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test: add case for mutating iterator

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Note that this incorrectly suggests a shared borrow,
but at least we know it's happening.
This commit is contained in:
Michael Howell 2021-09-07 00:49:43 -07:00
parent f23003dff1
commit d6ff916c2f
2 changed files with 44 additions and 1 deletions
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9
src/test/ui/suggestions/slice-issue-87994.rs
View file

@ -4,4 +4,13 @@ fn main() {
//~^ ERROR [i32]` is not an iterator [E0277]
//~^^ ERROR known at compilation time
}
struct K {
n: i32,
}
let mut v2 = vec![K { n: 1 }, K { n: 1 }, K { n: 1 }];
for i2 in v2[1..] {
//~^ ERROR [K]` is not an iterator [E0277]
//~^^ ERROR known at compilation time
i2.n = 2;
}
}

36
src/test/ui/suggestions/slice-issue-87994.stderr
View file

@ -32,6 +32,40 @@ note: required by `into_iter`
LL | fn into_iter(self) -> Self::IntoIter;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 2 previous errors
error[E0277]: the size for values of type `[K]` cannot be known at compilation time
--> $DIR/slice-issue-87994.rs:11:13
|
LL | for i2 in v2[1..] {
| ^^^^^^^
| |
| expected an implementor of trait `IntoIterator`
| help: consider borrowing here: `&v2[1..]`
|
= note: the trait bound `[K]: IntoIterator` is not satisfied
= note: required because of the requirements on the impl of `IntoIterator` for `[K]`
note: required by `into_iter`
--> $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL
|
LL | fn into_iter(self) -> Self::IntoIter;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error[E0277]: `[K]` is not an iterator
--> $DIR/slice-issue-87994.rs:11:13
|
LL | for i2 in v2[1..] {
| ^^^^^^^
| |
| expected an implementor of trait `IntoIterator`
| help: consider borrowing here: `&v2[1..]`
|
= note: the trait bound `[K]: IntoIterator` is not satisfied
= note: required because of the requirements on the impl of `IntoIterator` for `[K]`
note: required by `into_iter`
--> $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL
|
LL | fn into_iter(self) -> Self::IntoIter;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0277`.