Spyder 4.1 quits when closing browser tab from vpython

Description

What steps will reproduce the problem?

When using the python code below, the display is correct, but closing the browser tabe with the vpython display will cause Spyder to crash without error message. This only occurs for Windows 10, not macOS. Only Firefox has been tested as a browser. Versions used: python 3.7.7, Spyder 4.1.2, vpython 7.6.1. This bug does NOT occur with Spyder 4.0.1!

---

from vpython import canvas, color, sphere, vector

def provoke(): scene=canvas(title=“view”,width=800,height=800) scene.background=color.white c = vector(0.8, 0.0, 0.6) p = vector(0,0,0) s = sphere(pos=p, radius=8.0, color=c)

provoke()

Versions

• Spyder version: 4.0.1
• Python version: 3.7.5
• Qt version: 5.9.6
• PyQt5 version: 5.9.2
• Operating System: Windows 10

Dependencies

atomicwrites >=1.2.0         :  1.3.0 (OK)
chardet >=2.0.0              :  3.0.4 (OK)
cloudpickle >=0.5.0          :  1.3.0 (OK)
diff_match_patch >=20181111  :  20181111 (OK)
intervaltree                 :  None (OK)
IPython >=4.0                :  7.13.0 (OK)
jedi =0.14.1                 :  0.14.1 (OK)
nbconvert >=4.0              :  5.6.1 (OK)
numpydoc >=0.6.0             :  0.9.2 (OK)
pexpect >=4.4.0              :  4.8.0 (OK)
pickleshare >=0.4            :  0.7.5 (OK)
psutil >=0.3                 :  5.7.0 (OK)
pygments >=2.0               :  2.6.1 (OK)
pylint >=0.25                :  2.4.4 (OK)
pyls >=0.31.2;<0.32.0        :  0.31.9 (OK)
zmq >=17                     :  18.1.1 (OK)
qdarkstyle >=2.7             :  2.8 (OK)
qtawesome >=0.5.7            :  0.7.0 (OK)
qtconsole >=4.6.0            :  4.7.2 (OK)
qtpy >=1.5.0                 :  1.9.0 (OK)
rtree >=0.8.3                :  0.9.3 (OK)
sphinx >=0.6.6               :  2.4.4 (OK)
spyder_kernels >=1.8.1;<2.0.0:  1.8.1 (OK)
watchdog                     :  None (OK)
cython >=0.21                :  None (NOK)
matplotlib >=2.0.0           :  None (NOK)
numpy >=1.7                  :  1.18.1 (OK)
pandas >=0.13.1              :  None (NOK)
scipy >=0.17.0               :  1.4.1 (OK)
sympy >=0.7.3                :  None (NOK)

[RussAtkinson]

Also, for some reason this happens with Windows 10 but not macOS. That might help focus the search on OS dependent differences.

On Wed, Apr 15, 2020 at 8:36 AM Carlos Cordoba [e-mail] wrote:

Ok, that means this is a problem with our kernel. Therefore, I think you need to check the PRs that were merged between 1.8.1 and 1.9.0 and try to detect what code in them could have introduced this bug (I’m not really sure which one could be the culprit, sorry).

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[ccordoba12]

Ok, that means this is a problem with our kernel. Therefore, I think you need to check the PRs that were merged between 1.8.1 and 1.9.0 and try to detect what code in them could have introduced this bug (I’m not really sure which one could be the culprit, sorry).