Oddly enough, I seem to be able to get this to happen 100% consistently
when clicking the final Commit button, when committing project changes
via subversion in the Java-based IntelliJ Idea IDE.

Strange, I know - but since I finally figured it out, I've done it over
and over again as an experiment, and it is 100% reliable. I work in that
IDE all day and make many thousands of UI interactions with it,
including dozens or hundreds of button presses. It always worked
flawlessly in Ubuntu before now, and still does, with exactly this one
exception. That one, specific button in the entire IDE crashes the unity
window decorator every time. I'm talking i.e.:

unity-window-de[2275]: segfault at 318 ip 0000000000415d6f sp
00007fffbcd51af0 error 6 in unity-window-decorator[400000+1b000]

Pressing it via both keyboard shortcut and mouse click trigger it. I
should add, the functioning of the IDE itself is never affected.

The specific - and observable and debuggable - nature of this may
provide a clue as to what is making unity crash.

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https://bugs.launchpad.net/bugs/775430

Title:
  kernel bug: segfault in unity-window-decorator

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