#8542: Suggest NegativeLiterals -------------------------------------+------------------------------------- Reporter: monoidal | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 7.7 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: | numeric/should_fail/T8542 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by monoidal): Originally, we were giving this warning both to `128 :: Word8` and `-128 :: Word8`. In #13257 the code was modified to recognize the pattern `negate (fromIntegral x)`. I guess that HPC is modifying to code to be able to check for coverage of both the whole expression `negate (fromInteger x)` and the subexpression `fromInteger x`, and this causes the warning not to appear. Nothing to worry, I would just skip the test with this way. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8542#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler