[GHC] #15570: Core transformations generate bad indexCharOffAddr# call

[GHC]

#15570: Core transformations generate bad indexCharOffAddr# call
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        Reporter:  alpmestan         |                Owner:  alpmestan
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.5
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #15286            |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by hsyl20):

 @[comment:11 alpmestan]: the
 [https://github.com/snowleopard/hadrian/blob/a820566c16e1945b02632e68bd54cc351f562ebc/src/Settings/Packages.hs#L35
 workaround in Hadrian] for #15286 is a bit wrong: you should only have to
 pass `-fno-omit-interface-pragmas` and `-fno-ignore-interface-pragmas`,
 not `-O0`. Last time I checked (cf Phab:D4880), it was enough to fix the
 "quickest" build.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15570#comment:13>
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