Vaskivo
commented
9 years ago I'm having the same problem. I suspected something iffy going on in PySide's or QT's internals. I ran my program throught gdb until it hanged and here's the backtrace:
0 0x00007ffff0dcc0ac in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
1 0x00007ffff0dca32b in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
2 0x00007ffff0f62a3c in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
3 0x00007ffff0f948b0 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
4 0x00007ffff0f22b46 in QPainter::fillRect(QRectF const&, QBrush const&) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
5 0x00007fffed1b412f in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
6 0x00007fffed10552a in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
7 0x00007fffed0f059b in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
8 0x00007fffed0f080e in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
9 0x00007fffed0f0a0d in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
10 0x00007fffed0d76e9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
11 0x00007fffed0c0cb3 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
12 0x00007fffed132b3f in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
13 0x00007fffed133aaa in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
14 0x00007fffed1324df in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
15 0x00007fffed133bb4 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
16 0x00007fffed01db99 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
17 0x00007fffecc2df22 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
18 0x00007fffecc2e0c3 in QWebFrame::render(QPainter*) () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
19 0x00007fffeded5ea7 in Sbk_QWebFrameFunc_render () from /usr/local/lib/python3.2/dist-packages/PySide/QtWebKit.so
20 0x00000000004b666f in PyEval_EvalFrameEx ()
21 0x00000000004cdee7 in PyEval_EvalCodeEx ()
22 0x00000000004ba764 in PyEval_EvalFrameEx ()
23 0x00000000004ba36e in PyEval_EvalFrameEx ()
24 0x00000000004ba36e in PyEval_EvalFrameEx ()
25 0x00000000004ba36e in PyEval_EvalFrameEx ()
26 0x00000000004cdee7 in PyEval_EvalCodeEx ()
27 0x00000000005464bf in ?? ()
28 0x000000000045420c in PyRun_FileExFlags ()
29 0x000000000045452c in PyRun_SimpleFileExFlags ()
30 0x00000000005587b5 in Py_Main ()
31 0x00000000004616eb in main ()
As you can see, it hangs in QPainter::fillRect().
I think this is a Pyside or QT problem. But I'm open to suggestions on how Ghost or programs using Ghost can go around this problem.
I'm instantiating a ghost object, and then looping through a list of URLs to gather the server header information, and take a screenshot of each URL. However, Ghost will just randomly freeze on a random URL (can change each time). It will completely stop, and you won't even be able to Ctrl+C out of the script, you have to kill -9 it.
Way to re-create, use EyeWitness (based on ghost) at https://github.com/ChrisTruncer/EyeWitness. Then for the file input, just give it like the a top 2000 list or websites from Alexa. It'll work, and then just randomly freezing, without throwing an exception or anything.