No non-exhaustive pattern match warning given for empty case analysis
I would expect GHC to warn of a non-exhaustive pattern match at compile-time when faced with this,
{-# LANGUAGE EmptyCase #-}
module Test where
test :: Bool -> Int
test a = case a of
Yet it happily accepts this without complaint. If one attempts to evaluate, e.g., test True
the expected "Non-exhaustive patterns in case" error is thrown at runtime.
Trac metadata
Trac field | Value |
---|---|
Version | 7.10.2 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | edsko |
Operating system | |
Architecture |