[GHC] #10183: Warning for redundant constraints: interaction with pattern matching
GHC
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Mon Mar 23 14:08:25 UTC 2015
#10183: Warning for redundant constraints: interaction with pattern matching
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Reporter: simonpj | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.8.4
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture:
Type of failure: None/Unknown | Unknown/Multiple
Blocked By: | Test Case:
Related Tickets: | Blocking:
| Differential Revisions:
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Comment (by goldfire):
Does the fancy new pattern-match completeness checker help out here? Can
GHC record somehow that a constraint is used when the completeness checker
is thinking?
In the meantime, does this mean the flag should be excluded from `-Wall`
for 7.10?
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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10183#comment:2>
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