Description of problem:
I started FreeCAD-0.15 for the first time and attempted to load a recent file. The project tree was populated but FreeCAD crashed before the object was rendered.

Version-Release number of selected component:
freecad-0.15-1.fc21

Additional info:
reporter:       libreport-2.3.0
backtrace_rating: 4
cmdline:        /usr/bin/FreeCAD
crash_function: SoBase::SoBase
executable:     /usr/lib64/freecad/bin/FreeCAD
kernel:         3.19.5-200.fc21.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000
var_log_messages: [System Logs]:\n-- Logs begin at Thu 2013-03-14 15:00:13 GMT, end at Fri 2015-05-15 14:41:02 BST. --

Truncated backtrace:
Thread no. 1 (10 frames)
 #4 SoBase::SoBase at SoBase.cpp:189
 #5 SoFieldContainer::SoFieldContainer at SoFieldContainer.cpp:124
 #6 SoNode::SoNode at SoNode.cpp:350
 #7 SoBaseColor::SoBaseColor at SoBaseColor.cpp:118
 #8 _wrap_new_SoBaseColor at pivy/coin_wrap.cpp:279401
 #9 call_function at /usr/src/debug/Python-2.7.8/Python/ceval.c:4110
 #10 PyEval_EvalFrameEx at /usr/src/debug/Python-2.7.8/Python/ceval.c:2753
 #11 PyEval_EvalCodeEx at /usr/src/debug/Python-2.7.8/Python/ceval.c:3342
 #12 function_call at /usr/src/debug/Python-2.7.8/Objects/funcobject.c:526
 #13 PyObject_Call at /usr/src/debug/Python-2.7.8/Objects/abstract.c:2529