[GHC] #12128: ghci cause panic on 8.0.1

[GHC]

#12128: ghci cause panic on 8.0.1
-------------------------------------+-------------------------------------
        Reporter:  zxtx              |                Owner:  seraphime
            Type:  bug               |               Status:  patch
        Priority:  high              |            Milestone:  8.0.2
       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):  Phab:D2374
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"8de6e13f9ef784750e502955fcb38d4a7e179727/ghc"
 8de6e13f/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="8de6e13f9ef784750e502955fcb38d4a7e179727"
 Fix bytecode generator panic

 This fixes #12128.

 The bug was introduced in 1c9fd3f1c5522372fcaf250c805b959e8090a62c.

 Test Plan: ./validate

 Reviewers: simonmar, austin, hvr, simonpj, bgamari

 Reviewed By: bgamari

 Subscribers: simonpj, thomie

 Differential Revision: https://phabricator.haskell.org/D2374

 GHC Trac Issues: #12128
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12128#comment:8>
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