Bugs Found
ekmett edited this page Jan 23, 2013
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We keep finding bugs in GHC as we develop lens.
I've started a rogues' gallery here:
- RULES don't apply to a newtype constructor
- Derived Foldable and Traversable instances become extremely inefficient due to eta-expansion
- A strictness bug in
ByteString - GHC doesn't optimize (strict) composition with
id unsafeCoercewithout extensions-
Exciting arity warnings can be triggered by the heavy use of
lensin GHC 7.4.x and below.