Calendar-related errors during |make mozmill| test of C-C TB on tryserver.

I am testing my patches for fixing some File I/O issues.

I noticed I experienced errors in OS X build and Windows build during
|make mozmill| tests.
These errors are not observed in my local testing under linux and also
on linux build on tryserver.

I am focusing on Calendar-related issues in my post here.
There are two errors I noticed:

My tryserver log:
https://treeherder.mozilla.org/#/jobs?repo=try-comm-central&revision=c8c1373a5ae6&selectedJob=12322

(1) testLocalCS.js

In a mozmill test called testLocalCS.js,
I am getting the following error on Windows and OS X platforms while
linux shows no such error.

NS_ERROR_XPC_GS_RETURNED_FAILURE

I wonder why.

(2) testTodayPane.js

This file also produced error result.

According to the log, in the early phase, I saw the following lines.
It looks as if the backend interface is not registered or recognized.

Obviously something is wrong.
The following is from windows log, but

 22:33:17     INFO -  [2468] WARNING: This method is lossy. Use
GetCanonicalPath !: file
c:/builds/moz2_slave/tb-try-c-cen-w32-d-00000000000/build/mozilla/xpcom/io/nsLocalFileWin.cpp,
line 3459

 22:33:17     INFO -  1448433197340	addons.xpi-utils	WARN	addMetadata:
Add-on [email protected] is invalid: Error: Invalid addon ID:
expected addon ID [email protected], found
[email protected] in manifest
(resource://gre/modules/addons/XPIProvider.jsm ->
resource://gre/modules/addons/XPIProviderUtils.js:1626:15) JS Stack
trace: [email protected]:1626:15 <
[email protected]:1967:23 <
[email protected]:3614:34 <
[email protected]:2633:25 <
[email protected]:223:12 <
[email protected]:831:5 <
[email protected]:1011:9 <
[email protected]:2788:5 < [email protected]:58:7

 22:33:17     INFO -  1448433197342	addons.xpi-utils	WARN	Could not
uninstall invalid item from locked install location

 22:33:17     INFO -  [2468] ###!!! ASSERTION: must be a file:// url:
'Error', file
c:/builds/moz2_slave/tb-try-c-cen-w32-d-00000000000/build/mozilla/netwerk/base/nsURLHelper.cpp,
line 188

 22:33:17     INFO -  ### Error loading backend: [Exception...
"Component returned failure code: 0x8000ffff (NS_ERROR_UNEXPECTED)
[nsIFileProtocolHandler.getFileFromURLSpec]"  nsresult: "0x8000ffff
(NS_ERROR_UNEXPECTED)"  location: "JS frame ::
jar:file:///C:/slave/test/build/application/thunderbird/extensions/%7Be2fda1a4-762b-4020-b5ad-a41df1933103%7D.xpi!/components/calBackendLoader.js
:: loadBackend :: line 47"  data: no]

 22:33:17     INFO -  JavaScript error:
resource://calendar/modules/calUtils.jsm, line 36: ReferenceError:
__LOCATION__ is not defined

 22:33:17     INFO -  JavaScript error:
resource://calendar/modules/calUtils.jsm, line 36: ReferenceError:
__LOCATION__ is not defined

There is a bugzilla entry filed this past February as follows: but it
seems to deal with a much simpler case of errors. It did not mention
anything about backend failure.

Bug 1130047 - TEST-UNEXPECTED-FAIL |
/builds/slave/test/build/mozmill/testTodayPane.js |
testTodayPane.js::testTodayPane

The latter also saw NS_ERROR_XPC_GS_RETURNED_FAILURE, but it also saw
NS_ERROR_XPC_CI_RETURNED_FAILURE

Something is wrong with XPCOM registration and/or calling, etc.?
But since linux build does not show anything like that, I am a little
puzzled.

Any pointers are appreciated.

TIA

PS: I am testing with the latest C-C source tree.
My local test environment is linux 64-bit.
The local C-C tree was refreshed this morning about an hour ago before
the tryserver submission was done, I think. I tested that the local
compilation succeeded before submitting a job to tryserver.
I don't have OS X or Windows build/test environment locally and so
I need to test my build using tryserver.