From 64d98f8ee037282c35007b64c2649055c56af1db Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:03 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- .../variance-covariant-self-trait-match.rs | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 tests/ui/variance/variance-covariant-self-trait-match.rs (limited to 'tests/ui/variance/variance-covariant-self-trait-match.rs') diff --git a/tests/ui/variance/variance-covariant-self-trait-match.rs b/tests/ui/variance/variance-covariant-self-trait-match.rs new file mode 100644 index 000000000..93c25e980 --- /dev/null +++ b/tests/ui/variance/variance-covariant-self-trait-match.rs @@ -0,0 +1,27 @@ +#![allow(dead_code)] + +// Test that even when `Self` is only used in covariant position, it +// is treated as invariant. + +trait Get { + fn get() -> Self; +} + +fn get_min_from_max<'min, 'max, G>() + where 'max : 'min, G : 'max, &'max G : Get +{ + // Previously OK, now an error as traits are invariant. + impls_get::<&'min G>(); + //~^ ERROR lifetime may not live long enough +} + +fn get_max_from_min<'min, 'max, G>() + where 'max : 'min, G : 'max, &'min G : Get +{ + impls_get::<&'max G>(); + //~^ ERROR lifetime may not live long enough +} + +fn impls_get() where G : Get { } + +fn main() { } -- cgit v1.2.3