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 --- .../multiple-lifetimes/error-handling.rs | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 src/test/ui/impl-trait/multiple-lifetimes/error-handling.rs (limited to 'src/test/ui/impl-trait/multiple-lifetimes/error-handling.rs') diff --git a/src/test/ui/impl-trait/multiple-lifetimes/error-handling.rs b/src/test/ui/impl-trait/multiple-lifetimes/error-handling.rs new file mode 100644 index 000000000..367e7f4e6 --- /dev/null +++ b/src/test/ui/impl-trait/multiple-lifetimes/error-handling.rs @@ -0,0 +1,26 @@ +#![feature(type_alias_impl_trait)] + +#[derive(Clone)] +struct CopyIfEq(T, U); + +impl Copy for CopyIfEq {} + +type E<'a, 'b> = impl Sized; + +fn foo<'a, 'b, 'c>(x: &'static i32, mut y: &'a i32) -> E<'b, 'c> { + let v = CopyIfEq::<*mut _, *mut _>(&mut { x }, &mut y); + + // This assignment requires that `x` and `y` have the same type due to the + // `Copy` impl. The reason why we are using a copy to create a constraint + // is that only borrow checking (not regionck in type checking) enforces + // this bound. + let u = v; + let _: *mut &'a i32 = u.1; + unsafe { + let _: &'b i32 = *u.0; + //~^ ERROR lifetime may not live long enough + } + u.0 +} + +fn main() {} -- cgit v1.2.3