[tor-bugs] #32053 [Applications/Tor Browser]: Tor Browser bundles based on Firefox 68 ESR are not reproducible (LLVM optimization issue)

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#32053: Tor Browser bundles based on Firefox 68 ESR are not reproducible (LLVM
optimization issue)
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  Immediate                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Critical                             |     Resolution:
 Keywords:  TorBrowserTeam201911, tbb-9.0-must,  |  Actual Points:
  tbb-9.0-issues, tbb-regression,                |
  tbb-9.0.1-can, GeorgKoppen201911               |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by alexcrichton):

 I just posted a comment on the bug report with a much more minimal test
 case (only a few hundred KB!), it only took many cpu hours to extract :)

 From here I'm still trying to reduce it further to increase the likelihood
 that someone from LLVM can help fix (I'm not so good at LLVM internals).
 This test case is small enough though that it may be pretty reasonable to
 bisect LLVM itself with. Dealing with a bitcode file across that many LLVM
 revisions may be pretty difficult though, so bisection likely won't be
 trivial.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32053#comment:27>
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