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realXtend / tundra

realXtend Tundra SDK, a 3D virtual world application platform.
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sightings of crash in createPythonQtClassWrapper #611

Closed erno closed 11 years ago

erno commented 11 years ago

Matti at Chiru ran into this after setting up a new 12.10 machine and there was earlier a mention on #realxtend-dev about it with 2 sightings reported.

Loading plugin 'PythonScriptModule'.

Program received signal SIGSEGV, Segmentation fault. 0xa7bab569 in PythonQtPrivate::createPythonQtClassWrapper(PythonQtClassInfo, char const, object) () from /rex/naali-deps/install/lib/libPythonQt.so.1 (gdb) backtrace 0 0xa7bab569 in PythonQtPrivate::createPythonQtClassWrapper(PythonQtClassInfo, char const, object) () from /rex/naali-deps/install/lib/libPythonQt.so.1 1 0xa7bace81 in PythonQtPrivate::registerCPPClass(char const, char const, char const, QObject ()(), void ()(void, PythonQtInstanceWrapperStruct), object, int) () from

/rex/naali-deps/install/lib/libPythonQt.so.1 2 0xa7c30886 in PythonQt_init_QtCoreBuiltin(_object_) () from /rex/naali-deps/install/lib/libPythonQt.so.1 3 0xa7baef67 in PythonQt::init(int, QByteArray const&) () from /rex/naali-deps/install/lib/libPythonQt.so.1 4 0xa80152ea in PythonScript::PythonScriptModule::StartPythonQt ( this=this@entry=0x8396dd8) at /rex/naali/src/Application/PythonScriptModule/PythonScriptModule 5 0xa80163a2 in PythonScript::PythonScriptModule::PythonScriptModule ( this=0x8396dd8) at /rex/naali/src/Application/PythonScriptModule/PythonScriptModule 6 0xa8016423 in TundraPluginMain (fw=0x8050278) at /rex/naali/src/Application/PythonScriptModule/PythonScriptModule 7 0xb7df01fe in PluginAPI::LoadPlugin (this=0x81a4cf0, filename=...) at /rex/naali/src/Core/TundraCore/Framework/PluginAPI.cpp:119
erno commented 11 years ago

I'm seeing this now after updating a laptop to 12.10 (64-bit).

erno commented 11 years ago

I tried git bisect on this but the build was broken in most places in recent history.

antont commented 11 years ago

due to deps changing or? mostly it has been working in history otherwise IIRC, at least we've been many using it all the time?

when i tried to bisect the recent particle system loading bug, noticed that wasn't easy as builds from different points in history didn't just work, i was thinking it was due to deps changes.

erno commented 11 years ago

a couple of bisect points had compile errors in PythonScriptingModule and one failed in a bullet-related compile error that sounded like a deps mismatch.

antont commented 11 years ago

I made these minimal disables to track the crash a bit, this way the module seems to run on 12.10 - didn't verify yet how much it actually works, possibly not much at all for the qt accessing, but at least doesn't crash.

https://github.com/antont/tundra/commit/a4ca32f62bf2637f405ec11e4ec3fa6a2906e400

the disabling is not minimal, possibly calling the py c api init would not make it crash.

I wonder if this has to do with how we've been using both the py c api init call and the pythonqt init mechanism.

Stinkfist0 commented 11 years ago

Closing and migrating this issue to https://github.com/realXtend/TundraAddons/issues/4