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rustc_codegen_llvm: use opaque LLVM structs for `extern type`. #58271

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eddyb commented Feb 7, 2019

Mostly an experiment, @RalfJung suggested it could be used to inform LLVM that for e.g.:

extern {
    type Foo;
    static BAR: Foo;
}

BAR does not have a known size, and therefore nothing can be assumed about the validity of accesses at arbitrary offsets.

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rust-highfive commented Feb 7, 2019

r? @matthewjasper

(rust_highfive has picked a reviewer for you, use r? to override)

@rust-highfive rust-highfive added the S-waiting-on-review label Feb 7, 2019

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Mark-Simulacrum commented Feb 7, 2019

@bors try
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rust-highfive commented Feb 7, 2019

The job x86_64-gnu-llvm-6.0 of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log. 
travis_time:end:11287380:start=1549552874252653399,finish=1549552877816427588,duration=3563774189
$ git checkout -qf FETCH_HEAD
travis_fold:end:git.checkout

Encrypted environment variables have been removed for security reasons.
See https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions
$ export SCCACHE_BUCKET=rust-lang-ci-sccache2
$ export SCCACHE_REGION=us-west-1
Setting environment variables from .travis.yml
$ export IMAGE=x86_64-gnu-llvm-6.0
---
[00:29:53]    Compiling syntax_ext v0.0.0 (/checkout/src/libsyntax_ext)
[00:31:36] error: Could not compile `rustc`.
[00:31:36] 
[00:31:36] Caused by:
[00:31:36]   process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustc --edition=2018 --crate-name rustc src/librustc/lib.rs --color always --error-format json --crate-type dylib --emit=dep-info,link -C prefer-dynamic -C opt-level=2 -C metadata=309a20172fb31332 -C extra-filename=-309a20172fb31332 --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/release/deps --extern arena=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libarena-2a5ca4a2271b79fb.so --extern backtrace=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libbacktrace-f0413d019d723f75.rlib --extern bitflags=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libbitflags-efbd6a3abde65501.rlib --extern byteorder=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libbyteorder-8c1e8f16599bf30e.rlib --extern chalk_engine=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libchalk_engine-bb1cd8fbb7e00e52.rlib --extern flate2=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libflate2-f43ae6c3411ca149.rlib --extern fmt_macros=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libfmt_macros-acd986a53b7fc9b6.so --extern graphviz=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libgraphviz-a260af77db91e626.so --extern jobserver=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libjobserver-5a4f685d1621907d.rlib --extern lazy_static=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/liblazy_static-9eb95490f8422936.rlib --extern log=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/liblog-35f1bc47fe6cfe27.rlib --extern num_cpus=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libnum_cpus-82a3836cc93acca6.rlib --extern parking_lot=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libparking_lot-1345c635df6f58f1.rlib --extern polonius_engine=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libpolonius_engine-b9edd3fc4b5a0ca3.rlib --extern rustc_rayon=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_rayon-6169de1cce634c21.rlib --extern rustc_rayon_core=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_rayon_core-9a44af17bc2fc22d.rlib --extern rustc_apfloat=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_apfloat-2516d20df7ebf6f3.rlib --extern rustc_data_structures=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_data_structures-7091ddd67cb3b569.so --extern rustc_errors=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_errors-008b001a75e72bab.so --extern rustc_fs_util=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_fs_util-a3b3661f8403ae4e.so --extern rustc_target=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_target-25b0b0b27470e86f.so --extern scoped_tls=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libscoped_tls-93ab01348ef91b16.rlib --extern serialize=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libserialize-c4ef1c553401fd57.so --extern serialize=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libserialize-c4ef1c553401fd57.rlib --extern smallvec=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libsmallvec-31aff729b9c3f11c.rlib --extern syntax=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libsyntax-4f839fe45ebd7204.so --extern syntax_pos=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libsyntax_pos-ed206f608b6eff08.so --extern tempfile=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libtempfile-a973379e644acecc.rlib --cfg always_verify_llvm_ir -L native=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/build/backtrace-sys-4f8e6397a1a291a0/out -L native=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/build/miniz-sys-f65171650a992726/out` (signal: 11, SIGSEGV: invalid memory reference)
[00:31:36] expected success, got: exit code: 101
[00:31:36] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap build
[00:31:36] Build completed unsuccessfully in 0:26:37
[00:31:36] Makefile:18: recipe for target 'all' failed
[00:31:36] Makefile:18: recipe for target 'all' failed
[00:31:36] make: *** [all] Error 1
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 2.
travis_time:start:03a887fc
$ date && (curl -fs --head https://google.com | grep ^Date: | sed 's/Date: //g' || true)
Thu Feb  7 15:53:04 UTC 2019
---
travis_time:end:0063dd0a:start=1549554785266052708,finish=1549554785271831658,duration=5778950
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:11b9e666
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:start:crashlog
obj/cores/core.9336.!checkout!obj!build!x86_64-unknown-linux-gnu!stage1!bin!rustc
[New LWP 9338]
[New LWP 9378]
[New LWP 9336]
[New LWP 9377]
warning: Could not load shared library symbols for 14 libraries, e.g. /lib/x86_64-linux-gnu/libc.so.6.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
Core was generated by `/checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/rustc --edition=2018 --'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007fded8aa6944 in ?? ()
[Current thread is 1 (LWP 9338)]
#0  0x00007fded8aa6944 in ?? ()
#1  0x0000000000000002 in ?? ()
#2  0x00007fdee2746c60 in ?? ()
#3  0x000000000000000f in ?? ()
#4  0x00007fde5427d0e8 in ?? ()
#5  0x00007fde5427cc18 in ?? ()
#6  0x00007fde7e1f6360 in ?? ()
#7  0x00007fdee2746c60 in ?? ()
#8  0x0000000000000000 in ?? ()
travis_time:end:11b9e666:start=1549554785277006747,finish=1549554786530609003,duration=1253602256
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:007f5c00
travis_time:start:007f5c00
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:167df8a6
$ dmesg | grep -i kill

I'm a bot! I can only do what humans tell me to, so if this was not helpful or you have suggestions for improvements, please ping or otherwise contact @TimNN. (Feature Requests)
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bors commented Feb 7, 2019

⌛️ Trying commit 56240ec with merge 9c905f8...

bors added a commit that referenced this pull request Feb 7, 2019

@bors
Auto merge of #58271 - eddyb:opaque-extern-type, r=<try> 
rustc_codegen_llvm: use opaque LLVM structs for `extern type`.

Mostly an experiment, @RalfJung suggested it could be used to inform LLVM that for e.g.:
```rust
extern {
    type Foo;
    static BAR: Foo;
}
```
`BAR` does not have a known size, and therefore nothing can be assumed about the validity of accesses at arbitrary offsets.
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9c905f8
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bors commented Feb 7, 2019

💔 Test failed - checks-travis

@bors bors added S-waiting-on-author and removed S-waiting-on-review labels Feb 7, 2019

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rust-highfive commented Feb 7, 2019

The job dist-x86_64-linux of your PR failed on Travis (raw log). Through arcane magic we have determined that the following fragments from the build log may contain information about the problem.

Click to expand the log. 
travis_fold:end:services

travis_fold:start:git.checkout
travis_time:start:1a8d7141
$ git clone --depth=2 --branch=try https://github.com/rust-lang/rust.git rust-lang/rust
---
[01:02:33]    Compiling syntax_ext v0.0.0 (/checkout/src/libsyntax_ext)
[01:04:01] error: Could not compile `rustc`.
[01:04:01] 
[01:04:01] Caused by:
[01:04:01]   process didn't exit successfully: `/checkout/obj/build/bootstrap/debug/rustc --edition=2018 --crate-name rustc src/librustc/lib.rs --color always --error-format json --crate-type dylib --emit=dep-info,link -C prefer-dynamic -C opt-level=2 -C metadata=605a404c62e81837 -C extra-filename=-605a404c62e81837 --out-dir /checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -C linker=clang -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps -L dependency=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/release/deps --extern arena=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libarena-272327a42837066f.so --extern backtrace=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libbacktrace-60b6e510c3368f81.rlib --extern bitflags=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libbitflags-eb2f598266b9e1a1.rlib --extern byteorder=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libbyteorder-f14cd72e64c32363.rlib --extern chalk_engine=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libchalk_engine-b0742107ee400c71.rlib --extern flate2=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libflate2-feff8ee3de29a960.rlib --extern fmt_macros=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libfmt_macros-d507fc3d268c5b2e.so --extern graphviz=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libgraphviz-b56fdb34339fe92b.so --extern jobserver=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libjobserver-88df31933dfa412e.rlib --extern lazy_static=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/liblazy_static-144b77090f62ae88.rlib --extern log=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/liblog-435e3408c3b4502e.rlib --extern num_cpus=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libnum_cpus-65a72ea59e738e8a.rlib --extern parking_lot=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libparking_lot-0bd6f849edb21f64.rlib --extern polonius_engine=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libpolonius_engine-e71cd28deda9d301.rlib --extern rustc_rayon=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_rayon-fb456fadc477bba9.rlib --extern rustc_rayon_core=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_rayon_core-5867afaa2924a633.rlib --extern rustc_apfloat=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_apfloat-b491e9743ed06c34.rlib --extern rustc_data_structures=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_data_structures-14cfdda528ec2778.so --extern rustc_errors=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_errors-d989f7ca48994da8.so --extern rustc_fs_util=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_fs_util-69d29c352de30a1c.so --extern rustc_target=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_target-e16f6e1462058c55.so --extern scoped_tls=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libscoped_tls-73ee63dcdac8fa1a.rlib --extern serialize=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libserialize-db646f5624409a50.so --extern serialize=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libserialize-db646f5624409a50.rlib --extern smallvec=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libsmallvec-5fc7a5028055b005.rlib --extern syntax=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libsyntax-c9a459f3ce426d2a.so --extern syntax_pos=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libsyntax_pos-08a266c223f41ff7.so --extern tempfile=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/deps/libtempfile-6cbd630620c86fee.rlib -L native=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/build/backtrace-sys-2443a2c730b16aa1/out -L native=/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-rustc/x86_64-unknown-linux-gnu/release/build/miniz-sys-b572ae085766f8b0/out` (signal: 11, SIGSEGV: invalid memory reference)
[01:04:01] command did not execute successfully: "/checkout/obj/build/x86_64-unknown-linux-gnu/stage0/bin/cargo" "build" "--target" "x86_64-unknown-linux-gnu" "-j" "4" "--release" "--locked" "--color" "always" "--features" "jemalloc" "--manifest-path" "/checkout/src/rustc/Cargo.toml" "--message-format" "json"
[01:04:01] failed to run: /checkout/obj/build/bootstrap/debug/bootstrap dist --host x86_64-unknown-linux-gnu --target x86_64-unknown-linux-gnu
[01:04:01] Build completed unsuccessfully in 0:44:04
travis_time:end:156af4e0:start=1549557066471940765,finish=1549560908290090777,duration=3841818150012
The command "stamp sh -x -c "$RUN_SCRIPT"" exited with 1.
---
travis_time:end:309aa1f4:start=1549560909637700661,finish=1549560909645048379,duration=7347718
travis_fold:end:after_failure.3
travis_fold:start:after_failure.4
travis_time:start:0c15d10d
$ ln -s . checkout && for CORE in obj/cores/core.*; do EXE=$(echo $CORE | sed 's|obj/cores/core\.[0-9]*\.!checkout!\(.*\)|\1|;y|!|/|'); if [ -f "$EXE" ]; then printf travis_fold":start:crashlog\n\033[31;1m%s\033[0m\n" "$CORE"; gdb --batch -q -c "$CORE" "$EXE" -iex 'set auto-load off' -iex 'dir src/' -iex 'set sysroot .' -ex bt -ex q; echo travis_fold":"end:crashlog; fi; done || true
travis_fold:start:crashlog
obj/cores/core.15165.!checkout!obj!build!x86_64-unknown-linux-gnu!stage1!bin!rustc
[New LWP 15167]
[New LWP 15205]
[New LWP 15165]
[New LWP 15206]
warning: Could not load shared library symbols for 7 libraries, e.g. /lib64/libpthread.so.0.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
Core was generated by `/checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/rustc --edition=2018 --'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007fe29c5ba352 in llvm::PointerType::get(llvm::Type*, unsigned int) () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/../lib/libLLVM-8.so
[Current thread is 1 (LWP 15167)]
#0  0x00007fe29c5ba352 in llvm::PointerType::get(llvm::Type*, unsigned int) () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/../lib/libLLVM-8.so
#1  0x00007fe29c49cf63 in llvm::GetElementPtrInst::getGEPReturnType(llvm::Type*, llvm::Value*, llvm::ArrayRef<llvm::Value*>) () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/../lib/libLLVM-8.so
#2  0x00007fe29c4c79e3 in llvm::GetElementPtrInst::Create(llvm::Type*, llvm::Value*, llvm::ArrayRef<llvm::Value*>, llvm::Twine const&, llvm::Instruction*) () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/../lib/libLLVM-8.so
#3  0x00007fe29c4dfc3f in llvm::IRBuilder<llvm::ConstantFolder, llvm::IRBuilderDefaultInserter>::CreateConstInBoundsGEP2_32(llvm::Type*, llvm::Value*, unsigned int, unsigned int, llvm::Twine const&) () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/../lib/libLLVM-8.so
#4  0x00007fe29c4dd092 in LLVMBuildStructGEP () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/../lib/libLLVM-8.so
#5  0x00007fe29f1e4acf in _$LT$rustc_codegen_ssa..mir..place..PlaceRef$LT$$u27$tcx$C$$u20$V$GT$$GT$::project_field::_$u7b$$u7b$closure$u7d$$u7d$::h36422029cf3dc42f () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#6  0x00007fe29f1e4541 in _$LT$rustc_codegen_ssa..mir..place..PlaceRef$LT$$u27$tcx$C$$u20$V$GT$$GT$::project_field::hd0d2310f737dfd67 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#7  0x00007fe29f113a16 in rustc_codegen_ssa::mir::place::_$LT$impl$u20$rustc_codegen_ssa..mir..FunctionCx$LT$$u27$a$C$$u20$$u27$tcx$C$$u20$Bx$GT$$GT$::codegen_place::hd628f2c84d7ab1c9 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#8  0x00007fe29f115f3d in rustc_codegen_ssa::mir::rvalue::_$LT$impl$u20$rustc_codegen_ssa..mir..FunctionCx$LT$$u27$a$C$$u20$$u27$tcx$C$$u20$Bx$GT$$GT$::codegen_rvalue_operand::hfbe202af341cfee1 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#9  0x00007fe29f10998b in rustc_codegen_ssa::mir::codegen_mir::h2aead98bb48fc1f2 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#10 0x00007fe29f1d1e97 in rustc_codegen_ssa::base::codegen_instance::h82bdd351957dcc08 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#11 0x00007fe29f21357c in rustc_codegen_ssa::mono_item::MonoItemExt::define::hf8343e45e0022853 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#12 0x00007fe29f13df43 in rustc_codegen_llvm::base::compile_codegen_unit::module_codegen::h48749a4680682c58 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#13 0x00007fe29f232d32 in rustc::dep_graph::graph::DepGraph::with_task::hd01d335e232410d5 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#14 0x00007fe29f14d798 in _$LT$rustc_codegen_llvm..LlvmCodegenBackend$u20$as$u20$rustc_codegen_ssa..traits..backend..ExtraBackendMethods$GT$::compile_codegen_unit::hf1a159a7dbd4b7ef () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#15 0x00007fe29f1cf077 in rustc_codegen_ssa::base::codegen_crate::ha4606c8ccf7c44ab () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#16 0x00007fe29f14e421 in _$LT$rustc_codegen_llvm..LlvmCodegenBackend$u20$as$u20$rustc_codegen_utils..codegen_backend..CodegenBackend$GT$::codegen_crate::he6ff28ebfe80c233 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#17 0x00007fe2a98d7894 in rustc::util::common::time::h4e4a90e2fc4d8fcf () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#18 0x00007fe2a99763e0 in rustc_driver::driver::phase_4_codegen::hdeabecd705c28b69 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#19 0x00007fe2a98e4142 in rustc_driver::driver::compile_input::_$u7b$$u7b$closure$u7d$$u7d$::hfdc9cb8f1e767dd9 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#20 0x00007fe2a98df925 in _$LT$std..thread..local..LocalKey$LT$T$GT$$GT$::with::h2c792c4a8970aa6b () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#21 0x00007fe2a989d8d5 in rustc::ty::context::TyCtxt::create_and_enter::he5fec7a6b225057d () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#22 0x00007fe2a9973e08 in rustc_driver::driver::compile_input::hc668cc86fcc09067 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#23 0x00007fe2a99061f6 in _$LT$scoped_tls..ScopedKey$LT$T$GT$$GT$::set::h3ba20e19ce9c88a5 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#24 0x00007fe2a991fefb in rustc_driver::run_compiler::h0927532178f8a5e4 () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#25 0x00007fe2a990710b in _$LT$scoped_tls..ScopedKey$LT$T$GT$$GT$::set::h7c5d3c1b603f4bdc () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#26 0x00007fe2a996be03 in syntax::with_globals::h237724a7b50df29e () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#27 0x00007fe2a958ca5a in __rust_maybe_catch_panic () at src/libpanic_unwind/lib.rs:92
#28 0x00007fe2a9965411 in _$LT$F$u20$as$u20$alloc..boxed..FnBox$LT$A$GT$$GT$::call_box::h7a5e95a5e2cd6d1a () from ./checkout/obj/build/x86_64-unknown-linux-gnu/stage1/bin/../lib/librustc_driver-11b92226e856e2ec.so
#29 0x00007fe2a958b81e in _$LT$alloc..boxed..Box$LT$$LP$dyn$u20$alloc..boxed..FnBox$LT$A$C$$u20$Output$u3d$R$GT$$u20$$u2b$$u20$$u27$_$RP$$GT$$u20$as$u20$core..ops..function..FnOnce$LT$A$GT$$GT$::call_once::h6d657de847213980 () at /rustc/9c905f840dc185bf8525d62f8059147eee74098e/src/liballoc/boxed.rs:744
#30 std::sys_common::thread::start_thread::h84e9771978345a15 () at src/libstd/sys_common/thread.rs:14
#31 std::sys::unix::thread::Thread::new::thread_start::hb94fd77b16c84faa () at src/libstd/sys/unix/thread.rs:81
#32 0x00007fe2a930083d in ?? ()
#33 0x0000000000000000 in ?? ()
travis_time:end:0c15d10d:start=1549560909649601133,finish=1549560911475575168,duration=1825974035
travis_fold:end:after_failure.4
travis_fold:start:after_failure.5
travis_time:start:0ef063e8
travis_time:start:0ef063e8
$ cat ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers || true
cat: ./obj/build/x86_64-unknown-linux-gnu/native/asan/build/lib/asan/clang_rt.asan-dynamic-i386.vers: No such file or directory
travis_fold:end:after_failure.5
travis_fold:start:after_failure.6
travis_time:start:1362ac70
$ dmesg | grep -i kill

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eddyb commented Feb 8, 2019

@Mark-Simulacrum Ohh, the coredump backtraces are nice!
I wish we could enable debuginfo-lines.
Anyway, are LLVM assertions disabled? It seems like something they'd catch.
(I'll try a build of this locally later)
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Mark-Simulacrum commented Feb 8, 2019

You could manually enable an ALT builder for llvm asserts, neither one that's run so far has them enabled.
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eddyb commented Feb 10, 2019

The LLVM assertion failure is:

rustc: src/llvm-project/llvm/include/llvm/IR/Instructions.h:847: llvm::Type *llvm::checkGEPType(llvm::Type *): Assertion Ty && "Invalid GetElementPtrInst indices for type!" failed.

@eddyb eddyb referenced this pull request Feb 13, 2019

Open

Tracking issue for RFC 1861: Extern types #43467

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