Bug 1556261 Comment 71 Edit History

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Weirdly, it looks like this is what broke mail/base/test/browser/browser_mailContext.js on Windows. I backed it out and the error went away. The error message is:
```
Uncaught exception - [Exception... "Component returned failure code: 0x80550013 [nsIMsgFolder.createSubfolder]" nsresult: "0x80550013 (<unknown>)" location: "JS frame :: chrome://mochitests/content/browser/comm/mail/base/test/browser/browser_mailContext.js :: testMessagePane :: line 158" data: no]
```
Weirdly, it looks like this is what broke mail/base/test/browser/browser_mailContext.js on Windows. I backed it out (on Try) and the error went away. The error message is:
```
Uncaught exception - [Exception... "Component returned failure code: 0x80550013 [nsIMsgFolder.createSubfolder]" nsresult: "0x80550013 (<unknown>)" location: "JS frame :: chrome://mochitests/content/browser/comm/mail/base/test/browser/browser_mailContext.js :: testMessagePane :: line 158" data: no]
```

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