[GHC] #7567: invalidateModSummaryCache throws exception if ms_hs_date is 0

[GHC]

#7567: invalidateModSummaryCache throws exception if ms_hs_date is 0
-----------------------------+----------------------------------------------
Reporter:  edsko             |          Owner:                  
    Type:  bug               |         Status:  new             
Priority:  normal            |      Component:  Compiler        
 Version:  7.6.1             |       Keywords:                  
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
 Failure:  None/Unknown      |      Blockedby:                  
Blocking:                    |        Related:                  
-----------------------------+----------------------------------------------

Comment(by edsko):

 Incidentally, the exception is an error, so it is only thrown when
 ms_hs_date is forced (ModSummary does not use strict fields).

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7567#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler