When I run mochitest on Windows with ASan: $ ASAN_SYMBOLIZER_PATH=/c/w/tools/clang/x64/bin/llvm-symbolizer.exe ./mach mochitest I got this error everywhere: dir: accessible/tests/browser Increasing default timeout to 90 seconds on ASAN mozprofile.addons WARNING | Could not install c:\w\fx\mc\obj-asan\_tests\testing\mochitest\extensions\mozscreenshots: [Errno 2] No such file or directory: 'c:\\w\\fx\\mc\\obj-asan\\_tests\\testing\\mochitest\\extensions\\mozscreenshots\\install.rdf' ================================================================= AddressSanitizer: nested bug in the same thread, aborting. 1 ERROR TEST-UNEXPECTED-FAIL | runtests.py | Certificate integration failed Buffered messages finished It's because the certutil call: https://dxr.mozilla.org/mozilla-central/rev/048240a074e841c425a4da4707cf8e353074ec1d/testing/mochitest/runtests.py#1603 returns 3, this does not happen on Linux.

Ting, do you still get this error? I wasn't able to reproduce on my machine; certutil returned 0 and the tests started running. I was using a fresh LLVM from a few hours ago, if that makes a difference.

I still get this error with the binaries I built from r286542. I'll update my test result with the latest LLVM later, thanks for the information!

Like what :dmajor said, I can't reproduce the error with the latest LLVM r292767 and m-c https://hg.mozilla.org/mozilla-central/rev/bd0cd9af94d9.

Running mochitests on Try now has the same error message: https://treeherder.mozilla.org/logviewer.html#?job_id=107228936&repo=try&lineNumber=1645 07:34:46 INFO - TEST-SKIP | accessible/tests/mochitest/tree/test_applicationacc.xul | took 0ms 07:34:46 INFO - mozprofile.addons WARNING | Could not install Z:\task_1497511817\build\tests\mochitest\extensions\mozscreenshots: [Errno 2] No such file or directory: 'Z:\\task_1497511817\\build\\tests\\mochitest\\extensions\\mozscreenshots\\install.rdf' 07:34:46 INFO - INFO | runtests.py | ASan using symbolizer at Z:\task_1497511817\build\application\firefox\llvm-symbolizer.exe 07:34:47 INFO - INFO | runtests.py | ASan running in default memory configuration 07:34:47 ERROR - 0 ERROR TEST-UNEXPECTED-FAIL | runtests.py | Certificate integration failed 07:34:47 INFO - Buffered messages finished 07:34:47 INFO - SUITE-END | took 0s

(In reply to Ting-Yu Chou [:ting] from comment #4) > Running mochitests on Try now has the same error message: Weird, I can't reproduce locally with the latest m-c and LLVM r293859.

Actually it returns 0xc0000142, filed bug 1373562.