#3125: TcTyFuns.flattenType: unexpected PredType
------------------------------+---------------------------------------------
Reporter: guest | Owner:
Type: bug | Status: closed
Priority: normal | Milestone:
Component: Compiler | Version: 6.10.1
Severity: normal | Resolution: fixed
Keywords: | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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Changes (by chak):
* status: new => closed
* resolution: => fixed
Comment:
This has already been fixed in the 6.11, which fails to load the
declaration with
{{{
/Users/chak/Code/haskell/main.hs:4:0:
Illegal polymorphic or qualified type: (Num y) => y
In the type synonym instance declaration for `Garbage'
}}}
Given that we already have an RC for 6.10.2, I think, it's too late to
fiddle with the type checker just to get a better error message (and risk
breaking something else along the way).
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3125#comment:1>
GHC <http://www.haskell.org/ghc/>
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