Core was generated by `gnome-shell --display-server --wayland'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  js::GetObjectClass (obj=<optimized out>) at ./js/src/jsfriendapi.h:593

warning: Source file is more recent than executable.
593         return reinterpret_cast<const shadow::Object*>(obj)->group->clasp;
[Current thread is 1 (Thread 0xb1519870 (LWP 11224))]
(gdb) bt
#0  js::GetObjectClass (obj=<optimized out>) at ./js/src/jsfriendapi.h:593
#1  js::IsProxy (obj=<optimized out>) at ../../dist/include/js/Proxy.h:421
#2  js::IsWrapper (obj=0x80) at ./js/src/jswrapper.h:226
#3  JSObject::is<js::WrapperObject> (this=0x80) at ./js/src/vm/WrapperObject.h:35
#4  js::EmulatesUndefined (obj=0x80) at ./js/src/jsboolinlines.h:20
#5  js::ToBooleanSlow (v=..., v@entry=...) at ./js/src/jsbool.cpp:170
#6  0xb5640e2e in JS::ToBoolean (v=...) at ../../dist/include/js/Conversions.h:113
#7  js::PropDesc::initialize (this=this@entry=0xbec410c0, cx=cx@entry=0x280d18, origval=..., checkAccessors=checkAccessors@entry=true) at ./js/src/jsobj.cpp:315
#8  0xb565b640 in JS::MutablePropDescOperations<JS::Rooted<js::PropDesc> >::initialize (checkAccessors=true, v=..., cx=0x280d18, this=0xbec410b8) at ./js/src/vm/PropDesc.h:283
#9  js::ReadPropertyDescriptors (cx=cx@entry=0x280d18, props=..., checkAccessors=checkAccessors@entry=true, ids=ids@entry=0xbec41130, descs=0xbec41170) at ./js/src/jsobj.cpp:941
#10 0xb565b75c in js::DefineProperties (cx=cx@entry=0x280d18, obj=obj@entry=..., props=props@entry=...) at ./js/src/jsobj.cpp:955
#11 0xb53f695e in obj_defineProperties (cx=0x280d18, argc=<optimized out>, vp=<optimized out>) at ./js/src/builtin/Object.cpp:869
#12 0xa8f16594 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)