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+error[E0382]: use of moved value: `blk`
+ --> $DIR/once-cant-call-twice-on-heap.rs:8:5
+ |
+LL | fn foo<F:FnOnce()>(blk: F) {
+ | --- move occurs because `blk` has type `F`, which does not implement the `Copy` trait
+LL | blk();
+ | ----- `blk` moved due to this call
+LL | blk();
+ | ^^^ value used here after move
+ |
+note: this value implements `FnOnce`, which causes it to be moved when called
+ --> $DIR/once-cant-call-twice-on-heap.rs:7:5
+ |
+LL | blk();
+ | ^^^
+help: consider further restricting this bound
+ |
+LL | fn foo<F:FnOnce() + Copy>(blk: F) {
+ | ++++++
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0382`.