[GHC] #16331: REGRESSION: --supported-languages lies about supported languages, again

[GHC]

#16331: REGRESSION: --supported-languages lies about supported languages, again
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        Reporter:  hvr               |                Owner:  (none)
            Type:  bug               |               Status:  merge
        Priority:  highest           |            Milestone:  8.8.1
       Component:  Compiler          |              Version:  8.6.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |  https://gitlab.haskell.org/ghc/ghc/merge_requests/383
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Comment (by Marge Bot <ben+marge-bot@…>):

 In [changeset:"ee284b854e514685036dc21a1ee61241c76d14b5/ghc"
 ee284b85/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="ee284b854e514685036dc21a1ee61241c76d14b5"
 Fix regression incorrectly advertising TH support

 `--supported-languages` must only advertise language extensions
 which are supported by the compiler in order for tooling such
 as Cabal relying on this signalling not to behave incorrectly.

 Fixes #16331
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16331#comment:2>
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