23 lines
787 B
Rust
23 lines
787 B
Rust
#![allow(warnings)]
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pub fn fail(x: Option<&(Iterator<Item=()>+Send)>)
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-> Option<&Iterator<Item=()>> {
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// This call used to trigger an LLVM assertion because the return
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// slot had type "Option<&Iterator>"* instead of
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// "Option<&(Iterator+Send)>"* -- but this now yields a
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// compilation error and I'm not sure how to create a comparable
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// test. To ensure that this PARTICULAR failure doesn't occur
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// again, though, I've left this test here, so if this ever starts
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// to compile again, we can adjust the test appropriately (clearly
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// it should never ICE...). -nmatsakis
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inner(x) //~ ERROR mismatched types
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}
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pub fn inner(x: Option<&(Iterator<Item=()>+Send)>)
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-> Option<&(Iterator<Item=()>+Send)> {
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x
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}
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fn main() {}
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