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ICE: assertion failed: (left == right) in type_of.rs #62658

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@fenhl

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@fenhl

I just ran into this ICE:

thread 'rustc' panicked at 'assertion failed: `(left == right)`
  left: `Size { raw: 404 }`,
 right: `Size { raw: 400 }`', src/librustc_codegen_llvm/type_of.rs:148:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.38.0-nightly (71f9384e3 2019-07-12) running on armv7-unknown-linux-gnueabihf

note: compiler flags: -C opt-level=3 --crate-type lib

note: some of the compiler flags provided by cargo are hidden

https://github.com/rust-lang/rust/blob/master/src/librustc_codegen_llvm/type_of.rs#L148

I can't share the code but here are some observations:

  • The ICE occurs in debug mode as well.
  • It does not occur when running cargo check.
  • It does not occur on my MacBook (same nightly, different architecture).

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A-async-awaitArea: Async & AwaitA-codegenArea: Code generationA-coroutinesArea: CoroutinesC-bugCategory: This is a bug.I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️O-ArmTarget: 32-bit Arm processors (armv6, armv7, thumb...), including 64-bit Arm in AArch32 stateP-highHigh priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.regression-from-stable-to-nightlyPerformance or correctness regression from stable to nightly.

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