#5074: GHCi-7 not importing (some?) re-exported instances
---------------------------------+------------------------------------------
Reporter: lpsmith | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.0.3 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Using {{{import Module}}} from the ghci prompt fails to bring some
instances into scope. On the other hand, {{{:m +Module}}} does not
appear to have this issue.
{{{
$ ghci
GHCi, version 7.0.1: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
ghci> import Data.Time
ghci> show `fmap` getCurrentTime
<interactive>:1:1:
No instance for (Show UTCTime)
arising from a use of `show'
Possible fix: add an instance declaration for (Show UTCTime)
In the first argument of `fmap', namely `show'
In the expression: show `fmap` getCurrentTime
In an equation for `it': it = show `fmap` getCurrentTime
(0.09 secs, 9682112 bytes)
ghci> :q
Leaving GHCi.
$ ghci
GHCi, version 7.0.1: http://www.haskell.org/ghc/ :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... done.
Loading package ffi-1.0 ... linking ... done.
ghci> :m +Data.Time
ghci> show `fmap` getCurrentTime
Loading package old-locale-1.0.0.2 ... linking ... done.
Loading package time-1.2.0.3 ... linking ... done.
"2011-04-01 17:41:21.108154 UTC"
ghci>
}}}
Tested on 7.0.1, 7.0.2, and 7.0.3
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5074>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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