#7384: Panic "ctEvTerm" when using functional dependencies and PolyKinds
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Reporter: goldfire | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.7 | Keywords: FunctionalDependencies
PolyKinds
Os: Unknown/Multiple | Architecture: Unknown/Multiple
Failure: None/Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Comment(by simonpj@…):
commit 545bb79667ebcbf5e776f76518cf68b4d507e7f5
{{{
Author: Simon Peyton Jones <simo...@microsoft.com>
Date: Tue Nov 6 16:12:39 2012 +0000
Refine the "kick-out" predicate for CTyVarEq
Consider
Work item: k ~ *
Inert item: (a::k) ~ Int
Then we must kick out the inert item! We weren't doing that,
something I discovered when fixing Trac #7384.
Discussed with Dimitrios, and we wrote a long comment
Note [Delicate equality kick-out] to explain.
compiler/typecheck/TcInteract.lhs | 67
+++++++++++++++++++++---------------
1 files changed, 39 insertions(+), 28 deletions(-)
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7384#comment:1>
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