[GHC] #12146: syntax repair suggestion is too eager to suggest TemplateHaskell

[GHC]

#12146: syntax repair suggestion is too eager to suggest TemplateHaskell
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        Reporter:  j.waldmann        |                Owner:
            Type:  feature request   |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #7396             |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by thomie):

 adityadivekar: I pushed the first two patches, but the last one did not
 apply cleanly to HEAD. The testcase also seems unnecessarily complicated
 (I guess you copied it from another test, but I don't understand why this
 hack is necessary):
 {{{
 :set -v1
 System.IO.writeFile "T12146.hs" "module Main where { ipmort Data.Char; }"
 -- hack: avoid the need for sleep by using specific timestamps:
 :! touch -t 01010000 T12146.hs
 :load T12146
 }}}

 Two things are still missing:
 * a simple `compile_fail` test. Use `T4042` as an example.
 * a small comment for `badImplicitSplice` (`compiler/rename/RnSource.hs`),
 explaining why the error messages shouldn't mention `TemplateHaskell`,
 referring to this ticket (#12146).

 If you could, please create a new patch for this, and I'll apply it.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12146#comment:9>
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