[tor-bugs] #26475 [Applications/Tor Browser]: ESR60-based .dmg images are not built reproducibly with Stylo enabled using rustc > 1.25.0

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#26475: ESR60-based .dmg images are not built reproducibly with Stylo enabled using
rustc > 1.25.0
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  Very High                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-rbm, GeorgKoppen201808,          |  Actual Points:
  TorBrowserTeam201808                           |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Changes (by gk):

 * status:  needs_information => new


Comment:

 Not setting `LLVM_RUSTLLVM` does not change things as you expected. So, I
 *could* do the LLVM bisecting with LLVM built during the rust compilation
 to give us a better hint at what is going wrong. However, I'd like to
 avoid that as it's probably a tedious pain in the rear and while the LLVM
 upgrade is triggering the bug it's probably nothing we should fix on the
 LLVM side. I'll think about something smarter and will go back to this bug
 after we got Tor Browser 8 out.

 We might stick to just building LLVM outside of rust for macOS cross-
 compilation for the time being to move around this issue.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26475#comment:37>
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