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See https://travis-ci.org/apache/arrow/jobs/591264273 for failed build
error: internal compiler error: src/librustc_traits/normalize_erasing_regions.rs:42: could not fully normalize `fn() -> usize {std::mem::size_of::<<T as datatypes::ArrowPrimitiveType>::Native>}`
thread 'rustc' panicked at 'Box<Any>', src/librustc_errors/lib.rs:912:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
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 1.40.0-nightly (488381ce9 2019-09-28) running on x86_64-unknown-linux-gnu
note: compiler flags: -C debuginfo=2 -C incremental --crate-type lib
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Area: Associated items (types, constants & functions)Area: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Trait systemCategory: This is a bug.Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️High priorityRelevant to the compiler team, which will review and decide on the PR/issue.Performance or correctness regression from stable to nightly.
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Centril commentedon Sep 30, 2019
Could you please provide a backtrace for the ICE?
[-]internal compiler error building Apache Arrow PR[/-][+]ICE building Apache Arrow PR[/+][-]ICE building Apache Arrow PR[/-][+]ICE building Apache Arrow PR in `librustc_traits/normalize_erasing_regions.rs:42`[/+]kyle-mccarthy commentedon Sep 30, 2019
Centril commentedon Sep 30, 2019
cc @nikomatsakis @oli-obk
oli-obk commentedon Oct 2, 2019
cc @wesleywiser more const prop fallout?
wesleywiser commentedon Oct 2, 2019
Seems likely. I'll have some time tonight to look at it.
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