[MacPorts] #29223: if an install is interrupted, a later install of the same package can fail if version number has since changed.

[MacPorts]

#29223: if an install is interrupted, a later install of the same package can fail
if version number has since changed.
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 Reporter:  rogerdpack@…          |       Owner:  macports-tickets@…                   
     Type:  defect                |      Status:  new                                  
 Priority:  Normal                |   Milestone:                                       
Component:  base                  |     Version:  1.9.2                                
 Keywords:                        |        Port:                                       
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Comment(by snc@…):

 Replying to [comment:2 ryandesign@…]:
 > Of course, but I'm not seeing how it was possible for you to get into
 this situation. If, between the first and second attempt, you ran "sudo
 port sync", and the version of m4 was changed by this sync, then the m4
 portfile was updated. Next time you tried to build m4, MacPorts would have
 noticed the portfile was newer than your build attempt, and thrown out the
 previous build attempt. So I cannot explain why it did not do so.

 Does this problem manifest only when using the ports tarball and not
 Portfiles? I'm wondering if the timestamps only get checked properly in
 one case and not the other.

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Ticket URL: <https://trac.macports.org/ticket/29223#comment:50>
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