HEAD: Validate failure when not TABLES_NEXT_TO_CODE

On powerpc64 validating HEAD I see the following failure:

libraries/ghci/GHCi/InfoTable.hsc:323:20: error: [-Wunused-matches, -Werror=unused-matches]
    Defined but not used: ‘ex_ptr’
    |
323 | pokeConItbl wr_ptr ex_ptr itbl = do
    |                    ^^^^^^
libraries/ghci/ghc.mk:4: recipe for target 'libraries/ghci/dist-install/build/GHCi/InfoTable.o' failed

Patch is coming.

Trac metadata

Trac field	Value
Version	8.5
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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