[GHC] #2249: Undeclared variable in cmm reports as panic

[GHC]

#2249: Undeclared variable in cmm reports as panic
----------------------+-----------------------------------------------------
 Reporter:  millenix  |          Owner:                
     Type:  bug       |         Status:  new           
 Priority:  low       |      Milestone:  6.10 branch   
Component:  Compiler  |        Version:  6.9           
 Severity:  minor     |     Resolution:                
 Keywords:            |     Difficulty:  Unknown       
 Testcase:            |   Architecture:  x86_64 (amd64)
       Os:  Linux     |  
----------------------+-----------------------------------------------------
Changes (by simonmar):

  * priority:  normal => low
  * difficulty:  => Unknown
  * milestone:  => 6.10 branch

Comment:

 I feel I should point out that GHC's .cmm compiler is not really intended
 to be used by anyone but us.  Its diagnostics are terrible, it is almost
 completely undocumented, and we change it freely.

 Anyway, I'll milestone this for 6.10 because we'll be doing a sweep over
 that code.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2249#comment:1>
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