mirror of https://github.com/rust-lang/rust
41 lines
793 B
Rust
41 lines
793 B
Rust
// Regression test for #18937.
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use std::fmt;
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#[derive(Debug)]
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struct MyString<'a>(&'a String);
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struct B {
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list: Vec<Box<dyn fmt::Debug>>,
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}
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trait A<'a> {
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fn foo<F>(&mut self, f: F)
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where F: fmt::Debug + 'a,
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Self: Sized;
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}
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impl<'a> A<'a> for B {
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fn foo<F>(&mut self, f: F)
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where F: fmt::Debug + 'static, //~ ERROR impl has stricter
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{
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self.list.push(Box::new(f));
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}
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}
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fn main() {
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let mut b = B { list: Vec::new() };
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// Create a borrowed pointer, put it in `b`, then drop what's borrowing it
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let a = "hello".to_string();
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b.foo(MyString(&a));
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// Drop the data which `b` has a reference to
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drop(a);
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// Use the data, probably segfaulting
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for b in b.list.iter() {
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println!("{:?}", b);
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}
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}
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