[GHC] #10236: DWARF unwind info is broken

[GHC]

#10236: DWARF unwind info is broken
-------------------------------------+-------------------------------------
              Reporter:              |             Owner:
  thoughtpolice                      |            Status:  new
                  Type:  bug         |         Milestone:  7.10.2
              Priority:  high        |           Version:  7.10.1
             Component:  Compiler    |  Operating System:  Unknown/Multiple
  (Debugging)                        |   Type of failure:  Incorrect result
              Keywords:  dwarf       |  at runtime
          Architecture:              |        Blocked By:
  Unknown/Multiple                   |   Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:  Phab:D792   |
-------------------------------------+-------------------------------------
 As reported by `bitonic` and `petermw` on `#ghc` (April 2nd):

 {{{
 07:02 < bitonic> I'm trying to get a meaningful backtrace with DWARF,
 using
                  <https://ghc.haskell.org/trac/ghc/wiki/DWARF> as a guide.
 however, all I get is
                  `Backtrace stopped: previous frame identical to this
 frame (corrupt stack?)`
 07:03 < bitonic> I've re-built GHC 7.10.1 using `GhcRtsHcOpts += -g` and
 `GhcLibHcOpts += -g`, even if
                  I'm not sure it's even necessary
 07:04 < bitonic> are there any additional steps I should take?  or any way
 to make sure that the binary
                  I'm generating is sane?
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10236>
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