[GHC] #13446: Deferred type error sneaks in with -fno-defer-type-errors enabled
GHC
ghc-devs at haskell.org
Sun Mar 19 00:05:59 UTC 2017
#13446: Deferred type error sneaks in with -fno-defer-type-errors enabled
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Reporter: RyanGlScott | Owner: (none)
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler (Type | Version: 8.0.2
checker) |
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture:
Type of failure: GHC accepts | Unknown/Multiple
invalid program | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s):
Wiki Page: |
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Changes (by dfeuer):
* cc: dfeuer (added)
Comment:
That commit was never entirely satisfactory, as it hit the problem with a
hammer instead of (IIRC) trying to distinguish between insoluble
constraints in positive and negative position. Or something like that.
Whether that relates to the problem here I couldn't say.
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13446#comment:3>
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