Filed by: ccoroiu [at] mozilla.com https://treeherder.mozilla.org/logviewer.html#?job_id=138760130&repo=autoland https://queue.taskcluster.net/v1/task/XlKHFP2oRACdntK45SuzSg/runs/0/artifacts/public/test_info//browser-chrome-chunked_errorsummary.log

Starting with 23rd of Nov there are 30 failures. They occur on Windows 7 - debug. A recent log example: https://treeherder.mozilla.org/logviewer.html#?repo=mozilla-inbound&job_id=147608571&lineNumber=7239 And a relevant part of the log where the test failed: 15:28:09 INFO - 225 INFO TEST-START | docshell/test/browser/browser_bug1309900_crossProcessHistoryNavigation.js 7191 15:28:09 INFO - GECKO(4008) | ++DOCSHELL 17B5F400 == 13 [pid = 4008] [id = {7cea4c84-7d16-4408-9c54-0f443478692a}] 7192 15:28:09 INFO - GECKO(4008) | ++DOMWINDOW == 31 (1780A940) [pid = 4008] [serial = 31] [outer = 00000000] 7193 15:28:09 INFO - GECKO(4008) | ++DOMWINDOW == 32 (17B60C00) [pid = 4008] [serial = 32] [outer = 1780A940] 7194 15:28:09 INFO - GECKO(4008) | ++DOMWINDOW == 33 (1DA24400) [pid = 4008] [serial = 33] [outer = 1780A940] 7195 15:28:09 INFO - GECKO(4008) | ++DOMWINDOW == 34 (1DD08000) [pid = 4008] [serial = 34] [outer = 1780A940] 7196 15:28:09 INFO - GECKO(4008) | ++DOMWINDOW == 35 (1DD0EC00) [pid = 4008] [serial = 35] [outer = 1780A940] 7197 15:28:09 INFO - GECKO(4008) | ++DOCSHELL 17B5E000 == 14 [pid = 4008] [id = {3b24a49b-202f-4329-a1c4-80e96c9ef0aa}] 7198 15:28:09 INFO - GECKO(4008) | ++DOMWINDOW == 36 (1DD73160) [pid = 4008] [serial = 36] [outer = 00000000] 7199 15:28:09 INFO - GECKO(4008) | ++DOMWINDOW == 37 (1DD0E400) [pid = 4008] [serial = 37] [outer = 1DD73160] 7200 15:28:12 INFO - GECKO(4008) | --DOCSHELL 10512C00 == 13 [pid = 4008] [id = {f9e36588-186e-475d-9308-d7abbf9a060f}] 7201 15:28:13 INFO - GECKO(4008) | --DOCSHELL 13634800 == 12 [pid = 4008] [id = {0d834ae8-e015-4d77-bbea-12fdf85be248}] 7202 15:28:13 INFO - GECKO(4008) | --DOCSHELL 1476EC00 == 11 [pid = 4008] [id = {0b7a0cb0-c0f4-4a0a-b6af-8bf558f65a1d}] 7203 15:28:13 INFO - GECKO(4008) | --DOCSHELL 1DA21C00 == 10 [pid = 4008] [id = {8816a303-5810-47a3-9c17-496fb0e7b2b4}] 7204 15:28:13 INFO - GECKO(4008) | --DOCSHELL 17B5E000 == 9 [pid = 4008] [id = {3b24a49b-202f-4329-a1c4-80e96c9ef0aa}] 7205 15:28:13 INFO - GECKO(4008) | --DOCSHELL 14776400 == 8 [pid = 4008] [id = {c18987ee-5e14-4ff3-9919-2d65ffe6ff29}] 7206 15:28:13 INFO - GECKO(4008) | --DOCSHELL 15D3D400 == 7 [pid = 4008] [id = {0eff2801-012a-40bc-8c46-b99df6f5dff6}] 7207 15:28:13 INFO - GECKO(4008) | --DOMWINDOW == 36 (1DD73160) [pid = 4008] [serial = 36] [outer = 00000000] [url = about:blank] 7208 15:28:13 INFO - GECKO(4008) | --DOMWINDOW == 35 (1DA42700) [pid = 4008] [serial = 27] [outer = 00000000] [url = http://example.com/] 7209 15:28:17 INFO - GECKO(4008) | --DOMWINDOW == 34 (1051A800) [pid = 4008] [serial = 4] [outer = 00000000] [url = about:blank] 7210 15:28:17 INFO - GECKO(4008) | --DOMWINDOW == 33 (13636C00) [pid = 4008] [serial = 10] [outer = 00000000] [url = about:blank] 7211 15:28:17 INFO - GECKO(4008) | --DOMWINDOW == 32 (15D3EC00) [pid = 4008] [serial = 13] [outer = 00000000] [url = about:blank] 7212 15:28:17 INFO - GECKO(4008) | --DOMWINDOW == 31 (17B60C00) [pid = 4008] [serial = 32] [outer = 00000000] [url = about:blank] 7213 15:28:17 INFO - GECKO(4008) | --DOMWINDOW == 30 (1DA24400) [pid = 4008] [serial = 33] [outer = 00000000] [url = about:about] 7214 15:28:17 INFO - GECKO(4008) | --DOMWINDOW == 29 (1DD0E400) [pid = 4008] [serial = 37] [outer = 00000000] [url = about:blank] 7215 15:28:17 INFO - GECKO(4008) | --DOMWINDOW == 28 (1D585400) [pid = 4008] [serial = 24] [outer = 00000000] [url = about:blank] 7216 15:28:17 INFO - GECKO(4008) | --DOMWINDOW == 27 (1DA22800) [pid = 4008] [serial = 28] [outer = 00000000] [url = http://example.com/] 7217 15:28:17 INFO - GECKO(4008) | --DOMWINDOW == 26 (1D584400) [pid = 4008] [serial = 22] [outer = 00000000] [url = about:blank] 7218 15:28:23 INFO - GECKO(4008) | --DOMWINDOW == 25 (1BBFC160) [pid = 4008] [serial = 19] [outer = 00000000] [url = about:blank] 7219 15:28:23 INFO - GECKO(4008) | --DOMWINDOW == 24 (18AF0820) [pid = 4008] [serial = 23] [outer = 00000000] [url = chrome://mochitests/content/browser/docshell/test/browser/file_bug1206879.html] 7220 15:28:23 INFO - GECKO(4008) | --DOMWINDOW == 23 (161C4160) [pid = 4008] [serial = 12] [outer = 00000000] [url = about:blank] 7221 15:28:23 INFO - GECKO(4008) | --DOMWINDOW == 22 (0E7CBB80) [pid = 4008] [serial = 9] [outer = 00000000] [url = chrome://gfxsanity/content/sanitytest.html] 7222 15:28:23 INFO - GECKO(4008) | --DOMWINDOW == 21 (0FB363A0) [pid = 4008] [serial = 1] [outer = 00000000] [url = chrome://gfxsanity/content/sanityparent.html] 7223 15:28:24 INFO - GECKO(4008) | [4008, Main Thread] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80520012: file z:/build/build/src/dom/fetch/FetchDriver.cpp, line 418 7224 15:28:27 INFO - GECKO(4008) | --DOMWINDOW == 20 (1B1BB800) [pid = 4008] [serial = 20] [outer = 00000000] [url = about:blank] 7225 15:28:27 INFO - GECKO(4008) | --DOMWINDOW == 19 (1DD0EC00) [pid = 4008] [serial = 35] [outer = 00000000] [url = data:text/html,<body%20onunload=''><iframe></iframe></body>] 7226 15:28:27 INFO - GECKO(4008) | --DOMWINDOW == 18 (1D588C00) [pid = 4008] [serial = 26] [outer = 00000000] [url = chrome://mochitests/content/browser/docshell/test/browser/file_bug1206879.html] 7227 15:28:27 INFO - GECKO(4008) | --DOMWINDOW == 17 (1476FC00) [pid = 4008] [serial = 16] [outer = 00000000] [url = about:blank] 7228 15:28:27 INFO - GECKO(4008) | --DOMWINDOW == 16 (146B0C00) [pid = 4008] [serial = 11] [outer = 00000000] [url = chrome://gfxsanity/content/sanitytest.html] 7229 15:28:27 INFO - GECKO(4008) | --DOMWINDOW == 15 (10513800) [pid = 4008] [serial = 2] [outer = 00000000] [url = about:blank] 7230 15:28:27 INFO - GECKO(4008) | --DOMWINDOW == 14 (163EF400) [pid = 4008] [serial = 15] [outer = 00000000] [url = about:blank] 7231 15:29:39 INFO - TEST-INFO | started process screenshot 7232 15:29:39 INFO - TEST-INFO | screenshot: exit 0 7233 15:29:39 INFO - Buffered messages logged at 15:28:09 7234 15:29:39 INFO - 226 INFO Entering test bound runTests 7235 15:29:39 INFO - 227 INFO TEST-PASS | docshell/test/browser/browser_bug1309900_crossProcessHistoryNavigation.js | Check about:about loaded - 7236 15:29:39 INFO - 228 INFO Console message: [JavaScript Error: "The character encoding of the HTML document was not declared. The document will render with garbled text in some browser configurations if the document contains characters from outside the US-ASCII range. The character encoding of the page must be declared in the document or in the transfer protocol." {file: "data:text/html,<body%20onunload=''><iframe></iframe></body>" line: 0}] 7237 15:29:39 INFO - 229 INFO TEST-PASS | docshell/test/browser/browser_bug1309900_crossProcessHistoryNavigation.js | Check data URL loaded - 7238 15:29:39 INFO - Buffered messages finished 7239 15:29:39 ERROR - 230 INFO TEST-UNEXPECTED-FAIL | docshell/test/browser/browser_bug1309900_crossProcessHistoryNavigation.js | Test timed out - 7240 15:29:39 INFO - GECKO(4008) | MEMORY STAT | vsize 747MB | vsizeMaxContiguous 645MB | residentFast 209MB | heapAllocated 77MB 7241 15:29:39 INFO - 231 INFO TEST-OK | docshell/test/browser/browser_bug1309900_crossProcessHistoryNavigation.js | took 90168ms 7242 15:29:39 INFO - GECKO(4008) | ++DOCSHELL 0B211C00 == 8 [pid = 4008] [id = {649af2aa-0008-43c5-b54f-e6294e428ef4}] 7243 15:29:39 INFO - GECKO(4008) | ++DOMWINDOW == 15 (009F33A0) [pid = 4008] [serial = 38] [outer = 00000000] 7244 15:29:39 INFO - GECKO(4008) | ++DOMWINDOW == 16 (0E851C00) [pid = 4008] [serial = 39] [outer = 009F33A0] 7245 15:29:39 INFO - 232 INFO checking window state :overholt, can you please take a look?

Apparently resolved by backout, https://bugzilla.mozilla.org/show_bug.cgi?id=1352497#c49.