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authorEsteban Küber <esteban@kuber.com.ar>2025-07-20 03:15:20 +0000
committerEsteban Küber <esteban@kuber.com.ar>2025-07-25 18:34:10 +0000
commit11061831f703fdb5d05816860368e4b9ab4edee7 (patch)
tree9a1519ef8767184a5a4fef79c7f9d87afc2e1ff7 /tests/ui/closures
parenta955f1cd09a027363729ceed919952d09f76f28e (diff)
downloadrust-11061831f703fdb5d05816860368e4b9ab4edee7.tar.gz
rust-11061831f703fdb5d05816860368e4b9ab4edee7.zip
Mention type that could be `Clone` but isn't in more cases
When encountering a moved value of a type that isn't `Clone` because of unmet obligations, but where all the unmet predicates reference crate-local types, mention them and suggest cloning, as we do in other cases already:

```
error[E0507]: cannot move out of `foo`, a captured variable in an `Fn` closure
  --> f111.rs:14:25
   |
13 | fn do_stuff(foo: Option<Foo>) {
   |             --- captured outer variable
14 |     require_fn_trait(|| async {
   |                      -- ^^^^^ `foo` is moved here
   |                      |
   |                      captured by this `Fn` closure
15 |         if foo.map_or(false, |f| f.foo()) {
   |            ---
   |            |
   |            variable moved due to use in coroutine
   |            move occurs because `foo` has type `Option<Foo>`, which does not implement the `Copy` trait
   |
note: if `Foo` implemented `Clone`, you could clone the value
  --> f111.rs:4:1
   |
4  | struct Foo;
   | ^^^^^^^^^^ consider implementing `Clone` for this type
...
15 |         if foo.map_or(false, |f| f.foo()) {
   |            --- you could clone this value
```
Diffstat (limited to 'tests/ui/closures')
-rw-r--r--tests/ui/closures/2229_closure_analysis/match/if-let-guards-errors.e2018.stderr9
-rw-r--r--tests/ui/closures/2229_closure_analysis/match/if-let-guards-errors.e2021.stderr9
2 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/closures/2229_closure_analysis/match/if-let-guards-errors.e2018.stderr b/tests/ui/closures/2229_closure_analysis/match/if-let-guards-errors.e2018.stderr
index 394629c0001..057960ec014 100644
--- a/tests/ui/closures/2229_closure_analysis/match/if-let-guards-errors.e2018.stderr
+++ b/tests/ui/closures/2229_closure_analysis/match/if-let-guards-errors.e2018.stderr
@@ -26,6 +26,15 @@ LL |             E::Number(_) if let E::String(s) = *value => { }
 ...
 LL |     let x = value;
    |             ^^^^^ value used here after move
+   |
+note: if `E` implemented `Clone`, you could clone the value
+  --> $DIR/if-let-guards-errors.rs:32:1
+   |
+LL |             E::Number(_) if let E::String(s) = *value => { }
+   |                                                ------ you could clone this value
+...
+LL | enum E {
+   | ^^^^^^ consider implementing `Clone` for this type
 
 error: aborting due to 2 previous errors
 
diff --git a/tests/ui/closures/2229_closure_analysis/match/if-let-guards-errors.e2021.stderr b/tests/ui/closures/2229_closure_analysis/match/if-let-guards-errors.e2021.stderr
index 5672845019b..4a6e3908827 100644
--- a/tests/ui/closures/2229_closure_analysis/match/if-let-guards-errors.e2021.stderr
+++ b/tests/ui/closures/2229_closure_analysis/match/if-let-guards-errors.e2021.stderr
@@ -26,6 +26,15 @@ LL |             E::Number(_) if let E::String(s) = *value => { }
 ...
 LL |     let x = value;
    |             ^^^^^ value used here after move
+   |
+note: if `E` implemented `Clone`, you could clone the value
+  --> $DIR/if-let-guards-errors.rs:32:1
+   |
+LL |             E::Number(_) if let E::String(s) = *value => { }
+   |                                                ------ you could clone this value
+...
+LL | enum E {
+   | ^^^^^^ consider implementing `Clone` for this type
 
 error: aborting due to 2 previous errors