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Lifetime bounds in Copy impls are ignored #29149
Description
UPDATE: Mentoring instructions below.
Affected Versions
rustc 1.3.0 - 1.5.0
STR
#[derive(Clone)] struct Foo<'a>(&'a u32);
impl Copy for Foo<'static> {}
fn main() {
let s = 2;
let a = Foo(&s);
drop(a);
drop(a);
}Expected Result
Foo<'a> is not Copy, so this should cause a borrowck error.
Actual Result
The code compiles :-).
Activity
nikomatsakis commentedon Oct 21, 2015
Nominating.
nikomatsakis commentedon Oct 22, 2015
triage: P-high
nikomatsakis commentedon Nov 5, 2015
Correct behavior here is not entirely obvious, given that we erase lifetimes at trans. Possibly we should be treating this affine, or possibly the impl should be an error? Have to mull this over.
cc @rust-lang/lang
nikomatsakis commentedon Nov 5, 2015
Nominating for discussion at the lang meeting.
54 remaining items
nikomatsakis commentedon Jan 30, 2018
Fixed (with NLL) in #47877
Do not ignore lifetime bounds in Copy impls
Rollup merge of rust-lang#47877 - spastorino:lifetime-bounds-in-copy,…
Rollup merge of rust-lang#47877 - spastorino:lifetime-bounds-in-copy,…
Rollup merge of rust-lang#47877 - spastorino:lifetime-bounds-in-copy,…
add outlives annotations to `BTreeMap`
add outlives annotations to `BTreeMap`
Rollup merge of rust-lang#51914 - nikomatsakis:nll-fix-issue-issue-bt…
Rollup merge of rust-lang#51914 - nikomatsakis:nll-fix-issue-issue-bt…
Rollup merge of rust-lang#51914 - nikomatsakis:nll-fix-issue-issue-bt…