LTTng » Babeltrace

Program to trigger the bug :
git clone -b test_seek_begin git://git.dorsal.polymtl.ca/~fdeslauriers/babeltrace-api-test/.git

Trace to trigger the bug :
wget http://www.dorsal.polymtl.ca/~fdeslauriers/seek_begin_trace.tar

1. The test program iterate on the events until it reaches a null event(end of the trace).
2. It use a bt_seek_begin position iterator to seek to the beginning of the trace
3. Trying to read the first event returns a null pointer event which cause a segmentation fault when we try to use it.

Workaround :
Use a bt_seek_time with the member u.seek_time set to "0" to move your iterator on the first event.