[GHC] #12035: hs-boot knot tying insufficient for ghc --make

[GHC]

#12035: hs-boot knot tying insufficient for ghc --make
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        Reporter:  ezyang            |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler (Type    |              Version:  8.1
  checker)                           |             Keywords:  hs-boot
      Resolution:                    |  backpack
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by simonpj):

 I don't understand.  In `--make` mode, doesn't `GhcMake.typecheckLoop` re-
 typecheck all the modules that depended on the `hs-boot` file?  Isn't that
 precisely what `typecheckLoop` is for?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12035#comment:1>
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