[GHC] #10608: Compile error regression from GHC 7.10 to 7.11

[GHC]

#10608: Compile error regression from GHC 7.10 to 7.11
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        Reporter:  hvr               |                   Owner:  simonpj
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.11
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Other             |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by hvr):

 Replying to [comment:1 simonpj]:
 > I'll just reverse the change, which is easy to do.  Two people have
 complained about the new behaviour and I don't think anyone complained
 about the old!

 Please don't count me yet as complaining... but rather as wondering :-)

 The new error message hint
 {{{
 Could not deduce (IsString [t]) arising from the literal ‘""’
 }}}
 is provides some additional information the previous message didn't. The
 only downside of the new message is that it doesn't also give the hint of
 what an explicit type-sig would look like or that `FlexibleContexts` may
 let GHC continue)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10608#comment:2>
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