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// Regression test: issue had to do with "givens" in region inference,
// which were not being considered during the contraction phase.
//@ run-fail
//@ error-pattern:explicit panic
//@ needs-subprocess
struct Parser<'i: 't, 't>(&'i u8, &'t u8);
impl<'i, 't> Parser<'i, 't> {
fn parse_nested_block<F, T>(&mut self, parse: F) -> Result<T, ()>
where for<'tt> F: FnOnce(&mut Parser<'i, 'tt>) -> T
{
panic!()
}
fn expect_exhausted(&mut self) -> Result<(), ()> {
Ok(())
}
}
fn main() {
let x = 0u8;
Parser(&x, &x).parse_nested_block(|input| input.expect_exhausted()).unwrap();
}
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