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03c88aaf21
When going through auto-deref, the `<T as Clone>` impl sometimes needs
to be specified for rustc to actually clone the value and not the
reference.
```
error[E0507]: cannot move out of dereference of `S`
--> $DIR/needs-clone-through-deref.rs:15:18
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LL | for _ in self.clone().into_iter() {}
| ^^^^^^^^^^^^ ----------- value moved due to this method call
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| move occurs because value has type `Vec<usize>`, which does not implement the `Copy` trait
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note: `into_iter` takes ownership of the receiver `self`, which moves value
--> $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL
help: you can `clone` the value and consume it, but this might not be your desired behavior
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LL | for _ in <Vec<usize> as Clone>::clone(&self.clone()).into_iter() {}
| ++++++++++++++++++++++++++++++ +
```
CC #109429.
16 lines
360 B
Rust
16 lines
360 B
Rust
// run-rustfix
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// Test that a by-ref `FnMut` closure gets an error when it tries to
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// consume a value.
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fn call<F>(f: F) where F : Fn() {
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f();
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}
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fn main() {
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let y = vec![format!("World")];
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call(|| {
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<Vec<String> as Clone>::clone(&y).into_iter();
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//~^ ERROR cannot move out of `y`, a captured variable in an `Fn` closure
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});
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}
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