all-missed-specializations doesn't suggest warning

-Weverything turns on -Wall-missed-specializations. When most warnings print, they say, e.g.,

warning: [-Wincomplete-uni-patterns]

which is helpful because I can then easily suppress all warnings of that type with an -fno-warn-*. But missed specializations do not show the warning flag:

Foo.hs: warning:
    Could not specialise imported function `foo'
    Probable fix: add INLINABLE pragma on `foo'

There is no indication of what warning flag triggered the warning.

Trac metadata

Trac field	Value
Version	8.6.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	low
Resolution	Unresolved
Component	Compiler
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