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