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A-mir-optArea: MIR optimizationsArea: MIR optimizationsC-bugCategory: This is a bug.Category: This is a bug.P-mediumMedium priorityMedium priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.requires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.
Description
One of my tests (test_nested_rest
) is failing on beta (in CI and locally) but not stable (locally).
https://github.com/djc/mendes/pull/18/checks?check_run_id=759480560
Minimal reproduction:
When executed with miri, it doesn't panic. When the call to nothing() is moved before the assignment to self.prev, it also doesn't panic. Works on stable, panics on both beta and nightly-2020-06-10.
searched nightlies: from nightly-2020-04-12 to nightly-2020-06-10
regressed nightly: nightly-2020-05-15
searched commits: from 75e1463 to a74d186
regressed commit: 7c34d8d
bisected with cargo-bisect-rustc v0.5.2
Host triple: x86_64-apple-darwin
Reproduce with:
cargo bisect-rustc --start 2020-04-12 --end 2020-06-10 -- run
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A-mir-optArea: MIR optimizationsArea: MIR optimizationsC-bugCategory: This is a bug.Category: This is a bug.P-mediumMedium priorityMedium priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.requires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.