Just updated to QtCreator 3.1.2 this morning and in the last 4 hours, I have experienced it crash 5 times.

Here is the stack trace:
Check 'General Messages' output pane for details."
0 libclang.so 0x00007fbf8d90f7d2
1 libclang.so 0x00007fbf8d90ebb9
2 libpthread.so.0 0x00007fbfbeb35bb0
3 libQt5Core.so.5 0x00007fbfbf011ef5 QCoreApplication::notifyInternal(QObject*, QEvent*) + 117
4 libQt5Core.so.5 0x00007fbfbf06b9d4 QTimerInfoList::activateTimers() + 1300
5 libQt5Core.so.5 0x00007fbfbf06bc8d
6 libglib-2.0.so.0 0x00007fbfbdd3a3b6 g_main_context_dispatch + 326
7 libglib-2.0.so.0 0x00007fbfbdd3a708
8 libglib-2.0.so.0 0x00007fbfbdd3a7ac g_main_context_iteration + 44
9 libQt5Core.so.5 0x00007fbfbf06c574 QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 100
10 libQt5Core.so.5 0x00007fbfbf01011b QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 203
11 libQt5Core.so.5 0x00007fbfbf014fe5 QCoreApplication::exec() + 133
12 qtcreator 0x0000000000409ada
13 libc.so.6 0x00007fbfbe265de5 __libc_start_main + 245
14 qtcreator 0x000000000040a949
Segmentation fault (core dumped)

This problem was not present with the same configuration with QtCreator 3.1.1.