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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/regions/regions-trait-variance.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/regions/regions-trait-variance.rs')
-rw-r--r-- | src/test/ui/regions/regions-trait-variance.rs | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/test/ui/regions/regions-trait-variance.rs b/src/test/ui/regions/regions-trait-variance.rs new file mode 100644 index 000000000..94ffb85c9 --- /dev/null +++ b/src/test/ui/regions/regions-trait-variance.rs @@ -0,0 +1,44 @@ +// Issue #12470. + +trait X { + fn get_i(&self) -> isize; +} + +struct B { + i: isize +} + +impl X for B { + fn get_i(&self) -> isize { + self.i + } +} + +impl Drop for B { + fn drop(&mut self) { + println!("drop"); + } +} + +struct A<'r> { + p: &'r (dyn X + 'r) +} + +fn make_a(p: &dyn X) -> A { + A{p:p} +} + +fn make_make_a<'a>() -> A<'a> { + + let b: Box<B> = Box::new(B { + i: 1, + }); + + let bb: &B = &*b; + make_a(bb) //~ ERROR cannot return value referencing local data `*b` +} + +fn main() { + let a = make_make_a(); + println!("{}", a.p.get_i()); +} |