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There are lots of Haskell features where adding new instances changes the behavior of existing code. OverlappingInstances is merely the most obvious example, bu

by samth 5y ago

There are lots of Haskell features where adding new instances changes the behavior of existing code. OverlappingInstances is merely the most obvious example, but there are plenty of others.

ebingdom 5y ago
Yes, but they are opt in, right?
- pcwalton 5y ago
  Does not successfully linking count? Because adding an orphan instance can definitely make unrelated code that used to link start failing to.