Open Radar

 
Summary:
When removing a table column, it's tooltip is not removed from the view, and this causes a crash when placing the mouse over the table column header.

As a workaround, you can remove the tooltip before removing the table column (see example code)

Steps to Reproduce:
1. launch build/run attached Xcode project
2. click "add column" (creates a column with a tooltip)
3. click "remove column"
4. place mose where the removed column's header was
5. wait a moment for the tooltip delay


Expected Results:
No tooltip should be presented. No crash.

Actual Results:
Attempts to show a tooltip, but the column has been deallocated and this causes a crash.

If you retain a strong reference to the removed table column, then the tooltip for the removed column will appear. Obviously it shouldn't

Version:
Tested on OS X 10.11.4 (15E65).

We had plenty of crash reports for this bug in older versions of OS X.

Notes:


Configuration:
No special configuration necessary. Just the latest Xcode/OS X.

Attachments:
'tooltip test crash.zip' was successfully uploaded.