https://bugs.kde.org/show_bug.cgi?id=409580
Bug ID: 409580
Summary: Cantor crashes upon python2 backend interruption after
showin the Mayavi demo
Product: cantor
Version: 19.04
Platform: Compiled Sources
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: python2-backend
Assignee: cantor-b...@kde.org
Reporter: d...@bk.ru
Target Milestone: ---
SUMMARY
Cantor crashes upon python2 backend interruption after showin the Mayavi demo
PREVIOUS BUGS:
Bug 409288, Bug 409523, Bug 409520 _(at the moment me is undecided about the
cause)_
STEPS TO REPRODUCE
1. Compile the latest Cantor sources
2. Disable image integration for the python backend, as suggested in Bug 409523
3. Try Mayavi2's demo:
``` python
# Create the data.
from numpy import pi, sin, cos, mgrid
dphi, dtheta = pi/250.0, pi/250.0
[phi,theta] = mgrid[0:pi+dphi*1.5:dphi,0:2*pi+dtheta*1.5:dtheta]
m0 = 4; m1 = 3; m2 = 2; m3 = 3; m4 = 6; m5 = 2; m6 = 6; m7 = 4;
r = sin(m0*phi)**m1 + cos(m2*phi)**m3 + sin(m4*theta)**m5 + cos(m6*theta)**m7
x = r*sin(phi)*cos(theta)
y = r*cos(phi)
z = r*sin(phi)*sin(theta)
# View it.
from mayavi import mlab
s = mlab.mesh(x, y, z)
mlab.show()
```
_(equivalent to running `env QT_ALL=pyside2 ETS_BACKEND=qt4 gdb cantor` under
the debugger; yes `qt4` is confusing as it means in the ETS language either of
both Qt4 or Qt5, so don't change it)_
Everything works so far. Then close the VTK/Mayavi window, Cantor is still
"Running…". Now interrupt the [python2] backend.
OBSERVED RESULT
Cantor crashed with the following gdb-backtrace:
EXPECTED RESULT
The backend interruption.
SOFTWARE/OS VERSIONS
as reported earlier
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