rustc 1.32 using system LLVM crashes while building the resvg crate #57762

RazrFalcon · 2019-01-19T19:11:53Z

   Compiling resvg-capi v0.5.0 (/home/user/.cache/pikaur/build/resvg-git/src/resvg/capi)
error: Could not compile `resvg-capi`.

Caused by:
  process didn't exit successfully: `rustc --crate-name resvg capi/src/lib.rs --color always --crate-type cdylib --crate-type staticlib --emit=dep-info,link -C opt-level=3 -C lto --cfg 'feature="cairo-backend"' --cfg 'feature="cairo-sys-rs"' --cfg 'feature="glib"' --cfg 'feature="qt-backend"' --cfg 'feature="resvg"' -C metadata=34044ee5526873f1 --out-dir /home/user/.cache/pikaur/build/resvg-git/src/resvg/target/release/deps -L dependency=/home/user/.cache/pikaur/build/resvg-git/src/resvg/target/release/deps --extern cairo_sys=/home/user/.cache/pikaur/build/resvg-git/src/resvg/target/release/deps/libcairo_sys-a11059b04a916894.rlib --extern fern=/home/user/.cache/pikaur/build/resvg-git/src/resvg/target/release/deps/libfern-f758ae3d5f3ac504.rlib --extern glib=/home/user/.cache/pikaur/build/resvg-git/src/resvg/target/release/deps/libglib-42c67ca816dc468b.rlib --extern log=/home/user/.cache/pikaur/build/resvg-git/src/resvg/target/release/deps/liblog-4fed47ee5064f102.rlib --extern resvg=/home/user/.cache/pikaur/build/resvg-git/src/resvg/target/release/deps/libresvg-9bfdf02a73881248.rlib -L native=/home/user/.cache/pikaur/build/resvg-git/src/resvg/target/release/build/resvg-qt-529ad70e8602e985/out` (signal: 11, SIGSEGV: invalid memory reference)

Steps to reproduce:

sudo pacman -S rust
git clone https://github.com/RazrFalcon/resvg.git
cd resvg/capi
cargo build --release

The master branch can be built without rustc crashing on Gentoo and on Travis (Ubuntu 14.04.5 LTS).

UPD: I've tried to build it too and I have the same error. Looks like something wrong with the Arch's rustc. Because if we use the one installed via rustup - everything is ok.

UPD: it can be fixed by disabling the LTO, which is enabled by default for resvg.

The text was updated successfully, but these errors were encountered:

jonas-schievink · 2019-01-19T19:52:25Z

Arch uses this build config for packaging fwiw:

[llvm]
link-shared = true

[build]
cargo = "/usr/bin/cargo"
rustc = "/usr/bin/rustc"
python = "python2.7"
extended = true
sanitizers = false

[install]
prefix = "/usr"

[rust]
# 0 or the new default of 16 is faster, but can result in worse performance
# https://github.com/rust-lang/rust/issues/47745
codegen-units = 1

debuginfo = true
debuginfo-lines = true

channel = "stable"

rpath = false

[target.x86_64-unknown-linux-gnu]
llvm-config = "/usr/bin/llvm-config"

sfackler · 2019-01-19T20:03:19Z

Arch's build uses the system LLVM, while rustup's uses a bundled one, so the problem is probably due to an LLVM bug that's only present in Arch's version.

Centril · 2019-01-19T21:01:41Z

Tentatively labeling as I-unsound due to "invalid memory reference".

sfackler · 2019-01-19T21:04:59Z

That's how LLVM asserts look when built without debug check enabled.

nikic · 2019-01-19T21:59:47Z

Could you please provide a backtrace for the segfault?

RazrFalcon · 2019-01-20T10:44:43Z

@nikic How can I do this?

hellow554 · 2019-01-21T07:18:23Z

set RUST_BACKTRACE=1 as an environment variable that your packagemanager will respect

RazrFalcon · 2019-01-21T08:40:02Z

@hellow554 It doesn't make any difference. I've also tried RUST_LOG=debug, but nothing interesting there either. Looks like rustc was stripped.

nikic · 2019-01-21T08:54:05Z

I'm not sure what the canonical way to do this, but I'd just take the rustc command cargo printed out and run it under gdb via gdb --args rustc .... Then r and once it crashes bt.

mati865 · 2019-01-21T12:43:59Z

RUST_BACKTRACE won't show anything because rustc doesn't panic.
Backtrace from crashed thread in Arch:

[Switching to Thread 0x7fffeb9bd700 (LWP 1464)]
0x00007ffff2cf735c in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
(gdb) bt
#0  0x00007ffff2cf735c in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#1  0x00007ffff2cf72a5 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#2  0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#3  0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#4  0x00007ffff2cf9284 in llvm::DwarfUnit::constructMemberDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#5  0x00007ffff2cf7105 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#6  0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#7  0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#8  0x00007ffff2cf9284 in llvm::DwarfUnit::constructMemberDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#9  0x00007ffff2cf7105 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#10 0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#11 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#12 0x00007ffff2cf9284 in llvm::DwarfUnit::constructMemberDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#13 0x00007ffff2cf7105 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#14 0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#15 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#16 0x00007ffff2cf9284 in llvm::DwarfUnit::constructMemberDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#17 0x00007ffff2cf7105 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#18 0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#19 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#20 0x00007ffff2cf9284 in llvm::DwarfUnit::constructMemberDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#21 0x00007ffff2cf7105 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#22 0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#23 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#24 0x00007ffff2cf9ac3 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#25 0x00007ffff2cf75dd in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#26 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#27 0x00007ffff2cf9284 in llvm::DwarfUnit::constructMemberDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#28 0x00007ffff2cf7105 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#29 0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#30 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#31 0x00007ffff2cf9284 in llvm::DwarfUnit::constructMemberDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#32 0x00007ffff2cf7105 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#33 0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#34 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#35 0x00007ffff2cf9ac3 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#36 0x00007ffff2cf75dd in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#37 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#38 0x00007ffff2cf9284 in llvm::DwarfUnit::constructMemberDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#39 0x00007ffff2cf7105 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#40 0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#41 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#42 0x00007ffff2cf9ac3 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#43 0x00007ffff2cf75dd in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#44 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#45 0x00007ffff2cf9284 in llvm::DwarfUnit::constructMemberDIE(llvm::DIE&, llvm::DIDerivedType const*) () from /usr/lib/libLLVM-7.so
#46 0x00007ffff2cf7105 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#47 0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#48 0x00007ffff2cf6f56 in llvm::DwarfUnit::constructTypeDIE(llvm::DIE&, llvm::DICompositeType const*) () from /usr/lib/libLLVM-7.so
#49 0x00007ffff2cf75f1 in llvm::DwarfUnit::getOrCreateTypeDIE(llvm::MDNode const*) () from /usr/lib/libLLVM-7.so
#50 0x00007ffff2cf7615 in llvm::DwarfUnit::addType(llvm::DIE&, llvm::DIType const*, llvm::dwarf::Attribute) () from /usr/lib/libLLVM-7.so
#51 0x00007ffff2cd350a in llvm::DwarfCompileUnit::getOrCreateGlobalVariableDIE(llvm::DIGlobalVariable const*, llvm::ArrayRef<llvm::DwarfCompileUnit::GlobalExpr>) () from /usr/lib/libLLVM-7.so
#52 0x00007ffff2cebd13 in llvm::DwarfDebug::beginModule() () from /usr/lib/libLLVM-7.so
#53 0x00007ffff2cb01f9 in llvm::AsmPrinter::doInitialization(llvm::Module&) () from /usr/lib/libLLVM-7.so
#54 0x00007ffff26aec46 in llvm::FPPassManager::doInitialization(llvm::Module&) () from /usr/lib/libLLVM-7.so
#55 0x00007ffff26b9a06 in llvm::legacy::PassManagerImpl::run(llvm::Module&) () from /usr/lib/libLLVM-7.so
#56 0x00007ffff5e6aa9a in LLVMRustWriteOutputFile () from /usr/lib64/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#57 0x00007ffff5e0369c in ?? () from /usr/lib64/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#58 0x00007ffff5e05960 in ?? () from /usr/lib64/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#59 0x00007ffff5e5b1f1 in <rustc_codegen_llvm::LlvmCodegenBackend as rustc_codegen_ssa::traits::write::WriteBackendMethods>::codegen ()
   from /usr/lib64/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#60 0x00007ffff5d8a98c in ?? () from /usr/lib64/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#61 0x00007ffff5d8c459 in ?? () from /usr/lib64/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#62 0x00007ffff7db07ba in __rust_maybe_catch_panic () from /usr/lib/libstd-3572d7be0ebc7029.so
#63 0x00007ffff5db5b18 in ?? () from /usr/lib64/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
#64 0x00007ffff7da69ae in ?? () from /usr/lib/libstd-3572d7be0ebc7029.so
#65 0x00007ffff6113a9d in start_thread () from /usr/lib/libpthread.so.0
#66 0x00007ffff7c65b23 in clone () from /usr/lib/libc.so.6

nikic · 2019-01-21T17:03:56Z

Doesn't look familiar to me, maybe @tromey has seen this trace before?

Mic92 · 2019-01-21T17:24:53Z

This is also downstram tracked for archlinux (#61490) and NixOS (#54323)

* Add support for all ppc64 targets. * Use bundled LLVM instead of system wide LLVM. Rust statically links against LLVM anyway and we can avoid some bugs this way (such as Rust failing to compile Firefox, see rust-lang/rust#57762 Co-authored-by: q66 <daniel@octaforge.org>

foutrelis · 2019-01-21T17:55:19Z

Seems to be fixed by backporting:

cuviper · 2019-01-21T18:20:35Z

I'm investigating this for Fedora too: https://bugzilla.redhat.com/show_bug.cgi?id=1668033

@foutrelis Thanks for identifying those patches -- I will definitely try that next!

cuviper · 2019-01-21T19:05:54Z

I confirmed that the discriminator patch fixes it, thanks again!

That's already in rust/src/llvm, of course. The remaining question here is whether rustc should disable the new enum DWARF for external LLVM7, as I had bisected this to 71ce4c3. Or we can just let this issue serve as notice that this LLVM patch is needed for those that use external LLVM.

See: rust-lang/rust#57762

kyrias · 2019-01-22T13:31:53Z

If that's going to be a requirement, it feels really disingenuous for LLVM 6 be the claimed minimum supported LLVM version.

The earliest actually supported upstream release should be what check_llvm_version actually checks for, and then if distros using older versions are okay with patching their LLVM, they can just disable the version check. (And if that's going to be supported, it would be nice to keep some kind of list of patches that are required for those.)

tromey · 2019-01-22T15:24:20Z

If that's going to be a requirement, it feels really disingenuous for LLVM 6 be the claimed minimum supported LLVM version.

The code in rustc has a fallback for earlier versions of LLVM. The problem here, instead, is that the fallback is not used by LLVM 7, but unfortunately LLVM 7 was released without a necessary bug fix.

Changing the fallback to check for "LLVM >= 8 or Rust LLVM" would be fine. See https://github.com/rust-lang/rust/blob/master/src/librustc_codegen_llvm/debuginfo/metadata.rs#L1163-L1168

tromey · 2019-01-22T17:51:18Z

I have a patch for this, will submit shortly.

tromey · 2019-01-22T18:16:39Z

The main issue with the patch is that if your system LLVM has the fix, then you'll have to patch rustc to back out this workaround; or else have worse debuginfo for enums.

cuviper · 2019-01-22T18:27:38Z

Yeah, it's not obvious what the right answer should be. But since this causes a hard SIGSEGV, it probably is better to take the conservative stance, assuming LLVM7 is unpatched. I will plan on patching Fedora rustc to re-enable this, having patched LLVM already.

Fix issue 57762 against a stock LLVM 7. LLVM 7 was released without a necessary fix for a bug in the DWARF discriminant code. This patch changes rustc to use the fallback mode on (non-Rust) LLVM 7. Closes rust-lang#57762

Issue 57762 points out a compiler crash when the compiler was built using a stock LLVM 7. LLVM 7 was released without a necessary fix for a bug in the DWARF discriminant code. This patch changes rustc to use the fallback mode on (non-Rust) LLVM 7. Closes rust-lang#57762

* Add support for all ppc64 targets. * Use bundled LLVM instead of system wide LLVM. Rust statically links against LLVM anyway and we can avoid some bugs this way (such as Rust failing to compile Firefox, see rust-lang/rust#57762 Co-authored-by: q66 <daniel@octaforge.org>

* Add support for all ppc64 targets. * Use bundled LLVM instead of system wide LLVM. Rust statically links against LLVM anyway and we can avoid some bugs this way (such as Rust failing to compile Firefox, see rust-lang/rust#57762 Co-authored-by: q66 <daniel@octaforge.org> [ci skip]

- llvm-mirror/llvm@da1fb72 - llvm-mirror/llvm@cc1f2a5 it should unbreak firefox: firefox uses rustc with `-C lto' option for some part of its build, and this code path expose the llvm bug. llvm review: https://reviews.llvm.org/D52340 rust issue: rust-lang/rust#57762 bump lang/rust to ensure updated statically linked libraries are taken on update. ok jca@

Issue 57762 points out a compiler crash when the compiler was built using a stock LLVM 7. LLVM 7 was released without a necessary fix for a bug in the DWARF discriminant code. This patch changes rustc to use the fallback mode on (non-Rust) LLVM 7. Closes rust-lang#57762

See: rust-lang/rust#57762 (cherry picked from commit c340704)

Centril removed the I-unsound Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness label Jan 19, 2019

jnbr mentioned this issue Jan 20, 2019

[WIP] rust: update to 1.32.0. void-linux/void-packages#7335

Closed

jonas-schievink mentioned this issue Jan 20, 2019

In 1.25.0, running the rustc tests on a ryzen gets invalid opcodes and eventual reboot #49751

Closed

kekePower mentioned this issue Jan 20, 2019

Unable to compile from git master alacritty/alacritty#2023

Closed

mati865 mentioned this issue Jan 21, 2019

Rustc 1.32 segfaults with llvm 7.0.1 while building fd-find and lto=true enabled #57801

Closed

nikic changed the title ~~rustc 1.32 crashes on Arch Linux while building the resvg crate~~ rustc 1.32 using system LLVM crashes while building the resvg crate Jan 21, 2019

Mic92 mentioned this issue Jan 21, 2019

rust: 1.31.0 -> 1.32.0 NixOS/nixpkgs#54323

Merged

10 tasks

lblasc added a commit to lblasc/nixpkgs that referenced this issue Jan 22, 2019

llvm7: backport patches, fix building rust crates with lto

c340704

See: rust-lang/rust#57762

tromey mentioned this issue Jan 22, 2019

Fix issue 57762 #57840

Merged

bors closed this as completed in 1c95f5a Jan 24, 2019

Whissi mentioned this issue Jan 25, 2019

rustc 1.32 using system LLVM-7 crashes with: error: failed to load bc of "core.9adngr8s-cgu.0": Invalid record #57903

Closed

vcunat pushed a commit to NixOS/nixpkgs that referenced this issue Feb 1, 2019

llvm7: backport patches, fix building rust crates with lto

0ae0273

See: rust-lang/rust#57762 (cherry picked from commit c340704)

alatiera mentioned this issue Feb 19, 2019

Add com.github.Cogitri.gxi flathub/flathub#827

Closed

This was referenced Mar 31, 2019

community/rust: upgrade to 1.32.0 alpinelinux/aports#6071

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main/llvm7: add patch to fix rust build alpinelinux/aports#6892

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rustc 1.32 using system LLVM crashes while building the resvg crate #57762

rustc 1.32 using system LLVM crashes while building the resvg crate #57762

RazrFalcon commented Jan 19, 2019 •

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rustc 1.32 using system LLVM crashes while building the resvg crate #57762

rustc 1.32 using system LLVM crashes while building the resvg crate #57762

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