[llvm-bugs] [Bug 39848] New: clang-cl crashing constantly when compiling Mozilla code

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Nov 30 04:36:51 PST 2018


            Bug ID: 39848
           Summary: clang-cl crashing constantly when compiling Mozilla
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Windows XP
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jorgk at jorgk.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

Sorry, I'm new here. As you know, Mozilla is using clang-cl to compile Firefox
and Thunderbird on Windows. They've switched from MSVC a few months ago.

clang-cl is much faster than MSVC so I've tolerated the occasional compiler
crash that goes away when you compile again.

Last night I update my development environment (mach bootstrap) and that pulled
in some new LLVM version, I believe. Since then, clang-cl is crashing
constantly, so bad that I switched back to MSVC (since after all, I need to
work on code).

Here are the dump files and related sources: https://we.tl/t-KuzTJobRc8

I'm happy to set up a second machine to see whether it crashes there too, but
the development box is back to MSVC for now.

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