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error[E0368]: binary assignment operation `+=` cannot be applied to type `Foo`
--> $DIR/assignment-operator-unimplemented.rs:6:3
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LL | a += *b;
| -^^^^^^
| |
| cannot use `+=` on type `Foo`
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note: an implementation of `AddAssign` might be missing for `Foo`
--> $DIR/assignment-operator-unimplemented.rs:1:1
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LL | struct Foo;
| ^^^^^^^^^^ must implement `AddAssign`
note: the trait `AddAssign` must be implemented
--> $SRC_DIR/core/src/ops/arith.rs:LL:COL
error: aborting due to previous error
For more information about this error, try `rustc --explain E0368`.
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