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c339541f73
The test code did have an inference failure, but that would have failed on Rust 1.79 and earlier too. Now it is rewritten to be specifically affected by 1.80's `impl FromIterator<_> for Box<str>`.
14 lines
574 B
Rust
14 lines
574 B
Rust
#![crate_name = "time"]
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#![crate_type = "lib"]
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// This code compiled without error in Rust 1.79, but started failing in 1.80
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// after the addition of several `impl FromIterator<_> for Box<str>`.
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pub fn parse() -> Option<Vec<()>> {
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let iter = std::iter::once(Some(())).map(|o| o.map(Into::into));
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let items = iter.collect::<Option<Box<_>>>()?; //~ ERROR E0282
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//~^ NOTE this is an inference error on crate `time` caused by an API change in Rust 1.80.0; update `time` to version `>=0.3.35`
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Some(items.into())
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//~^ NOTE type must be known at this point
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}
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