as a note, this test case fails sometimes on linux64 (non e10s) when run by itself. That should help make it easier to debug this failure.
Kris, this looks like the exact same thing we were seeing on bug 1309880, which was having intermittent issues on Linux debug. When looking at the log one can see that the test file starts, then there's a whole bunch of debug output spanning many seconds, after which the first test in the file starts executing. We were unable to figure out what was happening for bug 1309880, but if this symptom is also presenting here then it is unlikely related directly to bug 1309880. I also saw this when trying to land bug 1308058, but at that time assumed that it was related to bug 1309880 which was a dependency for bug 1308058. Do you mind taking a look to see if you have any idea what might be causing this?
https://hg.mozilla.org/integration/mozilla-inbound/rev/63120fccd9a26e9118c6a9d1c99777f6f39fa0a8 Bug 1315769, 1308416: Request longer timeouts for tests that can't be split up.
https://hg.mozilla.org/integration/mozilla-inbound/rev/6bf41608a192873d72639a0e58450f3f14036f46 Bug 1308416: Un-request longer timeout for browser_ext_windows_create, since the last failure was before it was split up.
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → FIXED
Version: unspecified → 52 Branch
status-firefox51: --- → unaffected
status-firefox52: --- → fixed
status-firefox53: --- → fixed
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