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bug#1435: C-Click on a mode in the mode-line causes crash in MacOS X

From: Jason Schadel
Subject: bug#1435: C-Click on a mode in the mode-line causes crash in MacOS X
Date: Mon, 2 Feb 2009 10:50:13 -0500

I do have a Kensington Expert Mouse with their ancient Mouseworks software installed. I wouldn't be surprised if that is the problem.

No more crashes with your update.  Here are the results:
<mode-line> <C-mouse-1> is undefined
mode-line down-mouse-3- shows the minor-mode menu
mode-line down-mouse-1- shows the mode menu


On Jan 23, 2009, at 5:32 AM, Adrian Robert wrote:

I still cannot reproduce it. The only clue I can find is that the crash seems to be deep inside OS X's own menu code, when it apparently tries to send a selection to -[EmacsView writeSelectionToPasteboard:types:]. This should only occur if a native services menu selection is made, however for Emacs.app we override the services menu with our own items, so any selection from the actual visible services menu goes through ns-perform-service.

In your case, it seems doing your mouse action is somehow triggering a call into the (hidden and overridden) original services menu. Do you know why this might be? Do you have anything unusual running on your Mac, such as something that automatically is active when a selection is made or a menu item chosen, or a certain type of mouse- click made, or something like that?

Anyway, I have checked in something that might at least avoid the crash for now, it simply stubs out the methods in question:

-writeSelectionToPasteboard:types: and -readSelectionFromPasteboard:

Let me know if this stops the crash, and if so, if any behavior that is normally expected (in connection with this behind-the-scenes service call if you know what it is) is not observed.


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