#4867: ghci displays negative floats incorrectly (was: Incorrect result from
trig
functions)
-------------------------------+--------------------------------------------
Reporter: gwright | Owner: gwright
Type: bug | Status: new
Priority: high | Milestone: 7.0.2
Component: GHCi | Version: 7.0.1
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: MacOS X | Blocking:
Architecture: x86_64 (amd64) | Failure: Incorrect result at runtime
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Comment(by altaic):
Hmm, that's odd... Perhaps someone with better GHC-fu can figure out why
these results are different:
{{{
Prelude GHC.Float> showsPrec 0 (-1.0 :: Double) ""
"--1.0"
Prelude GHC.Float> showSignedFloat showFloat 0 (-1.0 :: Double) ""
"-1.0"
}}}
Given that in `Float.lhs`:
{{{
instance Show Double where
showsPrec x = showSignedFloat showFloat x
showList = showList__ (showsPrec 0)
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4867#comment:31>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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