mirror of https://github.com/rust-lang/rust
30 lines
728 B
Rust
30 lines
728 B
Rust
// Various unsuccessful attempts to put the unboxed closure kind
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// inference into an awkward position that might require fixed point
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// iteration (basically where inferring the kind of a closure `c`
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// would require knowing the kind of `c`). I currently believe this is
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// impossible.
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fn a() {
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let mut closure0 = None;
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//~^ ERROR type annotations needed
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let vec = vec![1, 2, 3];
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loop {
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{
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let closure1 = || {
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match closure0.take() {
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Some(c) => {
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return c();
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}
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None => { }
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}
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};
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closure1();
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}
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closure0 = || vec;
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}
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}
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fn main() { }
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