[GHC] #12691: Refine the behaviour of -dno-debug-output and -dtrace-level

[GHC]

#12691: Refine the behaviour of -dno-debug-output and -dtrace-level
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        Reporter:  mpickering        |                Owner:
            Type:  task              |               Status:  new
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      Resolution:                    |             Keywords:
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 Ben Gamari <ben@…>):

 In [changeset:"48876ae04c4963f8d5a60a121ac85d52322faaee/ghc" 48876ae/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="48876ae04c4963f8d5a60a121ac85d52322faaee"
 Remove -dtrace-level

 The flag was:

 1. Not documented.
 2. Only used as a boolean flag.
 3. Has overlapping functionality with -dno-debug-output
 4. My poll of #ghc concluded that people didn't know it existed.

 Reviewers: austin, bgamari

 Reviewed By: bgamari

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2627

 GHC Trac Issues: #12691
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12691#comment:2>
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