[commit: ghc] wip/T14677's head updated: WIP: triggering CI for Simon's patch (6546344)

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Repository : ssh://git@git.haskell.org/ghc

Branch 'wip/T14677' now includes:

     6b1ff00 Fix references to cminusminus.org
     1e14fd3 Inform hole substitutions of typeclass constraints (fixes  #14273).
     8bb150d Revert "Fix regression on i386 due to get/setAllocationCounter change"
     e1d4140 Revert "Improve accuracy of get/setAllocationCounter"
     3335811 cmm: Include braces on default branch as required by the parser
     2a78cf7 Remove unused extern cost centre collection
     575c009 Fix #14681 and #14682 with precision-aimed parentheses
     6546344 WIP: triggering CI for Simon's patch