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

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#26475: ESR60-based Tor Browser bundles are not built reproducibly with Stylo
enabled using rustc > 1.25.0
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  Immediate                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-rbm, TorBrowserTeam201810R,      |  Actual Points:
  GeorgKoppen201810                              |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by gk):

 Replying to [comment:48 gk]:
 > I made some testbuilds and tested the compiler against the adapted
 script from https://github.com/rust-
 lang/rust/issues/52044#issuecomment-402349038 and I got matching builds
 and the script is happy now.

 FWIW: I am actually not sure if I solved #27937 with the patch as I was
 never able to reproduce the Linux issue. Looking at the diff my best guess
 is that it might not be `panic` but still LTO related. And the idea is to
 have the patch up for review squash both cases.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26475#comment:49>
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