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Check known-key lists

I noticed that fmap (for example) has a known key

fmapName = varQual gHC_BASE    (fsLit "fmap")    fmapClassOpKey
fmapClassOpKey                = mkPreludeMiscIdUnique 173

but its RdrName doesn't refer to it.

fmap_RDR                = varQual_RDR gHC_BASE (fsLit "fmap")

Is there a reason for this? If not, it seems likely that we could get a bit of a speed-up by using fmapName here. We may also consider making liftA2 known-key for Traversable deriving.

Trac metadata
Trac field Value
Version 8.1
Type Bug
TypeOfFailure OtherFailure
Priority normal
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
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