[GHC] #10320: -ddump-to-file should create empty dump files when there was nothing to dump

[GHC]

#10320: -ddump-to-file should create empty dump files when there was nothing to
dump
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        Reporter:  rwbarton          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  7.10.1
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1514
       Wiki Page:                    |
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Comment (by thomie):

 commit c5597bb6da612e0578290c3bccdac089d6519e19
 {{{
 Author: Ben Gamari <ben at smart-cactus.org>
 Date:   Thu Dec 3 14:59:18 2015 +0100

     Revert "Create empty dump files when there was nothing to dump"

     This reverts commit 8cba907ad404ba4005558b5a8966390159938172 which
     broke `-ddump-to-file`.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10320#comment:13>
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