Bug 159627 – New stress/arity-check-ftl-throw.js crashes on Linux bots

• Status: NEW
• Component: JavaScriptCore

[Csaba Osztrogonác]

It is introduced in https://trac.webkit.org/changeset/202838 and crashes on Linux bots:
- GTK: https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Release%20%28Tests%29/builds/16835
- EFL: https://build.webkit.org/builders/EFL%20Linux%2064-bit%20Release%20WK2/builds/28753

(note: I just reported this bug, I'm not interested in fixing this bug at all.
I don't have any time to generate backtraces or help anybody fixing it.)

[Csaba Osztrogonác]

This bug is still valid, stress/arity-check-ftl-throw.js.ftl-no-cjit-validate-sampling-profiler still crashes on the EFL and GTK bots and it crashes for me on JSCOnly port too.

[Csaba Osztrogonác]

$ ./jsc --useFunctionDotArguments=true --maxPerThreadStackUsage=1572864 --validateGraph=true --useSamplingProfiler=true --useConcurrentJIT=false --thresholdForJITAfterWarmUp=100 --scribbleFreeCells=true arity-check-ftl-throw.js

ASSERTION FAILED: isCell()
../../Source/JavaScriptCore/runtime/JSCJSValueInlines.h(500) : JSC::JSCell* JSC::JSValue::asCell() const


(gdb) bt
#0  0x00007f0d6258b1bf in WTFCrash () at ../../Source/WTF/wtf/Assertions.cpp:323
#1  0x000000000045030d in JSC::JSValue::asCell (this=0x7ffd07651fc0) at ../../Source/JavaScriptCore/runtime/JSCJSValueInlines.h:500
#2  0x000000000044c827 in JSC::asObject (value=...) at ../../Source/JavaScriptCore/runtime/JSObject.h:1175
#3  0x000000000044d124 in JSC::Register::object (this=0x7ffd07652148) at ../../Source/JavaScriptCore/runtime/JSObject.h:1497
#4  0x0000000000448fc4 in JSC::ExecState::callee (this=0x7ffd07652130) at ../../Source/JavaScriptCore/interpreter/CallFrame.h:90
#5  0x000000000044d469 in JSC::ExecState::vm (this=0x7ffd07652130) at ../../Source/JavaScriptCore/runtime/JSCellInlines.h:118
#6  0x00007f0d61fe4d34 in JSC::FTL::compileFTLLazySlowPath (exec=0x7ffd07652130, index=2)
    at ../../Source/JavaScriptCore/ftl/FTLOperations.cpp:347
#7  0x00007f0d1c40397e in ?? ()
#8  0x0000000003b29bea in ?? ()
#9  0x0000000003b29bea in ?? ()
#10 0x00007ffd07652130 in ?? ()
#11 0x0000000000000002 in ?? ()
#12 0x0000000000000000 in ?? ()

[Csaba Osztrogonác]

Created attachment 288798 [details]
log with --showDisassembly=true command line option