[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:
                                     |  thoughtpolice
            Type:  bug               |                  Status:  closed
        Priority:  high              |               Milestone:
       Component:  Compiler          |                 Version:  7.6.1
      Resolution:  worksforme        |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
-------------------------------------+-------------------------------------
Changes (by thomie):

 * status:  infoneeded => closed
 * resolution:   => worksforme
 * milestone:  7.12.1 =>


Comment:

 This issue should be fixed with the switch to the `time` package.

 In commit 08894f96407635781a233145435a78f144accab0:
 {{{
 Author: Ian Lynagh <>
 Date:   Sat Jan 14 17:07:10 2012 +0000

     Switch to using the time package, rather than old-time
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7567#comment:11>
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