On: Do Not Type "File:///" in OS X

[antics]

The cause of this bug seems to be the OSX system spell checker; I've crashed a few applications to take a look at the dumps, and so far they common point of failure seems to be that they all have some call to something like `NSSpellChecker`.

In the OP for example:

    6   AppKit                              0x00007fff921dbd1a checkDataDetectors + 536
    7   AppKit                              0x00007fff921d9429 NSSpellCheckerCheckString + 13334
    8   AppKit                              0x00007fff921d5f9f -[NSTextCheckingOperation main] + 152

    7   AppKit                              0x00007fff921d9429 NSSpellCheckerCheckString + 13334

This explanation makes sense to me because the spell checker is integrated very tightly into the user-facing text entry experience across the board in OSX. It is one of the few bits of code that could explain reliable failures across applications that we've been seeing.

[sgt → antics]

I've disabled the spell checker a long time ago, but it still happens. So NSSpellCheckCheckString is still being invoked even though the spell check is not running.