#4089: Empty Show instance + phantom type + GHCi = out of memory
-------------------------+--------------------------------------------------
Reporter: japple | Owner:
Type: bug | Status: closed
Priority: normal | Milestone:
Component: GHCi | Version: 6.12.2
Resolution: invalid | Keywords:
Difficulty: | Os: Linux
Testcase: | Architecture: x86
Failure: GHCi crash |
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Changes (by igloo):
* status: new => closed
* resolution: => invalid
Comment:
pumpkin is right: The default `Show` instance includes
{{{
show x = shows x ""
showsPrec _ x s = show x ++ s
}}}
and
{{{
shows = showsPrec zeroInt
}}}
So we have
{{{
show M = shows M "" = showsPrec zeroInt M "" = show M ++ ""
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4089#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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