src/test/ui/issues/issue-6738.stderr

   1 error[E0368]: binary assignment operation `+=` cannot be applied to type `T`
   2   --> $DIR/issue-6738.rs:6:9
   3    |
   4 LL |         self.x += v.x;
   5    |         ------^^^^^^^
   6    |         |
   7    |         cannot use `+=` on type `T`
   8    |
   9 help: consider restricting type parameter `T`
  10    |
  11 LL | impl<T: std::ops::AddAssign> Foo<T> {
  12    |       +++++++++++++++++++++
  13
  14 error: aborting due to previous error
  15
  16 For more information about this error, try `rustc --explain E0368`.