#0  0x00007ffff6cc1475 in *__GI_raise (sig=<optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#1  0x00007ffff6cc46f0 in *__GI_abort () at abort.c:92
#2  0x00007ffff6cba621 in *__GI___assert_fail (assertion=0x7fffd9394b47 "i->opcode == 19 && !src0->mod", file=<optimized out>, line=869, 
    function=0x7fffd93949c2 "emit_flop") at assert.c:81
#3  0x00007fffd8a82367 in emit_flop (i=0x7fffd77925f8, pc=0x7fffd7702000) at nv50_pc_emit.c:869
#4  nv50_emit_instruction (pc=0x7fffd7702000, i=0x7fffd77925f8) at nv50_pc_emit.c:1182
#5  0x00007fffd8a7fe03 in nv50_emit_program (pc=<optimized out>) at nv50_pc.c:456
#6  nv50_generate_code (ti=0x7fffd845b000) at nv50_pc.c:537
#7  0x00007fffd8a7dd0f in nv50_program_translate (p=0x7fffd83f7c00) at nv50_program.c:658
#8  0x00007fffd8a7e1b8 in nv50_program_validate (nv50=0x7fffdbc53000, prog=0x7fffd83f7c00) at nv50_shader_state.c:134
#9  0x00007fffd8a7e673 in nv50_vertprog_validate (nv50=<optimized out>) at nv50_shader_state.c:174
#10 0x00007fffd8a7acf3 in nv50_state_validate (nv50=0x7fffdbc53000, mask=<optimized out>, words=8) at nv50_state_validate.c:393
#11 0x00007fffd8a7bc85 in nv50_draw_vbo (pipe=0x7fffdbc53000, info=<optimized out>) at nv50_vbo.c:660
#12 0x00007fffd8b82573 in st_draw_vbo (ctx=0x7fffd832c000, arrays=<optimized out>, prims=<optimized out>, nr_prims=1, ib=0x7fffffffa5d0, 
    index_bounds_valid=<optimized out>, min_index=4294967295, max_index=4294967295, tfb_vertcount=0x0) at state_tracker/st_draw.c:1112
#13 0x00007fffd8b7b2a7 in vbo_validated_drawrangeelements (ctx=0x7fffd832c000, mode=4, index_bounds_valid=0 '\000', start=4294967295, 
    end=4294967295, count=384, type=5123, indices=0x0, basevertex=0, numInstances=1) at vbo/vbo_exec_array.c:809
#14 0x00007fffd8b7b5dc in vbo_exec_DrawElements (mode=4, count=384, type=5123, indices=0x0) at vbo/vbo_exec_array.c:966
#15 0x00007ffff3901c20 in mozilla::WebGLContext::DrawElements(unsigned int, int, unsigned int, long) () from /home/josi/firefox/libxul.so
#16 0x00007ffff40aeda9 in mozilla::dom::WebGLRenderingContextBinding::drawElements(JSContext*, unsigned int, JS::Value*) ()
   from /home/josi/firefox/libxul.so
#17 0x00007ffff447ac90 in js::InvokeKernel(JSContext*, js::CallArgs, js::MaybeConstruct) () from /home/josi/firefox/libxul.so
#18 0x00007ffff446e489 in js::Interpret(JSContext*, js::StackFrame*, js::InterpMode) () from /home/josi/firefox/libxul.so
#19 0x00007ffff447a77d in js::RunScript(JSContext*, JSScript*, js::StackFrame*) () from /home/josi/firefox/libxul.so
#20 0x00007ffff447a9cb in js::ExecuteKernel(JSContext*, JSScript*, JSObject&, JS::Value const&, js::ExecuteType, js::StackFrame*, JS::Value*)
    () from /home/josi/firefox/libxul.so
#21 0x00007ffff447ca86 in js::Execute(JSContext*, JSScript*, JSObject&, JS::Value*) () from /home/josi/firefox/libxul.so
#22 0x00007ffff441d5d0 in EvaluateUCScriptForPrincipalsCommon(JSContext*, JSObject*, JSPrincipals*, JSPrincipals*, unsigned short const*, unsigned int, char const*, unsigned int, JS::Value*, JSVersion) () from /home/josi/firefox/libxul.so
#23 0x00007ffff441d67b in JS_EvaluateUCScriptForPrincipalsVersionOrigin () from /home/josi/firefox/libxul.so
#24 0x00007ffff3a5bbbc in nsJSContext::EvaluateString(nsAString_internal const&, JSObject*, nsIPrincipal*, nsIPrincipal*, char const*, unsigned int, JSVersion, nsAString_internal*, bool*) () from /home/josi/firefox/libxul.so
#25 0x00007ffff38b8cf5 in nsScriptLoader::EvaluateScript(nsScriptLoadRequest*, nsString const&) () from /home/josi/firefox/libxul.so
#26 0x00007ffff38b8f9d in nsScriptLoader::ProcessRequest(nsScriptLoadRequest*) () from /home/josi/firefox/libxul.so
#27 0x00007ffff38b9ed3 in nsScriptLoader::ProcessScriptElement(nsIScriptElement*) () from /home/josi/firefox/libxul.so
#28 0x00007ffff38b7abf in nsScriptElement::MaybeProcessScript() () from /home/josi/firefox/libxul.so
#29 0x00007ffff39e992d in nsIScriptElement::AttemptToExecute() () from /home/josi/firefox/libxul.so
#30 0x00007ffff3b6e7e1 in nsHtml5TreeOpExecutor::RunScript(nsIContent*) () from /home/josi/firefox/libxul.so
#31 0x00007ffff3b6f7ac in nsHtml5TreeOpExecutor::RunFlushLoop() () from /home/josi/firefox/libxul.so
#32 0x00007ffff3b6f8ed in nsHtml5ExecutorReflusher::Run() () from /home/josi/firefox/libxul.so
#33 0x00007ffff40f4b68 in nsThread::ProcessNextEvent(bool, bool*) () from /home/josi/firefox/libxul.so
#34 0x00007ffff40c2689 in NS_ProcessNextEvent_P(nsIThread*, bool) () from /home/josi/firefox/libxul.so
#35 0x00007ffff4010acb in mozilla::ipc::MessagePump::Run(base::MessagePump::Delegate*) () from /home/josi/firefox/libxul.so
---Type <return> to continue, or q <return> to quit---
#36 0x00007ffff412984e in MessageLoop::Run() () from /home/josi/firefox/libxul.so
#37 0x00007ffff3f647f7 in nsBaseAppShell::Run() () from /home/josi/firefox/libxul.so
#38 0x00007ffff3e24668 in nsAppStartup::Run() () from /home/josi/firefox/libxul.so
#39 0x00007ffff3530cbd in XREMain::XRE_mainRun() () from /home/josi/firefox/libxul.so
#40 0x00007ffff352df76 in XREMain::XRE_main(int, char**, nsXREAppData const*) () from /home/josi/firefox/libxul.so
#41 0x00007ffff352e0d8 in XRE_main () from /home/josi/firefox/libxul.so
#42 0x00000000004026eb in main ()