qmlcachegen reaches Q_UNREACHABLE

#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44

#1  0x00007ffff389b453 in __pthread_kill_internal (threadid=<optimized out>, signo=6) at pthread_kill.c:89

#2  0x00007ffff3841cb6 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26

#3  0x00007ffff382938b in __GI_abort () at abort.c:73

#4  0x00007ffff41b0024 in qAbort () at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qassert.cpp:46

#5  0x00007ffff420c1ae in qt_maybe_message_fatal<QString&> (msgType=msgType@entry=QtFatalMsg, context=..., message=...)

    at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlogging.cpp:2140

#6  0x00007ffff420c31f in qt_message(QtMsgType, const QMessageLogContext &, const char *, typedef __va_list_tag __va_list_tag *)

    (msgType=msgType@entry=QtFatalMsg, context=..., msg=msg@entry=0x7ffff4d2fcc0 "ASSERT failure in %s: \"%s\", file %s, line %d", a
p=ap@entry=0x7bfff0470620) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlogging.cpp:412

#7  0x00007ffff421abbd in QMessageLogger::fatal

    (this=this@entry=0x7bfff02ae3a0, msg=msg@entry=0x7ffff4d2fcc0 "ASSERT failure in %s: \"%s\", file %s, line %d")

    at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlogging.cpp:901

#8  0x00007ffff41b0303 in qt_assert_x

    (where=where@entry=0x7ffff75c5ac0 "Q_UNREACHABLE()", what=what@entry=0x7ffff75c5a80 "Q_UNREACHABLE was reached", file=file@entry
=0x7ffff75c13a0 "/home/nico/workspace/qt6-dev/qtdeclarative/src/qmlcompiler/qqmljscodegenerator.cpp", line=line@entry=1551)

    at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qassert.cpp:115

#9  0x00007ffff7148651 in QQmlJSCodeGenerator::generate_GetOptionalLookup

    (this=0x7bfff07d5950, index=<optimized out>, offset=<optimized out>)

    at /home/nico/workspace/qt6-dev/qtdeclarative/src/qmlcompiler/qqmljscodegenerator.cpp:1551

#10 0x00007ffff5d80da7 in QV4::Moth::ByteCodeHandler::decode

    (this=this@entry=0x7bfff07d5950, code=0x7c5ff17467d7 "XN\a\254\002\a", len=<optimized out>)

    at /home/nico/workspace/qt6-dev/qtdeclarative/src/qml/compiler/qv4bytecodehandler.cpp:41

#11 0x00007ffff710c71e in QQmlJSCodeGenerator::run

    (this=this@entry=0x7bfff07d5950, function=function@entry=0x7bfff05c26c0, basicBlocksValidationFailed=false)

    at /home/nico/workspace/qt6-dev/qtdeclarative/src/qmlcompiler/qqmljscodegenerator.cpp:185

#12 0x00007ffff71c9ba2 in QQmlJSAotCompiler::doCompile

    (this=this@entry=0x7bfff0902860, context=<optimized out>, function=function@entry=0x7bfff05c26c0)

    at /home/nico/workspace/qt6-dev/qtdeclarative/src/qmlcompiler/qqmljscompiler.cpp:790

#13 0x00007ffff71ca4d9 in QQmlJSAotCompiler::doCompileAndRecordAotStats

    (this=this@entry=0x7bfff0902860, context=context@entry=0x7d3ff15e7440, function=function@entry=0x7bfff05c26c0, name=..., locatio
n=...) at /home/nico/workspace/qt6-dev/qtdeclarative/src/qmlcompiler/qqmljscompiler.cpp:804

#14 0x00007ffff71cb42f in QQmlJSAotCompiler::compileBinding

    (this=0x7bfff0902860, context=<optimized out>, irBinding=<optimized out>, astNode=<optimized out>)

    at /home/nico/workspace/qt6-dev/qtdeclarative/src/qmlcompiler/qqmljscompiler.cpp:679

#15 0x00007ffff71ce507 in operator() (__closure=__closure@entry=0x7bfff03a7370, bindingOrFunction=...)

    at /home/nico/workspace/qt6-dev/qtdeclarative/src/qmlcompiler/qqmljscompiler.cpp:320

#16 0x00007ffff71cfe73 in std::for_each<__gnu_cxx::__normal_iterator<BindingOrFunction*, std::vector<BindingOrFunction> >, qCompileQ
mlFile(QmlIR::Document&, const QString&, QQmlJSSaveFunction, QQmlJSAotCompiler*, QQmlJSCompileError*, bool, QV4::Compiler::CodegenWa
rningInterface*, const QString*)::<lambda(const BindingOrFunction&)> >(__gnu_cxx::__normal_iterator<BindingOrFunction*, std::vector<
BindingOrFunction, std::allocator<BindingOrFunction> > >, __gnu_cxx::__normal_iterator<BindingOrFunction*, std::vector<BindingOrFunc
tion, std::allocator<BindingOrFunction> > >, struct {...}) (__first=Python Exception <class 'gdb.error'>: value has been optimized o
ut

, __last=Python Exception <class 'gdb.error'>: value has been optimized out

, __f=...) at /usr/include/c++/14/bits/stl_algo.h:3786

#17 0x00007ffff71d27f3 in qCompileQmlFile

    (irDocument=..., inputFileName=..., saveFunction=..., aotCompiler=aotCompiler@entry=0x7bfff0902860, error=error@entry=0x7bfff090
1e30, storeSourceLocation=storeSourceLocation@entry=true, interface=<optimized out>, fileContents=<optimized out>)

    at /home/nico/workspace/qt6-dev/qtdeclarative/src/qmlcompiler/qqmljscompiler.cpp:262

#18 0x00007ffff71d3248 in qCompileQmlFile

    (inputFileName=..., saveFunction=..., aotCompiler=aotCompiler@entry=0x7bfff0902860, error=error@entry=0x7bfff0901e30, storeSourc
eLocation=storeSourceLocation@entry=true, interface=interface@entry=0x555555582010 <QV4::Compiler::defaultCodegenWarningInterface():
:iface>, fileContents=<optimized out>) at /home/nico/workspace/qt6-dev/qtdeclarative/src/qmlcompiler/qqmljscompiler.cpp:178

#19 0x0000555555563989 in main (argc=<optimized out>, argv=<optimized out>)

    at /home/nico/workspace/qt6-dev/qtdeclarative/tools/qmlcachegen/qmlcachegen.cpp:305