[cc'ing random people who may be interested in diagnosing since this is a latent bug, as grepped via chromium-checkins@, feel free to un-cc]

This is causing a lot of transparent retries -> increasing the load on OSX.

It happens often on:
- browser_tests
- unit_tests

It happens on both OSX 10.9 and 10.10.

Server query:
https://chromium-swarm.appspot.com/user/tasks?state=bot_died&limit=100

Example tasks:
https://chromium-swarm.appspot.com/user/task/2e29ebcd9e5ba111
https://chromium-swarm.appspot.com/user/task/2e29ebcd9e5ba112

https://chromium-swarm.appspot.com/user/task/2e29901bb1d54111
https://chromium-swarm.appspot.com/user/task/2e29901bb1d54112

https://chromium-swarm.appspot.com/user/task/2e29623e273de811
https://chromium-swarm.appspot.com/user/task/2e29623e273de812

One of the nice thing is that the retried tasks that failed twice will likely reproduce more easily so it's worth trying these binaries first to try to reproduce locally. Visit a task's page to see the command to retrieve the input files and reproduce on your workstation.


Failure will look like this:
016-04-13 10:08:19.186 unit_tests[21279:507] An uncaught exception was raised
2016-04-13 10:08:19.186 unit_tests[21279:507] Error (268435459) creating CGSWindow on line 263
2016-04-13 10:08:19.186 unit_tests[21279:507] (
	0   CoreFoundation                      0x00007fff907a825c __exceptionPreprocess + 172
	1   unit_tests                          0x000000010532d77b _ZN30chrome_browser_application_mac12_GLOBAL__N_121ExceptionPreprocessorEP11objc_object + 299
	2   libobjc.A.dylib                     0x00007fff858dae75 objc_exception_throw + 43
	3   CoreFoundation                      0x00007fff907a810c +[NSException raise:format:] + 204
	4   AppKit                              0x00007fff88ee7e95 _NSCreateWindowWithOpaqueShape2 + 1403
	5   AppKit                              0x00007fff88ee6a21 -[NSWindow _commonAwake] + 3720
	6   AppKit                              0x00007fff88ef4b63 -[NSWindow _reallyDoOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 1121
	7   AppKit                              0x00007fff88ef4460 -[NSWindow _doOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 786
	8   AppKit                              0x00007fff88ef40e0 -[NSWindow orderWindow:relativeTo:] + 162
	9   unit_tests                          0x000000010503c08b _ZN23FramedBrowserWindowTest5SetUpEv + 155
	10  unit_tests                          0x0000000105c17c7b _ZN7testing4Test3RunEv + 299
	11  unit_tests                          0x0000000105c188ba _ZN7testing8TestInfo3RunEv + 410
	12  unit_tests                          0x0000000105c18e83 _ZN7testing8TestCase3RunEv + 451
	13  unit_tests                          0x0000000105c1f499 _ZN7testing8internal12UnitTestImpl11RunAllTestsEv + 841
	14  unit_tests                          0x0000000105c1f11d _ZN7testing8UnitTest3RunEv + 269
	15  unit_tests                          0x0000000105888da6 _ZN4base9TestSuite3RunEv + 150
	16  unit_tests                          0x00000001058823a9 _ZN4base15LaunchUnitTestsEiPPcRKNS_8CallbackIFivELNS_8internal8CopyModeE1EEE + 137
	17  unit_tests                          0x0000000105c5604e main + 286
	18  unit_tests                          0x0000000103a6eef4 start + 52
)
2016-04-13 10:08:19.187 unit_tests[21279:507] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Error (268435459) creating CGSWindow on line 263'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff907a825c __exceptionPreprocess + 172
	1   unit_tests                          0x000000010532d77b _ZN30chrome_browser_application_mac12_GLOBAL__N_121ExceptionPreprocessorEP11objc_object + 299
	2   libobjc.A.dylib                     0x00007fff858dae75 objc_exception_throw + 43
	3   CoreFoundation                      0x00007fff907a810c +[NSException raise:format:] + 204
	4   AppKit                              0x00007fff88ee7e95 _NSCreateWindowWithOpaqueShape2 + 1403
	5   AppKit                              0x00007fff88ee6a21 -[NSWindow _commonAwake] + 3720
	6   AppKit                              0x00007fff88ef4b63 -[NSWindow _reallyDoOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 1121
	7   AppKit                              0x00007fff88ef4460 -[NSWindow _doOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 786
	8   AppKit                              0x00007fff88ef40e0 -[NSWindow orderWindow:relativeTo:] + 162
	9   unit_tests                          0x000000010503c08b _ZN23FramedBrowserWindowTest5SetUpEv + 155
	10  unit_tests                          0x0000000105c17c7b _ZN7testing4Test3RunEv + 299
	11  unit_tests                          0x0000000105c188ba _ZN7testing8TestInfo3RunEv + 410
	12  unit_tests                          0x0000000105c18e83 _ZN7testing8TestCase3RunEv + 451
	13  unit_tests                          0x0000000105c1f499 _ZN7testing8internal12UnitTestImpl11RunAllTestsEv + 841
	14  unit_tests                          0x0000000105c1f11d _ZN7testing8UnitTest3RunEv + 269
	15  unit_tests                          0x0000000105888da6 _ZN4base9TestSuite3RunEv + 150
	16  unit_tests                          0x00000001058823a9 _ZN4base15LaunchUnitTestsEiPPcRKNS_8CallbackIFivELNS_8internal8CopyModeE1EEE + 137
	17  unit_tests                          0x0000000105c5604e main + 286
	18  unit_tests                          0x0000000103a6eef4 start + 52
)
libc++abi.dylib: terminating with uncaught exception of type NSException
Received signal 6
 [0x0001061128da]
 [0x7fff8c24f5aa]
 [0x000000000000]
 [0x7fff8816bb2e]
 [0x7fff91a11f31]
 [0x7fff91a37952]
 [0x7fff858db30d]
 [0x7fff91a351d1]
 [0x7fff91a34c5b]
 [0x7fff858dafa1]
 [0x7fff907a7e09]
 [0x7fff88ee6b6c]
 [0x7fff88ef4b63]
 [0x7fff88ef4460]
 [0x7fff88ef40e0]
 [0x00010503c08b]
 [0x000105c17c7b]
 [0x000105c188ba]
 [0x000105c18e83]
 [0x000105c1f499]
 [0x000105c1f11d]
 [0x000105888da6]
 [0x0001058823a9]
 [0x000105c5604e]
 [0x000103a6eef4]
[end of stack trace]