From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- src/test/ui/match/match-ref-mut-let-invariance.rs | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 src/test/ui/match/match-ref-mut-let-invariance.rs (limited to 'src/test/ui/match/match-ref-mut-let-invariance.rs') diff --git a/src/test/ui/match/match-ref-mut-let-invariance.rs b/src/test/ui/match/match-ref-mut-let-invariance.rs new file mode 100644 index 000000000..a33be09ac --- /dev/null +++ b/src/test/ui/match/match-ref-mut-let-invariance.rs @@ -0,0 +1,16 @@ +// Check that when making a ref mut binding with type `&mut T`, the +// type `T` must match precisely the type `U` of the value being +// matched, and in particular cannot be some supertype of `U`. Issue +// #23116. This test focuses on a `let`. + +#![allow(dead_code)] +struct S<'b>(&'b i32); +impl<'b> S<'b> { + fn bar<'a>(&'a mut self) -> &'a mut &'a i32 { + let ref mut x = self.0; + x + //~^ ERROR lifetime may not live long enough + } +} + +fn main() {} -- cgit v1.2.3