mirror of https://github.com/rust-lang/rust
30 lines
796 B
Rust
30 lines
796 B
Rust
#![feature(coverage_attribute)]
|
|
//@ edition: 2021
|
|
|
|
// If the span extractor can't find any relevant spans for a function, the
|
|
// refinement loop will terminate with nothing in its `prev` slot. If the
|
|
// subsequent code tries to unwrap `prev`, it will panic.
|
|
//
|
|
// This scenario became more likely after #118525 started discarding spans that
|
|
// can't be un-expanded back to within the function body.
|
|
//
|
|
// Regression test for "invalid attempt to unwrap a None some_prev", as seen
|
|
// in issues such as #118643 and #118662.
|
|
|
|
#[coverage(off)]
|
|
fn main() {
|
|
affected_function()();
|
|
}
|
|
|
|
macro_rules! macro_that_defines_a_function {
|
|
(fn $name:ident () $body:tt) => {
|
|
fn $name () -> impl Fn() $body
|
|
}
|
|
}
|
|
|
|
macro_that_defines_a_function! {
|
|
fn affected_function() {
|
|
|| ()
|
|
}
|
|
}
|