Description of problem: freecad segfaults on startup

Version-Release number of selected component (if applicable):
freecad-0.15-12.fc24.x86_64

How reproducible:every time

Steps to Reproduce:
1. FreeCAD

Actual results:
Starting program: /usr/bin/FreeCAD 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
FreeCAD 0.15, Libs: 0.15R4671 (Git)
.....
Program received signal SIGSEGV, Segmentation fault.
cc_memalloc_deallocate (allocator=0x3104200042043504, ptr=ptr@entry=0xb6fcd0) at memalloc.cpp:187
187	  newfree->next = allocator->free;
(gdb) where
#0  cc_memalloc_deallocate (allocator=0x3104200042043504, ptr=ptr@entry=0xb6fcd0) at memalloc.cpp:187
#1  0x00007ffff43926b6 in SbHashEntry<short, char const*>::operator delete (ptr=0xb6fcd0) at ../../src/misc/SbHash.h:89
#2  SbHash<short, char const*>::resize (newsize=<optimized out>, this=0xb41050) at ../../src/misc/SbHash.h:322
#3  SbHash<short, char const*>::put (obj=<optimized out>, key=<optimized out>, this=0xb41050) at ../../src/misc/SbHash.h:226
#4  SoType::createType (parent=..., name=..., method=method@entry=0x7ffff4207e60 <SoTransparencyElement::createInstance()>, 
    data=data@entry=0) at SoType.cpp:296
#5  0x00007ffff4207f0b in SoTransparencyElement::initClass () at SoTransparencyElement.cpp:50
#6  0x00007ffff41edc6f in SoElement::initElements () at SoElement.cpp:449
#7  0x00007ffff41eddbf in SoElement::initClass () at SoElement.cpp:517
#8  0x00007ffff437db5e in SoDB::init () at SoDB.cpp:290
#9  0x00007ffff751c011 in Gui::Application::runApplication () at /usr/src/debug/freecad-0.15.4671/src/Gui/Application.cpp:1680
#10 0x00000000004041b0 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/freecad-0.15.4671/src/Main/MainGui.cpp:330
(gdb) p allocator->free
Cannot access memory at address 0x3104200042043504