#3877: XOverlappingInstances flag not working
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Reporter: traz161616 | Owner:
Type: feature request | Status: closed
Priority: normal | Milestone: 6.14.1
Component: Compiler (Type checker) | Version: 6.12.1
Resolution: wontfix | Keywords: XOverlappingInstances
Testcase: | Blockedby:
Difficulty: | Os: Linux
Blocking: | Architecture: x86_64 (amd64)
Failure: GHC rejects valid program |
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Changes (by igloo):
* status: new => closed
* type: bug => feature request
* resolution: => wontfix
Comment:
The key point is that the `(a,b)` instance in the prelude would need to be
compiled with overlapping instances enabled, in order for this to be
accepted.
No-one else has commented in 6 months, and it's not clear that fixing it
would be better than the status quo, so I'm closing this as wontfix.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3877#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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