#32053: Tor Browser bundles based on Firefox 68 ESR are not reproducible (LLVM optimization issue) -------------------------------------------------+------------------------- Reporter: gk | Owner: gk Type: defect | Status: | assigned 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 | Parent ID: | Points: Reviewer: | Sponsor: -------------------------------------------------+-------------------------
Comment (by gk): Okay, some good news. Testing with clang 9 + the patch for https://reviews.llvm.org/D70376 gives me reproducible output while without it it does not. Thus, the bug we are chasing seems to got fixed somewhere between 8.0.0 and 9.0.0 (assuming that the https://reviews.llvm.org/D70376 fix is equivalent to Eli's [https://bugs.llvm.org/attachment.cgi?id=22803 backported patch for 8.0.0] which I'll check soon). I'll do another bisecting figuring out which commit actually fixed the issue we hit while still trying pin the exact optimization down that is troubling us. Another good news is that Mozilla seems to be [https://bugs.llvm.org/show_bug.cgi?id=44147 ready to find this kind of bugs, too], and potentially earlier than we from now on so that we hopefully have been dealing with this kind of stuff for the last time. I guess that got solved on Mozilla's side by https://bugzilla.mozilla.org/show_bug.cgi?id=1577212. -- Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32053#comment:50> Tor Bug Tracker & Wiki <https://trac.torproject.org/> The Tor Project: anonymity online
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