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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:03 +0000 |
commit | 64d98f8ee037282c35007b64c2649055c56af1db (patch) | |
tree | 5492bcf97fce41ee1c0b1cc2add283f3e66cdab0 /tests/ui/regions/closure-in-projection-issue-97405.rs | |
parent | Adding debian version 1.67.1+dfsg1-1. (diff) | |
download | rustc-64d98f8ee037282c35007b64c2649055c56af1db.tar.xz rustc-64d98f8ee037282c35007b64c2649055c56af1db.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/regions/closure-in-projection-issue-97405.rs')
-rw-r--r-- | tests/ui/regions/closure-in-projection-issue-97405.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tests/ui/regions/closure-in-projection-issue-97405.rs b/tests/ui/regions/closure-in-projection-issue-97405.rs new file mode 100644 index 000000000..e567d5c27 --- /dev/null +++ b/tests/ui/regions/closure-in-projection-issue-97405.rs @@ -0,0 +1,32 @@ +// Regression test for #97405. +// In `good_generic_fn` the param `T` ends up in the substs of closures/generators, +// but we should be able to prove `<Gen<T> as Iterator>::Item: 'static` without +// requiring `T: 'static` + +// edition:2018 +// check-fail + +fn opaque<F>(_: F) -> impl Iterator { b"".iter() } + +fn assert_static<T: 'static>(_: T) {} + +fn good_generic_fn<T>() { + // Previously, proving `<OpaqueTy<type_of(async {})> as Iterator>::Item: 'static` + // used to require `T: 'static`. + assert_static(opaque(async {}).next()); + assert_static(opaque(|| {}).next()); + assert_static(opaque(opaque(async {}).next()).next()); +} + + +// This should fail because `T` ends up in the upvars of the closure. +fn bad_generic_fn<T: Copy>(t: T) { + assert_static(opaque(async move { t; }).next()); + //~^ ERROR the associated type `<impl Iterator as Iterator>::Item` may not live long enough + assert_static(opaque(move || { t; }).next()); + //~^ ERROR the associated type `<impl Iterator as Iterator>::Item` may not live long enough + assert_static(opaque(opaque(async move { t; }).next()).next()); + //~^ ERROR the associated type `<impl Iterator as Iterator>::Item` may not live long enough +} + +fn main() {} |