https://bugs.kde.org/show_bug.cgi?id=408179

--- Comment #40 from vialav <d...@bk.ru> ---
I can swiftly report that the buttons still don't work with the latest code
(the same symptoms). About Python refactoring I may open a new ticket, if
needed, but both the python(s) backend(s) stopped working, seemingly unable to
`import numpy`, which is present and importable. In addition Shift+Enter
doesn't crash Cantor, but clicking on the "triangle" to execute a cell (not
touching a keyboard) leads to a segfault.

QObject::connect: signal not found in KSelectAction
QObject::connect: signal not found in KToggleAction
QObject::connect: signal not found in QAction
QObject::connect: signal not found in QAction
QObject::connect: signal not found in QAction
Invalid Context= "stock" line for icon theme: 
"/usr/share/icons/ubuntu-mono-dark/stock/16/"
Invalid Context= "stock" line for icon theme: 
"/usr/share/icons/ubuntu-mono-dark/stock/22/"
Invalid Context= "stock" line for icon theme: 
"/usr/share/icons/ubuntu-mono-dark/stock/24/"
Invalid Context= "stock" line for icon theme: 
"/usr/share/icons/ubuntu-mono-dark/stock/32/"
Invalid Context= "stock" line for icon theme: 
"/usr/share/icons/ubuntu-mono-dark/stock/48/"
Invalid Context= "stock" line for icon theme: 
"/usr/share/icons/ubuntu-mono-dark/stock/64/"
Invalid Context= "stock" line for icon theme: 
"/usr/share/icons/ubuntu-mono-dark/stock/128/"
dir:  "/usr/lib/x86_64-linux-gnu/qt5/plugins/cantor/backends"
Creating MaximaBackend
Creating NullBackend
Creating PythonBackend
Creating PythonBackend
Creating RBackend
Creating SageBackend
Creating ScilabBackend
dir:  "/usr/bin/cantor/backends"
Backend  "Python 2"  offers extensions:  ("LinearAlgebraExtension",
"PackagingExtension", "PlotExtension", "ScriptExtension",
"VariableManagementExtension")
PythonSession(0x1b61840) Cantor::VariableManagementExtension(0x18ee380, name =
"VariableManagementExtension")
PythonHighlighter constructor
PythonKeywords constructor
new worksheetaccess interface
loading assistants...
dir:  "/usr/lib/x86_64-linux-gnu/qt5/plugins/cantor/assistants"
plugin  "AdvancedPlot"  is not supported by  "Python 2"
plugin  "Create Matrix"  is supported by  "Python 2" , requires extensions 
("LinearAlgebraExtension")
QObject::connect: signal not found in QAction
plugin  "Differentiate"  is not supported by  "Python 2"
plugin  "Eigenvalues"  is not supported by  "Python 2"
plugin  "Eigenvectors"  is not supported by  "Python 2"
plugin  "Import Package"  is supported by  "Python 2" , requires extensions 
("PackagingExtension")
QObject::connect: signal not found in QAction
plugin  "Integrate"  is not supported by  "Python 2"
plugin  "Invert Matrix"  is not supported by  "Python 2"
plugin  "Plot2d"  is supported by  "Python 2" , requires extensions 
("PlotExtension")
QObject::connect: signal not found in QAction
plugin  "Plot3d"  is supported by  "Python 2" , requires extensions 
("PlotExtension")
QObject::connect: signal not found in QAction
plugin  "QalculatePlot"  is not supported by  "Python 2"
plugin  "RunScript"  is supported by  "Python 2" , requires extensions 
("ScriptExtension")
QObject::connect: signal not found in QAction
plugin  "Solve"  is not supported by  "Python 2"
dir:  "/usr/bin/cantor/assistants"
loading panel plugins for session of type  "Python 2"
Requesting capabilities of Python3Session
dir:  "/usr/lib/x86_64-linux-gnu/qt5/plugins/cantor/panels"
plugin  "Help"  is supported, requires extensions  ("")
plugin  "Variable Manager"  is not supported
dir:  "/usr/bin/cantor/panels"
Requesting capabilities of Python3Session
Entry Appended
adding panel for  "Help"
ShortcutOverride 16777220 QFlags<Qt::KeyboardModifiers>(ShiftModifier)
login
QObject::connect: signal not found in QTimer
send command:  "login" ()
send command:  "setFilePath" ("")
evaluating:  "try:\n    import numpy\nexcept ModuleNotFoundError:\n    pass\n"
wsStatusChange 0
wsStatusChange 0
run first expression "try:\n    import numpy\nexcept ModuleNotFoundError:\n   
pass\n\n"
send command:  "code" ("try:\n    import numpy\nexcept ModuleNotFoundError:\n  
 pass\n\n")
wsStatusChange 1
evaluating:  "1+1"
wsStatusChange 0

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