[GHC] #8796: -ddump-splices prints to error stream

[GHC]

#8796: -ddump-splices prints to error stream
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              Reporter:  jstolarek   |            Owner:
                  Type:  bug         |           Status:  new
              Priority:  normal      |        Milestone:
             Component:  Compiler    |          Version:  7.9
            Resolution:              |         Keywords:  newcomer
      Operating System:              |     Architecture:  Unknown/Multiple
  Unknown/Multiple                   |       Difficulty:  Easy (less than 1
       Type of failure:              |  hour)
  None/Unknown                       |       Blocked By:
             Test Case:              |  Related Tickets:
              Blocking:              |
Differential Revisions:              |
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Comment (by jstolarek):

 Similarly, `-dverbose-core2core` prints some information on stdout and
 some on stderr. This could also be cleaned up.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8796#comment:6>
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