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ICE from higher ranked subtyping #67498

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matthewjasper opened this issue Dec 21, 2019 · 1 comment · Fixed by #97882
Closed

ICE from higher ranked subtyping #67498

matthewjasper opened this issue Dec 21, 2019 · 1 comment · Fixed by #97882
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@matthewjasper
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A-lifetimes Area: Lifetimes / regions C-bug Category: This is a bug. E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. glacier ICE tracked in rust-lang/glacier. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@matthewjasper
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The following code ICEs

fn f<'a, 'b, 'd, 'e> (
    x: for<'c> fn(
        fn(&'c fn(&'c ())),
        fn(&'c fn(&'c ())),
        fn(&'c fn(&'c ())),
        fn(&'c fn(&'c ())),
    )
) -> fn(
        fn(&'a fn(&'d ())),
        fn(&'b fn(&'d ())),
        fn(&'a fn(&'e ())),
        fn(&'b fn(&'e ())),
) {
    x
}

https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=169cdb4aaa19abce2baa2b45e876f797
@matthewjasper matthewjasper added A-lifetimes Area: Lifetimes / regions I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ C-bug Category: This is a bug. labels Dec 21, 2019
@matthewjasper matthewjasper self-assigned this Dec 21, 2019
@Centril Centril added the T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. label Dec 21, 2019
@rust-lang-glacier-bot rust-lang-glacier-bot added the glacier ICE tracked in rust-lang/glacier. label Dec 22, 2019
@github-actions github-actions bot mentioned this issue Jun 8, 2022
Merged
@JohnTitor JohnTitor mentioned this issue Jun 8, 2022
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@JohnTitor
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Triage: Fixed by #95565, marking as E-needs-test.

@JohnTitor JohnTitor added the E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. label Jun 8, 2022
@JohnTitor JohnTitor mentioned this issue Jun 8, 2022
Merged
JohnTitor added a commit to JohnTitor/rust that referenced this issue Jun 8, 2022
@JohnTitor
Add regresion test for rust-lang#67498
0f2a2fb
@JohnTitor JohnTitor mentioned this issue Jun 8, 2022
Merged
@compiler-errors compiler-errors mentioned this issue Jun 8, 2022
Merged
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this issue Jun 8, 2022
@matthiaskrgr
Rollup merge of rust-lang#97882 - JohnTitor:issue-67498, r=compiler-e…
c84db32 
…rrors

Add regresion test for rust-lang#67498

Closes rust-lang#67498
r? ``@compiler-errors``
@matthiaskrgr matthiaskrgr mentioned this issue Jun 8, 2022
Closed
bors added a commit to rust-lang-ci/rust that referenced this issue Jun 8, 2022
@bors
Auto merge of rust-lang#97896 - compiler-errors:rollup-mrl7ng0, r=com…
15f5622 
…piler-errors

Rollup of 9 pull requests

Successful merges:

 - rust-lang#97557 (Fix indices and remove some unwraps in arg mismatch algorithm)
 - rust-lang#97830 (Add std::alloc::set_alloc_error_hook example)
 - rust-lang#97856 (Don't suggest adding `let` in certain `if` conditions)
 - rust-lang#97857 (Suggest escaping `box` as identifier)
 - rust-lang#97871 (Suggest using `iter()` or `into_iter()` for `Vec`)
 - rust-lang#97882 (Add regresion test for rust-lang#67498)
 - rust-lang#97883 (Remove `ignore-compare-mode-nll` annotations from tests)
 - rust-lang#97891 (Update books)
 - rust-lang#97894 (Fix polonius compare mode.)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors closed this as completed in a36671a Jun 9, 2022
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@matthewjasper matthewjasper

Labels
A-lifetimes Area: Lifetimes / regions C-bug Category: This is a bug. E-needs-test Call for participation: An issue has been fixed and does not reproduce, but no test has been added. glacier ICE tracked in rust-lang/glacier. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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Add regresion test for #67498 JohnTitor/rust
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@Centril @matthewjasper @JohnTitor @rust-lang-glacier-bot