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Generic associated types can shadow lifetimes #67512

Closed
Tracked by #44265
matthewjasper opened this issue Dec 22, 2019 · 0 comments · Fixed by #68938
Closed
Tracked by #44265

Generic associated types can shadow lifetimes #67512

matthewjasper opened this issue Dec 22, 2019 · 0 comments · Fixed by #68938
Labels
A-GATs Area: Generic associated types (GATs) C-bug Category: This is a bug. E-mentor Call for participation: This issue has a mentor. Use #t-compiler/help on Zulip for discussion. F-generic_associated_types `#![feature(generic_associated_types)]` a.k.a. GATs requires-nightly This issue requires a nightly compiler in some way. 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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matthewjasper commented Dec 22, 2019 •
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The following code is incorrectly permitted

#![feature(generic_associated_types)]

trait X<'a> {
    type Y<'a>;           //~ Should error
}

impl<'a> X<'a> for () {
    type Y<'a> = &'a ();  //~ Should error
}
@matthewjasper matthewjasper added E-mentor Call for participation: This issue has a mentor. Use #t-compiler/help on Zulip for discussion. C-bug Category: This is a bug. F-generic_associated_types `#![feature(generic_associated_types)]` a.k.a. GATs labels Dec 22, 2019
@matthewjasper matthewjasper mentioned this issue Dec 22, 2019
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@Centril Centril added requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ labels Dec 22, 2019
@matthewjasper matthewjasper removed the I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ label Dec 22, 2019
@basil-cow basil-cow mentioned this issue Feb 7, 2020
Merged
bors added a commit that referenced this issue Feb 7, 2020
@bors
Auto merge of #68938 - Areredify:gat_lifetime_shadowing, r=<try>
26ab07b 
fix lifetime shadowing check in GATs

closes #67512
@bors bors closed this as completed in 998daf3 Feb 14, 2020
@fmease fmease added the A-GATs Area: Generic associated types (GATs) label Nov 2, 2024
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A-GATs Area: Generic associated types (GATs) C-bug Category: This is a bug. E-mentor Call for participation: This issue has a mentor. Use #t-compiler/help on Zulip for discussion. F-generic_associated_types `#![feature(generic_associated_types)]` a.k.a. GATs requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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fix lifetime shadowing check in GATs basil-cow/rust
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@Centril @fmease @matthewjasper