[tor-bugs] #19180 [Core Tor/Tor]: Add new compiler warnings

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#19180: Add new compiler warnings
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 Reporter:  nickm         |          Owner:  nickm
     Type:  defect        |         Status:  merge_ready
 Priority:  Medium        |      Milestone:  Tor: 0.2.9.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:  029-proposed  |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Comment (by nickm):

 I've merged bug19180_easy to master.  I'll make new tickets for the
 remaining warnings listed above.

 I do expect that we'll run into at least one surprising warning when
 Jenkins or some unsuspecting users tries to build with some compiler
 version I didn't get to try. We'll fix those as they turn up.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19180#comment:13>
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