Fix buffer size plus #9
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pcanal
reviewed
Nov 4, 2021
pcanal
reviewed
Nov 4, 2021
pcanal
reviewed
Nov 4, 2021
pcanal
reviewed
Nov 4, 2021
pcanal
reviewed
Nov 4, 2021
pcanal
reviewed
Nov 4, 2021
pcanal
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Nov 4, 2021
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Nov 9, 2021
This tutorial crashed with the following stacktrace when run
interactively. Avoiding to register a canvas with the same name
multiple times fixes the crash:
```
#8 0x00007f5b7876967d in TCanvas::Resize(char const*) (this=0x55e768e126c0) at ../graf2d/gpad/src/TCanvas.cxx:1740
#9 0x00007f5b3e90d668 in TRootCanvas::HandleContainerConfigure(Event_t*) (this=0x55e76852b460) at ../gui/gui/src/TRootCanvas.cxx:1789
#10 0x00007f5b3e8464fd in TGFrame::HandleEvent(Event_t*) (this=0x55e767938e70, event=0x7f5b79adff40) at ../gui/gui/src/TGFrame.cxx:476
#11 0x00007f5b3e7f4c9a in TGClient::HandleEvent(Event_t*) (this=0x55e768de2290, event=0x7f5b79adff40) at ../gui/gui/src/TGClient.cxx:846
#12 0x00007f5b3e7f531d in TGClient::ProcessOneEvent() (this=0x55e768de2290) at ../gui/gui/src/TGClient.cxx:656
#13 TGClient::ProcessOneEvent() (this=0x55e768de2290) at ../gui/gui/src/TGClient.cxx:648
#14 0x00007f5b3e7f536b in TGClient::HandleInput() (this=0x55e768de2290) at ../gui/gui/src/TGClient.cxx:703
#15 0x00007f5b8dcb0ff8 in TUnixSystem::DispatchOneEvent(bool) (this=0x55e75ccfd080, pendingOnly=<optimized out>) at ../core/unix/src/TUnixSystem.cxx:1067
#16 0x00007f5b8dbd0dca in TSystem::ProcessEvents() (this=0x55e75ccfd080) at ../core/base/src/TSystem.cxx:424
#17 0x00007f5b8130600d in ()
#18 0x00007f5b79ae0450 in ()
#19 0x00007f5b8de5215f in WrapperCall(Cppyy::TCppMethod_t, size_t, void*, void*, void*) (method=94452242807424, nargs=0, args_=0x7f5b79ae01d7, self=0x55e75ccfd080, result=0x7f5b79ae01d7) at ../bindings/pyroot/cppyy/cppyy-backend/clingwrapper/src/clingwrapper.cxx:778
#20 0x00007f5b8de527cf in CallT<unsigned char> (args=<optimized out>, nargs=<optimized out>, self=<optimized out>, method=<optimized out>) at ../bindings/pyroot/cppyy/cppyy-backend/clingwrapper/src/clingwrapper.cxx:816
#21 Cppyy::CallB(long, void*, unsigned long, void*) (method=<optimized out>, self=<optimized out>, nargs=<optimized out>, args=<optimized out>) at ../bindings/pyroot/cppyy/cppyy-backend/clingwrapper/src/clingwrapper.cxx:833
#22 0x00007f5b8decdc0f in GILCallB (ctxt=0x7f5b79ae0430, self=<optimized out>, method=<optimized out>) at ../bindings/pyroot/cppyy/CPyCppyy/src/Executors.cxx:69
root-project#23 CPyCppyy::(anonymous namespace)::BoolExecutor::Execute(Cppyy::TCppMethod_t, Cppyy::TCppObject_t, CPyCppyy::CallContext*) (this=<optimized out>, method=<optimized out>, self=<optimized out>, ctxt=0x7f5b79ae0430) at ../bindings/pyroot/cppyy/CPyCppyy/src/Executors.cxx:148
root-project#24 0x00007f5b8deba4c9 in CPyCppyy::CPPMethod::ExecuteFast(void*, long, CPyCppyy::CallContext*) (self=<optimized out>, offset=<optimized out>, ctxt=<optimized out>, this=<optimized out>, this=<optimized out>) at ../bindings/pyroot/cppyy/CPyCppyy/src/CPPMethod.cxx:74
root-project#25 0x00007f5b8debd3a8 in CPyCppyy::CPPMethod::ExecuteProtected(void*, long, CPyCppyy::CallContext*) (this=this entry=0x55e760617f50, self=0x55e75ccfd080, offset=0, ctxt=0x7f5b79ae0430) at ../bindings/pyroot/cppyy/CPyCppyy/src/CPPMethod.cxx:149
root-project#26 0x00007f5b8debb6fa in CPyCppyy::CPPMethod::Execute(void*, long, CPyCppyy::CallContext*) (this=this entry=0x55e760617f50, self=self entry=0x55e75ccfd080, offset=<optimized out>, ctxt=ctxt entry=0x7f5b79ae0430) at ../bindings/pyroot/cppyy/CPyCppyy/src/CPPMethod.cxx:728
root-project#27 0x00007f5b8debc46c in CPyCppyy::CPPMethod::Call(CPyCppyy::CPPInstance*&, _object*, _object*, CPyCppyy::CallContext*) (this=0x55e760617f50, self= 0x7f5b8080ef50: 0x7f5b808043c0, args=0x7f5b8e1ab040, kwds=<optimized out>, ctxt=0x7f5b79ae0430) at ../bindings/pyroot/cppyy/CPyCppyy/src/CPPMethod.cxx:783
root-project#28 0x00007f5b8dec09fe in CPyCppyy::(anonymous namespace)::mp_call(CPyCppyy::CPPOverload*, PyObject*, PyObject*) (pymeth=0x7f5b8080ef40, args=0x7f5b8e1ab040, kwds=0x0) at ../bindings/pyroot/cppyy/CPyCppyy/src/CPPOverload.cxx:566
root-project#29 0x00007f5b8e941333 in _PyObject_MakeTpCall () at /usr/lib/libpython3.9.so.1.0
root-project#30 0x00007f5b8e93d218 in _PyEval_EvalFrameDefault () at /usr/lib/libpython3.9.so.1.0
root-project#31 0x00007f5b8e936fd9 in () at /usr/lib/libpython3.9.so.1.0
root-project#32 0x00007f5b8e948b8e in _PyFunction_Vectorcall () at /usr/lib/libpython3.9.so.1.0
root-project#33 0x00007f5b8e93aec9 in _PyEval_EvalFrameDefault () at /usr/lib/libpython3.9.so.1.0
root-project#34 0x00007f5b8e94896b in _PyFunction_Vectorcall () at /usr/lib/libpython3.9.so.1.0
root-project#35 0x00007f5b8e93858e in _PyEval_EvalFrameDefault () at /usr/lib/libpython3.9.so.1.0
root-project#36 0x00007f5b8e94896b in _PyFunction_Vectorcall () at /usr/lib/libpython3.9.so.1.0
root-project#37 0x00007f5b8e93858e in _PyEval_EvalFrameDefault () at /usr/lib/libpython3.9.so.1.0
root-project#38 0x00007f5b8e94896b in _PyFunction_Vectorcall () at /usr/lib/libpython3.9.so.1.0
root-project#39 0x00007f5b8e95795b in () at /usr/lib/libpython3.9.so.1.0
root-project#40 0x00007f5b8ea3cac6 in () at /usr/lib/libpython3.9.so.1.0
root-project#41 0x00007f5b8ea17554 in () at /usr/lib/libpython3.9.so.1.0
root-project#42 0x00007f5b8e62c259 in start_thread () at /usr/lib/libpthread.so.0
root-project#43 0x00007f5b8e7425e3 in clone () at /usr/lib/libc.so.6
```
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One bug fix, plus some clean-up.