The same crash also happens if I just do on the main.cpp function:
gSystem->Load("libGQt.so");
Maybe it has something to do with this?
https://sft.its.cern.ch/jira/browse/ROOT-4932
Anyway, I have hacked the code so that I don’t get this segmentation violation, by changing line 4842 of TPad.cxx to:
if (false && gVirtualX->InheritsFrom("TGQt")) {
so that InheritsFrom does not get called.
Anyway, I think a fix should be provided for this issue, or at least a warning.