XCB is a single-threaded protocol, and when called from a multi-threaded client application, that client needs to take care that its calls are properly thread-safe. Otherwise, it can trip assertions in the XCB code.
Which would mean this is not really a *bug* in xcb (any more than a syntax error would be a bug in gcc), but that xcb is catching a bug in the client application. Indeed, the assertion error text from xcb spell out the threading issue (or other similar issues commonly hit in code calling xcb_io.c functionality.) However, lots of code is MT and xcb is just too fragile, and the error text makes it look like the crash was in X so these issues tend to get filed against X components rather than investigated as client bugs. But I don't have a good idea what should be done on the X side. We're aware of some upstream work investigating these locking problems: http://article.gmane.org/gmane.comp.freedesktop.xorg.devel/29102 ** Changed in: libx11 (Ubuntu) Importance: Medium => High ** Changed in: libx11 (Ubuntu) Status: Confirmed => Triaged -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libx11 in Ubuntu. https://bugs.launchpad.net/bugs/905686 Title: nautilus assert failure: nautilus: ../../src/xcb_io.c:528: _XAllocID: Assertion `ret != inval_id' failed. To manage notifications about this bug go to: https://bugs.launchpad.net/xlibs/+bug/905686/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
