diff options
Diffstat (limited to 'src/test/ui/borrowck/suggest-as-ref-on-mut-closure.stderr')
| -rw-r--r-- | src/test/ui/borrowck/suggest-as-ref-on-mut-closure.stderr | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/suggest-as-ref-on-mut-closure.stderr b/src/test/ui/borrowck/suggest-as-ref-on-mut-closure.stderr new file mode 100644 index 000000000..af26169c8 --- /dev/null +++ b/src/test/ui/borrowck/suggest-as-ref-on-mut-closure.stderr @@ -0,0 +1,31 @@ +error[E0507]: cannot move out of `*cb` which is behind a mutable reference + --> $DIR/suggest-as-ref-on-mut-closure.rs:7:5 + | +LL | cb.map(|cb| cb()); + | ^^^-------------- + | | | + | | `*cb` moved due to this method call + | move occurs because `*cb` has type `Option<&mut dyn FnMut()>`, which does not implement the `Copy` trait + | +note: this function takes ownership of the receiver `self`, which moves `*cb` + --> $SRC_DIR/core/src/option.rs:LL:COL + | +LL | pub const fn map<U, F>(self, f: F) -> Option<U> + | ^^^^ +help: consider calling `.as_ref()` to borrow the type's contents + | +LL | cb.as_ref().map(|cb| cb()); + | +++++++++ + +error[E0596]: cannot borrow `*cb` as mutable, as it is behind a `&` reference + --> $DIR/suggest-as-ref-on-mut-closure.rs:12:26 + | +LL | cb.as_ref().map(|cb| cb()); + | -- ^^ `cb` is a `&` reference, so the data it refers to cannot be borrowed as mutable + | | + | consider changing this binding's type to be: `&mut &mut dyn FnMut()` + +error: aborting due to 2 previous errors + +Some errors have detailed explanations: E0507, E0596. +For more information about an error, try `rustc --explain E0507`. |