LLVM assertion failed when attempting to install cargo-criterion

[saethlin]

I install all my utilities in a bit of a unique setup with the goal of finding bugs. Perhaps like this one. I pull the latest rust commit, set

[llvm]
assertions = true

And run x build, with a custom toolchain set up called master-stage1 to the stage1 artifacts. Then I install utilities with this:

RUSTFLAGS="-Ccodegen-units=1 -Cforce-frame-pointers=yes -Cembed-bitcode=yes -Clto=fat -Cpanic=abort" cargo +master-stage1 install --target=x86_64-unknown-linux-gnu

A long list of binary crates follows. But currently, cargo-criterion does not build. I see this error:

   Compiling cargo-criterion v1.1.0
rustc: /checkout/src/llvm-project/llvm/lib/Analysis/InstructionPrecedenceTracking.cpp:99: void llvm::InstructionPrecedenceTracking::validate(const llvm::BasicBlock *) const: Assertion `It->second == nullptr && "Block is marked as having special instructions but in fact it  has " "none!"' failed.
error: could not compile `cargo-criterion`

Caused by:
  process didn't exit successfully: `rustc --crate-name cargo_criterion --edition=2018 /home/ben/.cargo/registry/src/github.heygears.com-1ecc6299db9ec823/cargo-criterion-1.1.0/src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no --cfg 'feature="criterion-plot"' --cfg 'feature="default"' --cfg 'feature="gnuplot_backend"' --cfg 'feature="plotters"' --cfg 'feature="plotters_backend"' -C metadata=841c971ccd0a44a3 -C extra-filename=-841c971ccd0a44a3 --out-dir /tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps --target x86_64-unknown-linux-gnu -L dependency=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps -L dependency=/tmp/cargo-installoHM8Uc/release/deps --extern anyhow=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libanyhow-335a02709795f7b3.rlib --extern atty=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libatty-e9a1e5205ef9284d.rlib --extern cast=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libcast-34b92d6be5760477.rlib --extern chrono=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libchrono-b483049206357f3a.rlib --extern clap=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libclap-c9cdd34a3f4c6d02.rlib --extern criterion_plot=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libcriterion_plot-00640a548f2ff1ec.rlib --extern lazy_static=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/liblazy_static-c62a2588d1d86244.rlib --extern linked_hash_map=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/liblinked_hash_map-75eeecf61eb4b9da.rlib --extern linked_hash_set=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/liblinked_hash_set-c9e7cbacc23d6223.rlib --extern log=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/liblog-6e3df9f143c1cedb.rlib --extern num_traits=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libnum_traits-2a41da9f08d9fba1.rlib --extern oorandom=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/liboorandom-eded64dc41f41e73.rlib --extern plotters=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libplotters-ead05f4c4043b836.rlib --extern rayon=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/librayon-89e2e2f93bae27d8.rlib --extern serde=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libserde-741824d90db71d25.rlib --extern serde_cbor=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libserde_cbor-3f1d61b2ede8f0c7.rlib --extern serde_derive=/tmp/cargo-installoHM8Uc/release/deps/libserde_derive-e7cd7a8d6adf4e7d.so --extern serde_json=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libserde_json-01455dc3926f0c27.rlib --extern simplelog=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libsimplelog-c293988276fa4483.rlib --extern tinytemplate=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libtinytemplate-47711e5eabc0b1d6.rlib --extern toml=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libtoml-2974066f02f64691.rlib --extern walkdir=/tmp/cargo-installoHM8Uc/x86_64-unknown-linux-gnu/release/deps/libwalkdir-4bd511db30d7d618.rlib --cap-lints allow -Ccodegen-units=1 -Cforce-frame-pointers=yes -Cembed-bitcode=yes -Clto=fat -Cpanic=abort` (signal: 6, SIGABRT: process abort signal)
error: failed to compile `cargo-criterion v1.1.0`, intermediate artifacts can be found at `/tmp/cargo-installoHM8Uc`

I would attach the intermediate artifacts, but as a .tar.gz they exceed the GitHub file size limit, and GitHub is rejecting my attempt to upload a .tar.xz. Do let me know if there is some file in particular that would be helpful.

[saethlin]

@rustbot labels +A-llvm

[nikic]

I would attach the intermediate artifacts, but as a .tar.gz they exceed the GitHub file size limit, and GitHub is rejecting my attempt to upload a .tar.xz. Do let me know if there is some file in particular that would be helpful.

Can you please run cargo under -v, take the last rustc command and rerun it with -C save-temps and attach the .bc files that produces (maybe with a different output directory to separate them)?

[saethlin]

with a different output directory

Do you mean CARGO_TARGET_DIR?

[saethlin]

Oh you must mean --out-dir 🤦

cargo-criterion-assertion.tar.gz

[nikic]

Thanks, I can reproduce an assertion failure under lto<O3>, though it's a different one:

opt: /home/npopov/repos/llvm-project/llvm/lib/Analysis/AliasSetTracker.cpp:236: bool llvm::AliasSet::aliasesUnknownInst(const llvm::Instruction*, llvm::AliasAnalysis&) const: Assertion `Inst->mayReadOrWriteMemory() && "Instruction must either read or write memory."' failed.

This is likely llvm/llvm-project#51333.

[nikic]

Upstream fix: llvm/llvm-project@560e694

[nikic]

Could you please check whether this issue has been resolved? The LLVM fix and update landed a while ago already.

[saethlin]

Oops, thanks for reminder. Yes I can confirm that my example no longer reproduces.