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.rs | 40 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 src/test/ui/issues/issue-18937.rs (limited to 'src/test/ui/issues/issue-18937.rs') diff --git a/src/test/ui/issues/issue-18937.rs b/src/test/ui/issues/issue-18937.rs new file mode 100644 index 000000000..af85e5b2b --- /dev/null +++ b/src/test/ui/issues/issue-18937.rs @@ -0,0 +1,40 @@ +// Regression test for #18937. + +use std::fmt; + +#[derive(Debug)] +struct MyString<'a>(&'a String); + +struct B { + list: Vec>, +} + +trait A<'a> { + fn foo(&mut self, f: F) + where F: fmt::Debug + 'a, + Self: Sized; +} + +impl<'a> A<'a> for B { + fn foo(&mut self, f: F) + where F: fmt::Debug + 'static, //~ ERROR impl has stricter + { + self.list.push(Box::new(f)); + } +} + +fn main() { + let mut b = B { list: Vec::new() }; + + // Create a borrowed pointer, put it in `b`, then drop what's borrowing it + let a = "hello".to_string(); + b.foo(MyString(&a)); + + // Drop the data which `b` has a reference to + drop(a); + + // Use the data, probably segfaulting + for b in b.list.iter() { + println!("{:?}", b); + } +} -- cgit v1.2.3