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/issues/issue-18937-1.rs | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 src/test/ui/issues/issue-18937-1.rs (limited to 'src/test/ui/issues/issue-18937-1.rs') diff --git a/src/test/ui/issues/issue-18937-1.rs b/src/test/ui/issues/issue-18937-1.rs new file mode 100644 index 000000000..57e56d832 --- /dev/null +++ b/src/test/ui/issues/issue-18937-1.rs @@ -0,0 +1,21 @@ +// run-pass +// Test that we are able to type-check this example. In particular, +// knowing that `T: 'a` allows us to deduce that `[U]: 'a` (because +// when `T=[U]` it implies that `U: 'a`). +// +// Regr. test for live code we found in the wild when fixing #18937. + +pub trait Leak { + fn leak<'a>(self) -> &'a T where T: 'a; +} + +impl Leak<[U]> for Vec { + fn leak<'a>(mut self) -> &'a [U] where [U]: 'a { + let r: *mut [U] = &mut self[..]; + std::mem::forget(self); + unsafe { &mut *r } + } +} +fn main() { + println!("Hello, world!"); +} -- cgit v1.2.3