Warning for incomplete record field label used as function

Consider the following definition:

data Foo = Bar { frob :: Int }
         | Baz { frob :: Int, quux :: Bool }

It would be great if GHC could produce a warning if I use quux as a function somewhere in my code, as calling quux on a Foo constructed with Bar will cause a runtime error. On the other hand, every use of frob is OK.

Currently, to find such problems, I have to first figure out which field labels are incomplete and then search for those, ignoring their uses as a proper field label (in construction or pattern matching).

Trac metadata

Trac field	Value
Version	7.7
Type	FeatureRequest
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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