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

[GHC]

#7567: invalidateModSummaryCache throws exception if ms_hs_date is 0
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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:                  
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Comment(by edsko):

 Note that this exception may or may not be thrown, depending on the
 timezone (Europe/Dublin works fine for me, UTC or GMT do not, even though
 they come down to the same thing, at least in winter time).

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7567#comment:1>
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