#8823: showFloat for higher precision types produces strange results for some values ------------------------------------------------+-------------------------- Reporter: axman6 | Owner: Type: bug | Status: closed Priority: low | Milestone: Component: Prelude | Version: Resolution: invalid | 7.8.1-rc1 Operating System: Unknown/Multiple | Keywords: Type of failure: Incorrect result at runtime | Architecture: Test Case: | Unknown/Multiple Blocking: | Difficulty: | Unknown | Blocked By: | Related Tickets: ------------------------------------------------+-------------------------- Changes (by rwbarton): * status: new => closed * resolution: => invalid Comment: Your `RealFloat` instance is invalid. See the documentation for `decodeFloat`:
If decodeFloat x yields (m,n), then x is equal in value to m*b^n^, where b is the floating-point radix, and furthermore, either m and n are both zero or else '''b^(d-1)^ <= abs m < b^d^, where d is the value of floatDigits x'''.
-- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8823#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler