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.45/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="compiler-builtins"' --cfg 'feature="core"' --cfg 'feature="default"' --cfg 'feature="rustc-dep-of-std"' -C metadata=17b0aa9941b1c5cf -C extra-filename=-17b0aa9941b1c5cf --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg 'feature="unstable"'`
libgccjit.so: error: type mismatch in binary expression
unsigned long

signed int

signed int

_21 = _16 & _20;
libgccjit.so: error: type mismatch in binary expression
unsigned long

signed int

unsigned long

_22 = _13 + _21;
libgccjit.so: error: ‘verify_gimple’ failed
0x7f9a3eadceb4 verify_gimple_in_seq(gimple*)
        ../../../gcc/gcc/tree-cfg.c:5161
0x7f9a3e7c2aa5 gimplify_body(tree_node*, bool)
        ../../../gcc/gcc/gimplify.c:15383
0x7f9a3e7c2c1c gimplify_function_tree(tree_node*)
        ../../../gcc/gcc/gimplify.c:15454
0x7f9a3e541e8e gcc::jit::playback::function::postprocess()
        ../../../gcc/gcc/jit/jit-playback.c:1727
0x7f9a3e542b5e gcc::jit::playback::context::replay()
        ../../../gcc/gcc/jit/jit-playback.c:3063
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
error: could not compile `compiler_builtins`

Caused by:
  process didn't exit successfully: `rustc --crate-name compiler_builtins /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.45/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="compiler-builtins"' --cfg 'feature="core"' --cfg 'feature="default"' --cfg 'feature="rustc-dep-of-std"' -C metadata=17b0aa9941b1c5cf -C extra-filename=-17b0aa9941b1c5cf --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg 'feature="unstable"'` (exit status: 4)
warning: build failed, waiting for other jobs to finish...
libgccjit.so: error: type mismatch in binary expression
unsigned long

signed int

signed int

_34 = _28 & _33;
libgccjit.so: error: type mismatch in binary expression
unsigned long

signed int

unsigned long

_35 = _24 + _34;
libgccjit.so: error: ‘verify_gimple’ failed
0x7f646f068eb4 verify_gimple_in_seq(gimple*)
        ../../../gcc/gcc/tree-cfg.c:5161
0x7f646ed4eaa5 gimplify_body(tree_node*, bool)
        ../../../gcc/gcc/gimplify.c:15383
0x7f646ed4ec1c gimplify_function_tree(tree_node*)
        ../../../gcc/gcc/gimplify.c:15454
0x7f646eacde8e gcc::jit::playback::function::postprocess()
        ../../../gcc/gcc/jit/jit-playback.c:1727
0x7f646eaceb5e gcc::jit::playback::context::replay()
        ../../../gcc/gcc/jit/jit-playback.c:3063
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
error: build failed

real    0m11.133s
user    0m12.593s
sys     0m0.514s

Debugger Info

Unfortunately, running gdb doesn't give me any useful information; loc is a NULL pointer by the time we reach add_error:

william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc$ LD_LIBRARY_PATH=$(cat gcc_path) gdb --args rustc --crate-name compiler_builtins /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.45/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="compiler-builtins"' --cfg 'feature="core"' --cfg 'feature="default"' --cfg 'feature="rustc-dep-of-std"' -C metadata=17b0aa9941b1c5cf -C extra-filename=-17b0aa9941b1c5cf --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg 'feature="unstable"'
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from rustc...
(gdb) b add_error
Function "add_error" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (add_error) pending.
(gdb) c
The program is not being run.
(gdb) r
Starting program: /home/william/.cargo/bin/rustc --crate-name compiler_builtins /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.45/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg feature=\"compiler-builtins\" --cfg feature=\"core\" --cfg feature=\"default\" --cfg feature=\"rustc-dep-of-std\" -C metadata=17b0aa9941b1c5cf -C extra-filename=-17b0aa9941b1c5cf --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg feature=\"unstable\"
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
process 517958 is executing new program: /home/william/.rustup/toolchains/nightly-2021-06-14-x86_64-unknown-linux-gnu/bin/rustc
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffee3ff700 (LWP 517962)]
{"artifact":"/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/compiler_builtins-17b0aa9941b1c5cf.d","emit":"dep-info"}
{"artifact":"/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta","emit":"metadata"}
[New Thread 0x7fffe678a700 (LWP 517963)]
[New Thread 0x7fffe6589700 (LWP 517964)]
[New Thread 0x7fffe59ff700 (LWP 517965)]
[New Thread 0x7fffe4a8f700 (LWP 517966)]
[New Thread 0x7fffe3fff700 (LWP 517967)]
[New Thread 0x7fffe37ff700 (LWP 517968)]
[New Thread 0x7fffe25ff700 (LWP 517969)]
[New Thread 0x7fffe1dff700 (LWP 517970)]
[New Thread 0x7fffe15ff700 (LWP 517971)]
[New Thread 0x7fffe0b7f700 (LWP 517972)]
[New Thread 0x7fffe03ff700 (LWP 517973)]
[New Thread 0x7fffdfbff700 (LWP 517974)]
[New Thread 0x7fffdf3ff700 (LWP 517975)]
[New Thread 0x7fffdebff700 (LWP 517976)]
[New Thread 0x7fffde1ff700 (LWP 517977)]
[New Thread 0x7fffdd9ff700 (LWP 517978)]
[New Thread 0x7fffdd1ff700 (LWP 517979)]
[New Thread 0x7fffdc9ff700 (LWP 517980)]
[Detaching after vfork from child process 517981]
[Thread 0x7fffe59ff700 (LWP 517965) exited]
[Detaching after vfork from child process 517982]
[Thread 0x7fffe4a8f700 (LWP 517966) exited]
--Type <RET> for more, q to quit, c to continue without paging--
[Switching to Thread 0x7fffe3fff700 (LWP 517967)]

Thread 7 "opt compiler_bu" hit Breakpoint 1, gcc::jit::recording::context::add_error (
    this=0x7fffe8886300, loc=0x0, fmt=fmt@entry=0x7fffecbf822d "%s")
    at ../../../gcc/gcc/jit/jit-recording.c:1457
1457    {
(gdb) p loc->m_line
Cannot access memory at address 0x28
(gdb) p loc
$1 = (gcc::jit::recording::location *) 0x0
(gdb) p loc->m_line
Cannot access memory at address 0x28
(gdb)

I am unsure how to proceed, so opening this issue to see whether I found an actual bug, or I'm doing something wrong.

Additional Info

One thing I noticed... despite me passing --release to test.sh, the cargo command actually invoked in build_sysroot.sh is the debug invocation (I have added -v):

    sysroot_channel='debug'
    cargo build -v --target $TARGET_TRIPLE

System Information

OS:

william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc$ uname -a
Linux xubuntu-dtrain 5.4.0-73-generic #82-Ubuntu SMP Wed Apr 14 17:39:42 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

GCC version:

william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.3.0-17ubuntu1~20.04' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-9-HskZEa/gcc-9-9.3.0/debian/tmp-nvptx/usr,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)
william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc$

libgccjit configure invocation:

../../gcc/configure --prefix=/usr --enable-languages=jit,c++ --disable-multilib --disable-bootstrap --enable-host-shared --enable-checking=release

gcc-path contents:

/home/william/Projects/toolchains/build-gcc-toolchain/destdir-libgccjit/usr/lib

rustc version (matches expected):

william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc$ rustc -V
rustc 1.55.0-nightly (f586d79d1 2021-06-13)

[antoyo]

That sounds like a bug to me!

If you want to help debug further, you can uncomment these lines.
This will set fake debug information that points to C files that will be written to disk so that you can see something else than NULL for loc.

I do not use --disable-multilib when configuring libgccjit, but I'll try to see if I can reproduce this issue.

Have you tried without the --release flag? (I remember seeing some issues with this flag, so I'll try this as well to see if I can reproduce.)

One thing I noticed... despite me passing --release to test.sh, the cargo command actually invoked in build_sysroot.sh is the debug invocation (I have added -v):

It seems indeed that I'm not passing the --release argument to this script. Thanks for spotting this!

Thanks!

[cr1901]

Here is a dumps.zip hot off the presses :)!

I do not use --disable-multilib when configuring libgccjit, but I'll try to see if I can reproduce this issue.

According to CI for gcc you do pass --disable-multilib. However, I have to pass it on my system for the time being, as I don't have 32-bit libraries at present on my Ubuntu machine.

Have you tried without the --release flag? (I remember seeing some issues with this flag, so I'll try this as well to see if I can reproduce.)

Same issue without the --release flag. If I pass the --release flag to build_sysroot.sh, then we get a different error a bit further into the build. But one issue at a time :D! In truth, I was trying to figure out the minimal invocation that would get me a working libgccjit. I think the targets all-gcc and install-gcc should in theory work, as well as --enable-languages=jit alone. But that will need to wait for now.

It seems indeed that I'm not passing the --release argument to this script. Thanks for spotting this!

The above dumps were created with me passing the --release flag, but without passing the flag to build_sysroot.sh.

Thanks!

There are some gcc-only archs that I want to try Rust on (lm32, sh2), so I have a somewhat-vested interest to follow this project's progress :). That way, when cross-compilation starts working, I can start testing immediately.

[antoyo]

Thanks. I'll look at this!

If you want to try building the sysroot in release mode, you'll have to add -C lto=off in build_sysroot.sh on the cargo build --release line (that seems to fail afterwards, though). I'll look into this issue as well.

[antoyo]

Can you please tell me what's the location information you now have in gdb?
That should point to one of those files in your dump.

[cr1901]

Here is the entire gdb dump; the file appears to be compiler_builtins.1shhbuin-cgu.1.c.

william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc$ LD_LIBRARY_PATH=$(cat gcc_path) gdb --args rustc --crate-name compiler_builtins /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.45/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="compiler-builtins"' --cfg 'feature="core"' --cfg 'feature="default"' --cfg 'feature="rustc-dep-of-std"' -C metadata=17b0aa9941b1c5cf -C extra-filename=-17b0aa9941b1c5cf --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg 'feature="unstable"'
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from rustc...
(gdb) r
Starting program: /home/william/.cargo/bin/rustc --crate-name compiler_builtins /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.45/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg feature=\"compiler-builtins\" --cfg feature=\"core\" --cfg feature=\"default\" --cfg feature=\"rustc-dep-of-std\" -C metadata=17b0aa9941b1c5cf -C extra-filename=-17b0aa9941b1c5cf --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg feature=\"unstable\"
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
process 519806 is executing new program: /home/william/.rustup/toolchains/nightly-2021-06-14-x86_64-unknown-linux-gnu/bin/rustc
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffee3ff700 (LWP 519810)]
{"artifact":"/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/compiler_builtins-17b0aa9941b1c5cf.d","emit":"dep-info"}
{"artifact":"/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta","emit":"metadata"}
[New Thread 0x7fffe678a700 (LWP 519811)]
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[New Thread 0x7fffdfbff700 (LWP 519822)]
[New Thread 0x7fffdf17f700 (LWP 519823)]
[New Thread 0x7fffde9ff700 (LWP 519824)]
[New Thread 0x7fffde1ff700 (LWP 519825)]
[New Thread 0x7fffdd9ff700 (LWP 519826)]
[New Thread 0x7fffdd1ff700 (LWP 519827)]
[New Thread 0x7fffdc9ff700 (LWP 519828)]
[Detaching after vfork from child process 519829]
[Thread 0x7fffe4fff700 (LWP 519814) exited]
[Detaching after vfork from child process 519830]
[Thread 0x7fffe37ff700 (LWP 519816) exited]
[Detaching after vfork from child process 519831]
[Thread 0x7fffe1dff700 (LWP 519818) exited]
[Detaching after vfork from child process 519832]
[Thread 0x7fffe25ff700 (LWP 519817) exited]
libgccjit.so: /tmp/dumps/compiler_builtins.1shhbuin-cgu.1.c:2219:0: error: type mismatch in binary expression
unsigned long

signed int

signed int

_21 = _16 & _20;
libgccjit.so: /tmp/dumps/compiler_builtins.1shhbuin-cgu.1.c:2219:0: error: type mismatch in binary expression
unsigned long

signed int

unsigned long

_22 = _13 + _21;
libgccjit.so: /tmp/dumps/compiler_builtins.1shhbuin-cgu.1.c:2219:0: error: ‘verify_gimple’ failed
0x7fffebe68eb4 verify_gimple_in_seq(gimple*)
        ../../../gcc/gcc/tree-cfg.c:5161
0x7fffebb4eaa5 gimplify_body(tree_node*, bool)
        ../../../gcc/gcc/gimplify.c:15383
0x7fffebb4ec1c gimplify_function_tree(tree_node*)
        ../../../gcc/gcc/gimplify.c:15454
0x7fffeb8cde8e gcc::jit::playback::function::postprocess()
        ../../../gcc/gcc/jit/jit-playback.c:1727
0x7fffeb8ceb5e gcc::jit::playback::context::replay()
        ../../../gcc/gcc/jit/jit-playback.c:3063
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
[Thread 0x7fffdc9ff700 (LWP 519828) exited]
[Thread 0x7fffdd1ff700 (LWP 519827) exited]
[Thread 0x7fffdd9ff700 (LWP 519826) exited]
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[Thread 0x7fffe57ff700 (LWP 519813) exited]
[Thread 0x7fffe5fff700 (LWP 519812) exited]
[Thread 0x7fffe678a700 (LWP 519811) exited]
[Thread 0x7fffeed40500 (LWP 519806) exited]
--Type <RET> for more, q to quit, c to continue without paging--
[Inferior 1 (process 519806) exited with code 04]
(gdb)

[antoyo]

Thanks!

Is the generated file any different?
I'm asking because this line points to the return type of a function static unsigned int _ZN4core3num22__LT_impl_u20_u128_GT_13leading_zeros17hebd36ec74ef717e2E, not a binary operation.

[cr1901]

The line points into the same function for me. Copy of my terminal in less after running less +2219 /tmp/dumps/compiler_builtins.1shhbuin-cgu.1.c:

static unsigned int
_ZN4core3num22__LT_impl_u20_u128_GT_13leading_zeros17hebd36ec74ef717e2E (__uint128_t  __attribute__((aligned(8))) param0)
{
  __uint128_t  __attribute__((aligned(8))) stack_var_1;
  struct struct undefined;
  __uint128_t  __attribute__((aligned(8))) stack_var_1;
  __uint128_t  __attribute__((aligned(8))) zeros;
  __uint128_t  __attribute__((aligned(8)))[3] count_loading_zeroes_results;
  __uint128_t  __attribute__((aligned(8))) loadedValue1346;

start:
  *(bitcast(&stack_var_1, __uint128_t  __attribute__((aligned(8))) *)) = param0;
  if (param0 == (__uint128_t  __attribute__((aligned(8))))0) goto then; else goto else;

then:
  zeros = (__uint128_t  __attribute__((aligned(8))))128;
  goto after;

else:
  count_loading_zeroes_results[(unsigned long long)0] = (__uint128_t  __attribute__((aligned(8))))__builtin_clzll (((unsigned long long)(param0 >> (__uint128_t  __attribute__((aligned(8))))64)));
  count_loading_zeroes_results[(unsigned long long)1] = (__uint128_t  __attribute__((aligned(8))))__builtin_clzll (((unsigned long long)param0)) + (__uint128_t  __attribute__((aligned(8))))64;
  count_loading_zeroes_results[(unsigned long long)2] = (__uint128_t  __attribute__((aligned(8))))128;
  zeros = (__uint128_t  __attribute__((aligned(8))))count_loading_zeroes_results[(!((unsig
/tmp/dumps/compiler_builtins.1shhbuin-cgu.1.c

[antoyo]

What about trying to print p loc->m_line in gdb when breaking on add_error?
Does it show the same info?

[cr1901]

Yes :D! Sorry for breaking this royally :P.

william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc$ LD_LIBRARY_PATH=$(cat gcc_path) gdb --args rustc --crate-name compiler_builtins /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.45/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="compiler-builtins"' --cfg 'feature="core"' --cfg 'feature="default"' --cfg 'feature="rustc-dep-of-std"' -C metadata=17b0aa9941b1c5cf -C extra-filename=-17b0aa9941b1c5cf --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg 'feature="unstable"'
GNU gdb (Ubuntu 9.2-0ubuntu1~20.04) 9.2
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
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For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from rustc...
(gdb) r
Starting program: /home/william/.cargo/bin/rustc --crate-name compiler_builtins /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.45/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg feature=\"compiler-builtins\" --cfg feature=\"core\" --cfg feature=\"default\" --cfg feature=\"rustc-dep-of-std\" -C metadata=17b0aa9941b1c5cf -C extra-filename=-17b0aa9941b1c5cf --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg feature=\"unstable\"
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
process 519981 is executing new program: /home/william/.rustup/toolchains/nightly-2021-06-14-x86_64-unknown-linux-gnu/bin/rustc
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffee3ff700 (LWP 519985)]
{"artifact":"/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/compiler_builtins-17b0aa9941b1c5cf.d","emit":"dep-info"}
{"artifact":"/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta","emit":"metadata"}
[New Thread 0x7fffe678a700 (LWP 519986)]
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[New Thread 0x7fffdd3ff700 (LWP 520002)]
[New Thread 0x7fffdc8ff700 (LWP 520003)]
[Detaching after vfork from child process 520004]
[Thread 0x7fffe51ff700 (LWP 519989) exited]
[Detaching after vfork from child process 520005]
[Thread 0x7fffe39ff700 (LWP 519991) exited]
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[Thread 0x7fffe27ff700 (LWP 519992) exited]
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[Thread 0x7fffe17ff700 (LWP 519994) exited]
libgccjit.so: /tmp/dumps/compiler_builtins.1shhbuin-cgu.1.c:2219:0: error: type mismatch in binary expression
unsigned long

signed int

signed int

_21 = _16 & _20;
libgccjit.so: /tmp/dumps/compiler_builtins.1shhbuin-cgu.1.c:2219:0: error: type mismatch in binary expression
unsigned long

signed int

unsigned long

_22 = _13 + _21;
libgccjit.so: /tmp/dumps/compiler_builtins.1shhbuin-cgu.1.c:2219:0: error: ‘verify_gimple’ failed
0x7fffebe68eb4 verify_gimple_in_seq(gimple*)
        ../../../gcc/gcc/tree-cfg.c:5161
0x7fffebb4eaa5 gimplify_body(tree_node*, bool)
        ../../../gcc/gcc/gimplify.c:15383
0x7fffebb4ec1c gimplify_function_tree(tree_node*)
        ../../../gcc/gcc/gimplify.c:15454
0x7fffeb8cde8e gcc::jit::playback::function::postprocess()
        ../../../gcc/gcc/jit/jit-playback.c:1727
0x7fffeb8ceb5e gcc::jit::playback::context::replay()
        ../../../gcc/gcc/jit/jit-playback.c:3063
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
[Thread 0x7fffdc8ff700 (LWP 520003) exited]
[Thread 0x7fffdd3ff700 (LWP 520002) exited]
[Thread 0x7fffddbff700 (LWP 520001) exited]
[Thread 0x7fffde3ff700 (LWP 520000) exited]
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[Thread 0x7fffdfb7f700 (LWP 519997) exited]
[Thread 0x7fffe057f700 (LWP 519996) exited]
[Thread 0x7fffe0fff700 (LWP 519995) exited]
[Thread 0x7fffe400f700 (LWP 519990) exited]
[Thread 0x7fffe59ff700 (LWP 519988) exited]
[Thread 0x7fffe6589700 (LWP 519987) exited]
[Thread 0x7fffe678a700 (LWP 519986) exited]
[Thread 0x7fffeed40500 (LWP 519981) exited]
--Type <RET> for more, q to quit, c to continue without paging--
[Inferior 1 (process 519981) exited with code 04]
(gdb) b add_error
Breakpoint 1 at 0x7fffeb8bf240: add_error. (2 locations)
(gdb) r
Starting program: /home/william/.rustup/toolchains/nightly-2021-06-14-x86_64-unknown-linux-gnu/bin/rustc --crate-name compiler_builtins /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.45/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg feature=\"compiler-builtins\" --cfg feature=\"core\" --cfg feature=\"default\" --cfg feature=\"rustc-dep-of-std\" -C metadata=17b0aa9941b1c5cf -C extra-filename=-17b0aa9941b1c5cf --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg feature=\"unstable\"

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffee3ff700 (LWP 520010)]
{"artifact":"/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/compiler_builtins-17b0aa9941b1c5cf.d","emit":"dep-info"}
{"artifact":"/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta","emit":"metadata"}
[New Thread 0x7fffe678a700 (LWP 520011)]
[New Thread 0x7fffe5fff700 (LWP 520012)]
[New Thread 0x7fffe57ff700 (LWP 520013)]
[New Thread 0x7fffe4fff700 (LWP 520014)]
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[New Thread 0x7fffdd1ff700 (LWP 520027)]
[New Thread 0x7fffdc9ff700 (LWP 520028)]
[Detaching after vfork from child process 520029]
[Thread 0x7fffe4fff700 (LWP 520014) exited]
[Detaching after vfork from child process 520030]
[Thread 0x7fffe37ff700 (LWP 520016) exited]
[Detaching after vfork from child process 520031]
[Thread 0x7fffe1dff700 (LWP 520018) exited]
[Detaching after vfork from child process 520032]
[Thread 0x7fffe15ff700 (LWP 520019) exited]
[Detaching after vfork from child process 520033]
[Thread 0x7fffe25ff700 (LWP 520017) exited]
[Detaching after vfork from child process 520034]
[Thread 0x7fffe0dff700 (LWP 520020) exited]
--Type <RET> for more, q to quit, c to continue without paging--
[Switching to Thread 0x7fffe3e0f700 (LWP 520015)]

Thread 7 "opt compiler_bu" hit Breakpoint 1, gcc::jit::recording::context::add_error (
    this=0x7fffe8886300, loc=0x7fffdf50d040, fmt=fmt@entry=0x7fffecbf822d "%s")
    at ../../../gcc/gcc/jit/jit-recording.c:1457
1457    {
(gdb) p loc->m_line
$1 = 2219
(gdb)

[cr1901]

Not sure, but would it help if I gave you my own libgccjit.so (external link since it's large)?

[antoyo]

One thing I'm noticing is that it's a function using 128-bit integers.
While I added the support for those in libgccjit, I don't do any checks about whether they are supported on the platform is running on.
One thing you could try is changing the lines initializing the 128-bit integers here to:

        //let i128_type = context.new_c_type(CType::Int128t).get_aligned(8); // TODO: should this be hard-coded?
        let i128_type = i64_type;
        let u8_type = context.new_type::<u8>();
        let u16_type = context.new_type::<u16>();
        let u32_type = context.new_type::<u32>();
        let u64_type = context.new_c_type(CType::ULongLong);
        //let u128_type = context.new_c_type(CType::UInt128t).get_aligned(8); // TODO: should this be hard-coded?
        let u128_type = u64_type;

I don't know if it's easy to download manually, but you could try downloading the artifact libgccjit.so built in the CI of my gcc fork.

[cr1901]

Now we get further before dying painfully :)

william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc$ ./test.sh --release
    Finished release [optimized] target(s) in 0.01s
[BUILD] mini_core
[BUILD] example
[AOT] mini_core_hello_world
./target/out/mini_core_hello_world
abc
bcd
Hello printf
Hello
World!
abc
Boxed outer got dropped!
Inner got dropped!
Inner got dropped!
Inner got dropped!
TLS works!

[BUILD] sysroot
    Updating crates.io index
   Compiling core v0.0.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/core)
       Fresh cc v1.0.68
       Fresh autocfg v1.0.1
     Running `rustc --crate-name core --edition=2018 sysroot_src/library/core/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=e063c7bddda6fe07 -C extra-filename=-e063c7bddda6fe07 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling compiler_builtins v0.1.45
   Compiling libc v0.2.97
     Running `/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/build/compiler_builtins-2759047e8e5760ee/build-script-build`
     Running `/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/build/libc-7e3dc487b4357978/build-script-build`
   Compiling unwind v0.0.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/unwind)
   Compiling miniz_oxide v0.4.4
   Compiling std v0.0.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/std)
     Running `/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/build/unwind-610dfb8f39c4878a/build-script-build`
     Running `/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/build/miniz_oxide-713c8c4c6d9b1cdb/build-script-build`
     Running `/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/build/std-1e5d80d9271fccf3/build-script-build`
   Compiling rustc-std-workspace-core v1.99.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/rustc-std-workspace-core)
     Running `rustc --crate-name rustc_std_workspace_core --edition=2018 sysroot_src/library/rustc-std-workspace-core/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=59ed975568390d45 -C extra-filename=-59ed975568390d45 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcore-e063c7bddda6fe07.rmeta -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
     Running `rustc --crate-name compiler_builtins /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/compiler_builtins-0.1.45/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="compiler-builtins"' --cfg 'feature="core"' --cfg 'feature="default"' --cfg 'feature="rustc-dep-of-std"' -C metadata=17b0aa9941b1c5cf -C extra-filename=-17b0aa9941b1c5cf --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg 'feature="unstable"'`
     Running `rustc --crate-name libc /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/libc-0.2.97/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="align"' --cfg 'feature="rustc-dep-of-std"' --cfg 'feature="rustc-std-workspace-core"' -C metadata=d9c67c9823a5a417 -C extra-filename=-d9c67c9823a5a417 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern rustc_std_workspace_core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg freebsd11 --cfg libc_priv_mod_use --cfg libc_union --cfg libc_const_size_of --cfg libc_align --cfg libc_core_cvoid --cfg libc_packedN --cfg libc_cfg_target_vendor --cfg libc_thread_local`
   Compiling alloc v0.0.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/alloc)
     Running `rustc --crate-name alloc --edition=2018 sysroot_src/library/alloc/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=3609986ba2166e42 -C extra-filename=-3609986ba2166e42 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcore-e063c7bddda6fe07.rmeta -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling cfg-if v0.1.10
     Running `rustc --crate-name cfg_if --edition=2018 /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/cfg-if-0.1.10/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="compiler_builtins"' --cfg 'feature="core"' --cfg 'feature="rustc-dep-of-std"' -C metadata=9029ccdd346cff20 -C extra-filename=-9029ccdd346cff20 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling adler v1.0.2
     Running `rustc --crate-name adler /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/adler-1.0.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="compiler_builtins"' --cfg 'feature="core"' --cfg 'feature="rustc-dep-of-std"' -C metadata=cd1d62a1f8a0c3aa -C extra-filename=-cd1d62a1f8a0c3aa --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling rustc-demangle v0.1.20
     Running `rustc --crate-name rustc_demangle /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-demangle-0.1.20/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="compiler_builtins"' --cfg 'feature="core"' --cfg 'feature="rustc-dep-of-std"' -C metadata=aa9d7b60fd39c5fb -C extra-filename=-aa9d7b60fd39c5fb --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling rustc-std-workspace-alloc v1.99.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/rustc-std-workspace-alloc)
     Running `rustc --crate-name rustc_std_workspace_alloc --edition=2018 sysroot_src/library/rustc-std-workspace-alloc/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=2dda073ce9a0a7dc -C extra-filename=-2dda073ce9a0a7dc --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liballoc-3609986ba2166e42.rmeta -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
     Running `rustc --crate-name unwind --edition=2018 sysroot_src/library/unwind/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=287c1c47d3886e9c -C extra-filename=-287c1c47d3886e9c --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern cfg_if=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcfg_if-9029ccdd346cff20.rmeta --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcore-e063c7bddda6fe07.rmeta --extern libc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liblibc-d9c67c9823a5a417.rmeta -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling panic_abort v0.0.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/panic_abort)
     Running `rustc --crate-name panic_abort --edition=2018 sysroot_src/library/panic_abort/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=04b47013043fd66e -C extra-filename=-04b47013043fd66e --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liballoc-3609986ba2166e42.rmeta --extern cfg_if=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcfg_if-9029ccdd346cff20.rmeta --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcore-e063c7bddda6fe07.rmeta --extern libc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liblibc-d9c67c9823a5a417.rmeta -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling gimli v0.23.0
     Running `rustc --crate-name gimli --edition=2018 /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/gimli-0.23.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="alloc"' --cfg 'feature="compiler_builtins"' --cfg 'feature="core"' --cfg 'feature="read"' --cfg 'feature="rustc-dep-of-std"' -C metadata=c86d284a0c1f0970 -C extra-filename=-c86d284a0c1f0970 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_alloc-2dda073ce9a0a7dc.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling object v0.22.0
     Running `rustc --crate-name object --edition=2018 /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/object-0.22.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="alloc"' --cfg 'feature="archive"' --cfg 'feature="coff"' --cfg 'feature="compiler_builtins"' --cfg 'feature="core"' --cfg 'feature="elf"' --cfg 'feature="macho"' --cfg 'feature="pe"' --cfg 'feature="read_core"' --cfg 'feature="rustc-dep-of-std"' --cfg 'feature="unaligned"' -C metadata=4c9b63dcef94e0ca -C extra-filename=-4c9b63dcef94e0ca --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_alloc-2dda073ce9a0a7dc.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
     Running `rustc --crate-name miniz_oxide --edition=2018 /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/miniz_oxide-0.4.4/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="alloc"' --cfg 'feature="compiler_builtins"' --cfg 'feature="core"' --cfg 'feature="rustc-dep-of-std"' -C metadata=e04ac7dbbebd6197 -C extra-filename=-e04ac7dbbebd6197 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern adler=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libadler-cd1d62a1f8a0c3aa.rmeta --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_alloc-2dda073ce9a0a7dc.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling std_detect v0.1.5 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/stdarch/crates/std_detect)
     Running `rustc --crate-name std_detect --edition=2018 sysroot_src/library/stdarch/crates/std_detect/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="alloc"' --cfg 'feature="compiler_builtins"' --cfg 'feature="core"' --cfg 'feature="libc"' --cfg 'feature="rustc-dep-of-std"' --cfg 'feature="std_detect_dlsym_getauxval"' --cfg 'feature="std_detect_file_io"' -C metadata=0bcc93f299036f16 -C extra-filename=-0bcc93f299036f16 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern cfg_if=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcfg_if-9029ccdd346cff20.rmeta --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern libc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liblibc-d9c67c9823a5a417.rmeta --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_alloc-2dda073ce9a0a7dc.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling hashbrown v0.11.2
     Running `rustc --crate-name hashbrown --edition=2018 /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/hashbrown-0.11.2/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="alloc"' --cfg 'feature="compiler_builtins"' --cfg 'feature="core"' --cfg 'feature="nightly"' --cfg 'feature="rustc-dep-of-std"' --cfg 'feature="rustc-internal-api"' -C metadata=ec4a4681ae6598a6 -C extra-filename=-ec4a4681ae6598a6 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_alloc-2dda073ce9a0a7dc.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling panic_unwind v0.0.0 (/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/panic_unwind)
     Running `rustc --crate-name panic_unwind --edition=2018 sysroot_src/library/panic_unwind/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=4f20393b92478d24 -C extra-filename=-4f20393b92478d24 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liballoc-3609986ba2166e42.rmeta --extern cfg_if=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcfg_if-9029ccdd346cff20.rmeta --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcore-e063c7bddda6fe07.rmeta --extern libc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liblibc-d9c67c9823a5a417.rmeta --extern unwind=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libunwind-287c1c47d3886e9c.rmeta -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
   Compiling addr2line v0.14.1
     Running `rustc --crate-name addr2line /home/william/.cargo/registry/src/github.com-1ecc6299db9ec823/addr2line-0.14.1/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="alloc"' --cfg 'feature="compiler_builtins"' --cfg 'feature="core"' --cfg 'feature="rustc-dep-of-std"' -C metadata=16a03ef430a1a7f1 -C extra-filename=-16a03ef430a1a7f1 --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rmeta --extern gimli=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libgimli-c86d284a0c1f0970.rmeta --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_alloc-2dda073ce9a0a7dc.rmeta --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_std_workspace_core-59ed975568390d45.rmeta --cap-lints allow -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort`
     Running `rustc --crate-name std --edition=2018 sysroot_src/library/std/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type dylib --crate-type rlib --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="addr2line"' --cfg 'feature="backtrace"' --cfg 'feature="gimli-symbolize"' --cfg 'feature="miniz_oxide"' --cfg 'feature="object"' --cfg 'feature="panic_unwind"' --cfg 'feature="std_detect_dlsym_getauxval"' --cfg 'feature="std_detect_file_io"' -C metadata=81180535f9fb2a4f --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern addr2line=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libaddr2line-16a03ef430a1a7f1.rlib --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liballoc-3609986ba2166e42.rlib --extern cfg_if=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcfg_if-9029ccdd346cff20.rlib --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rlib --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcore-e063c7bddda6fe07.rlib --extern hashbrown=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libhashbrown-ec4a4681ae6598a6.rlib --extern libc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liblibc-d9c67c9823a5a417.rlib --extern miniz_oxide=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libminiz_oxide-e04ac7dbbebd6197.rlib --extern object=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libobject-4c9b63dcef94e0ca.rlib --extern panic_abort=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libpanic_abort-04b47013043fd66e.rlib --extern panic_unwind=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libpanic_unwind-4f20393b92478d24.rlib --extern rustc_demangle=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_demangle-aa9d7b60fd39c5fb.rlib --extern std_detect=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libstd_detect-0bcc93f299036f16.rlib --extern unwind=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libunwind-287c1c47d3886e9c.rlib -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg backtrace_in_libstd`
libgccjit.so: error: conversion of register to a different size in ‘view_convert_expr’
VIEW_CONVERT_EXPR<uint128_t>(param0_6(D));

_2 = VIEW_CONVERT_EXPR<uint128_t>(param0_6(D));
during GIMPLE pass: ssa
libgccjit.so: error: verify_gimple failed
0x7ffa62eeb673 verify_gimple_in_cfg(function*, bool)
        ../../../gcc/gcc/tree-cfg.c:5509
0x7ffa62daf99e execute_function_todo
        ../../../gcc/gcc/passes.c:2042
0x7ffa62db01ca execute_todo
        ../../../gcc/gcc/passes.c:2096
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
error: could not compile `std`

Caused by:
  process didn't exit successfully: `rustc --crate-name std --edition=2018 sysroot_src/library/std/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type dylib --crate-type rlib --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="addr2line"' --cfg 'feature="backtrace"' --cfg 'feature="gimli-symbolize"' --cfg 'feature="miniz_oxide"' --cfg 'feature="object"' --cfg 'feature="panic_unwind"' --cfg 'feature="std_detect_dlsym_getauxval"' --cfg 'feature="std_detect_file_io"' -C metadata=81180535f9fb2a4f --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern addr2line=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libaddr2line-16a03ef430a1a7f1.rlib --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liballoc-3609986ba2166e42.rlib --extern cfg_if=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcfg_if-9029ccdd346cff20.rlib --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rlib --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcore-e063c7bddda6fe07.rlib --extern hashbrown=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libhashbrown-ec4a4681ae6598a6.rlib --extern libc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liblibc-d9c67c9823a5a417.rlib --extern miniz_oxide=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libminiz_oxide-e04ac7dbbebd6197.rlib --extern object=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libobject-4c9b63dcef94e0ca.rlib --extern panic_abort=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libpanic_abort-04b47013043fd66e.rlib --extern panic_unwind=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libpanic_unwind-4f20393b92478d24.rlib --extern rustc_demangle=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_demangle-aa9d7b60fd39c5fb.rlib --extern std_detect=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libstd_detect-0bcc93f299036f16.rlib --extern unwind=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libunwind-287c1c47d3886e9c.rlib -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg backtrace_in_libstd` (exit status: 4)

real    0m55.008s
user    1m23.294s
sys     0m5.342s
william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc$

I cannot seem to duplicate this error... cargo seems to be setting some env vars and not printing them as part of -v output?

EDIT: cargo build -vv gives me the environment variables.

william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc/build_sysroot$ LD_LIBRARY_PATH=$(cat ../gcc_path) rustc --crate-name std --edition=2018 sysroot_src/library/std/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type dylib --crate-type rlib --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="addr2line"' --cfg 'feature="backtrace"' --cfg 'feature="gimli-symbolize"' --cfg 'feature="miniz_oxide"' --cfg 'feature="object"' --cfg 'feature="panic_unwind"' --cfg 'feature="std_detect_dlsym_getauxval"' --cfg 'feature="std_detect_file_io"' -C metadata=81180535f9fb2a4f --out-dir /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps --target x86_64-unknown-linux-gnu -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps -L dependency=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/debug/deps --extern addr2line=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libaddr2line-16a03ef430a1a7f1.rlib --extern alloc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liballoc-3609986ba2166e42.rlib --extern cfg_if=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcfg_if-9029ccdd346cff20.rlib --extern compiler_builtins=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcompiler_builtins-17b0aa9941b1c5cf.rlib --extern core=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libcore-e063c7bddda6fe07.rlib --extern hashbrown=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libhashbrown-ec4a4681ae6598a6.rlib --extern libc=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/liblibc-d9c67c9823a5a417.rlib --extern miniz_oxide=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libminiz_oxide-e04ac7dbbebd6197.rlib --extern object=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libobject-4c9b63dcef94e0ca.rlib --extern panic_abort=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libpanic_abort-04b47013043fd66e.rlib --extern panic_unwind=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libpanic_unwind-4f20393b92478d24.rlib --extern rustc_demangle=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/librustc_demangle-aa9d7b60fd39c5fb.rlib --extern std_detect=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libstd_detect-0bcc93f299036f16.rlib --extern unwind=/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/target/x86_64-unknown-linux-gnu/debug/deps/libunwind-287c1c47d3886e9c.rlib -Cpanic=abort -Cdebuginfo=2 -Zpanic-abort-tests -Zcodegen-backend=/home/william/Projects/toolchains/rustc_codegen_gcc/target/release/librustc_codegen_gcc.so --sysroot /home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot -Z force-unstable-if-unmarked -Cpanic=abort --cfg backtrace_in_libstd
{"message":"environment variable `STD_ENV_ARCH` not defined","code":null,"level":"error","spans":[{"file_name":"sysroot_src/library/std/src/env.rs","byte_start":27057,"byte_end":27077,"line_start":887,"line_end":887,"column_start":28,"column_end":48,"is_primary":true,"text":[{"text":"    pub const ARCH: &str = env!(\"STD_ENV_ARCH\");","highlight_start":28,"highlight_end":48}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":{"span":{"file_name":"sysroot_src/library/std/src/env.rs","byte_start":27057,"byte_end":27077,"line_start":887,"line_end":887,"column_start":28,"column_end":48,"is_primary":false,"text":[{"text":"    pub const ARCH: &str = env!(\"STD_ENV_ARCH\");","highlight_start":28,"highlight_end":48}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null},"macro_decl_name":"env!","def_site_span":{"file_name":"/home/william/Projects/toolchains/rustc_codegen_gcc/build_sysroot/sysroot_src/library/core/src/macros/mod.rs","byte_start":30314,"byte_end":30477,"line_start":881,"line_end":884,"column_start":5,"column_end":6,"is_primary":false,"text":[{"text":"    macro_rules! env {","highlight_start":5,"highlight_end":1},{"text":"        ($name:expr $(,)?) => {{ /* compiler built-in */ }};","highlight_start":1,"highlight_end":1},{"text":"        ($name:expr, $error_msg:expr $(,)?) => {{ /* compiler built-in */ }};","highlight_start":1,"highlight_end":1},{"text":"    }","highlight_start":1,"highlight_end":6}],"label":null,"suggested_replacement":null,"suggestion_applicability":null,"expansion":null}}}],"children":[],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror\u001b[0m\u001b[0m\u001b[1m: environment variable `STD_ENV_ARCH` not defined\u001b[0m\n\u001b[0m   \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m--> \u001b[0m\u001b[0msysroot_src/library/std/src/env.rs:887:28\u001b[0m\n\u001b[0m    \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\n\u001b[0m\u001b[1m\u001b[38;5;12m887\u001b[0m\u001b[0m \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m| \u001b[0m\u001b[0m    pub const ARCH: &str = env!(\"STD_ENV_ARCH\");\u001b[0m\n\u001b[0m    \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m| \u001b[0m\u001b[0m                           \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;9m^^^^^^^^^^^^^^^^^^^^\u001b[0m\n\u001b[0m    \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m|\u001b[0m\n\u001b[0m    \u001b[0m\u001b[0m\u001b[1m\u001b[38;5;12m= \u001b[0m\u001b[0m\u001b[1mnote\u001b[0m\u001b[0m: this error originates in the macro `env` (in Nightly builds, run with -Z macro-backtrace for more info)\u001b[0m\n\n"}
{"message":"aborting due to previous error","code":null,"level":"error","spans":[],"children":[],"rendered":"\u001b[0m\u001b[1m\u001b[38;5;9merror\u001b[0m\u001b[0m\u001b[1m: aborting due to previous error\u001b[0m\n\n"}
william@xubuntu-dtrain:~/Projects/toolchains/rustc_codegen_gcc/build_sysroot$

[bjorn3]

You can use -vvv to show the env vars I think.

[antoyo]

@cr1901 Are you sure you updated both the line for i128_type and u128_type?
Here it looks like it's trying to bitcast a value to u128.

[cr1901]

Are you sure you updated both the line for i128_type and u128_type?

Working on getting GDB info and dumps now...