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Rollup merge of #88578 - notriddle:notriddle/suggest-add-reference-to-for-loop-iter, r=nagisa

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fix(rustc): suggest `items` be borrowed in `for i in items[x..]`

Fixes #87994
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Manish Goregaokar 2021-09-10 08:23:18 -07:00 • committed by GitHub
commit 257f5adf0e
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4 changed files with 105 additions and 6 deletions
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7
src/test/ui/issues/issue-20605.stderr
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@ -2,9 +2,12 @@ error[E0277]: the size for values of type `dyn Iterator<Item = &'a mut u8>` cann
--> $DIR/issue-20605.rs:2:17
|
LL | for item in *things { *item = 0 }
| ^^^^^^^ doesn't have a size known at compile-time
| ^^^^^^^
| |
| expected an implementor of trait `IntoIterator`
| help: consider mutably borrowing here: `&mut *things`
|
= help: the trait `Sized` is not implemented for `dyn Iterator<Item = &'a mut u8>`
= note: the trait bound `dyn Iterator<Item = &'a mut u8>: IntoIterator` is not satisfied
= note: required because of the requirements on the impl of `IntoIterator` for `dyn Iterator<Item = &'a mut u8>`
note: required by `into_iter`
--> $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL