Hi,

I've run into a known crashing issue in SimpleScriptFunction::call() that's 
been resolved sometime after 5.8.0 :

https://bugs.kde.org/show_bug.cgi?id=384404

* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS 
(code=1, address=0x1909d3508)
  * frame #0: 0x000000010c7ddd77
    frame #1: QtQml`QV4::SimpleScriptFunction::call(that=<unavailable>, 
scope=0x00000001070c8400, callData=<unavailable>) at qv4functionobject.cpp:593 
[opt]
    frame #2: 
QtQml`QV4::Runtime::method_callActivationProperty(QV4::ExecutionEngine*, int, 
QV4::CallData*) [inlined] QV4::Object::call(scope=0x00000001070c8400, 
d=<unavailable>) const at qv4object_p.h:352 [opt]
    frame #3: 
QtQml`QV4::Runtime::method_callActivationProperty(engine=<unavailable>, 
nameIndex=<unavailable>, callData=<unavailable>) at qv4runtime.cpp:982 [opt]
    frame #4: 0x00000001087e6956
    frame #5: QtQml`QV4::SimpleScriptFunction::call(that=<unavailable>, 
scope=0x00000001070c8400, callData=<unavailable>) at qv4functionobject.cpp:593 
[opt]
    frame #6: 
QtQml`QV4::Runtime::method_callActivationProperty(QV4::ExecutionEngine*, int, 
QV4::CallData*) [inlined] QV4::Object::call(scope=0x00000001070c8400, 
d=<unavailable>) const at qv4object_p.h:352 [opt]
    frame #7: 
QtQml`QV4::Runtime::method_callActivationProperty(engine=<unavailable>, 
nameIndex=<unavailable>, callData=<unavailable>) at qv4runtime.cpp:982 [opt]
    frame #8: 0x00000001087e5c03
    frame #9: QtQml`QV4::SimpleScriptFunction::call(that=<unavailable>, 
scope=0x00000001070c8400, callData=<unavailable>) at qv4functionobject.cpp:593 
[opt]
    frame #10: QtQml`QJSValue::call(QList<QJSValue> const&) [inlined] 
QV4::Object::call(scope=0x00000001070c8400, d=<unavailable>) const at 
qv4object_p.h:352 [opt]
    frame #11: QtQml`QJSValue::call(this=<unavailable>, args=<unavailable>) at 
qjsvalue.cpp:669 [opt]

Does this ring a bell for anyone, and above all, is this fixable without 
backporting all the changes from 5.8 to 5.9?

Thanks,
R.
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