Success! Looks like we've fixed this one. According to our records the fix was applied for EXTJS-7251 in 4.1.4.
  1. #11
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    I too have tiny test app - and that does not have the problem either.

    did you see my earlier post about the change from v.4.0.2a to v4.0.7 ?

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    I've done some more looking into this, I'm not sure why it doesn't crash on other browsers. The references repeat over 5000 times and then the debugger crashes, the merge code has no extra checking for nested references.

    The fix is to use Ext.apply, not merge.
    Evan Trimboli
    Sencha Developer
    Twitter - @evantrimboli
    Don't be afraid of the source code!

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