Spyder window becomes unresponsive after about 50 seconds

[b-a0]

Issue Report Checklist

• Searched the issues page for similar reports
  • Spyder crashes on startup. Segmentation fault: fromIccProfile: failed minimal tag size sanity  #22239 might be related.
• Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
• Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
• Could not reproduce inside jupyter qtconsole (if console-related)
• Tried basic troubleshooting (if a bug/error)
  • Restarted Spyder
  • Reset preferences with spyder --reset
  • Reinstalled the latest version of Anaconda
  • Tried the other applicable steps from the Troubleshooting Guide
• Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

Whenever I start Spyder 5.5.5 on Windows Server 2022 I get it running for about 50 seconds before the window freezes and it's marked as "Not responding".

This happens regardless of:

• Install method: it occurs with standalone as well as conda installs
• Settings: this happens after spyder --reset as well
• Start method: this happens both for a commandline start (with/without debug options), a conda environment start, as well as from the Start Menu.
• Interpreter: this happens both for the built-in interpreter as well as an external interpreter

What steps reproduce the problem?

1. Open Spyder, using either:
   • The start menu shortcut
   • Commandline from a conda environment: conda activate my-env; spyder
   • Commandline from standalone install: C:\Program Files\Spyder > Python\python.exe Spyder.launch.pyw --debug-info verbose
2. In the ipython console write:

   import time
   for i in range(0, 600):
       print(i)
       time.sleep(1)

3. Run the code

What is the expected output? What do you see instead?

Expected: the loop finishes in 600 seconds and writes the index each second.
Actual: the Spyder window hangs when the loop is around index 50, i.e. after 50 seconds.

Paste Traceback/Error Below (if applicable)

PASTE TRACEBACK HERE: N/A

Versions

This is for the standalone install

• Spyder version: 5.5.5 (standalone)
• Python version: 3.8.10 64-bit
• Qt version: 5.15.2
• PyQt5 version: 5.15.10
• Operating System: Windows-10-10.0.20348-SP0

Dependencies

Click to fold out the dependencies of the standalone install

# Mandatory:
atomicwrites >=1.2.0          :  1.4.1 (OK)
chardet >=2.0.0               :  5.2.0 (OK)
cloudpickle >=0.5.0           :  3.0.0 (OK)
cookiecutter >=1.6.0          :  2.6.0 (OK)
diff_match_patch >=20181111   :  20230430 (OK)
intervaltree                  :  None (OK)
IPython >=8.12.2,<8.13.0      :  8.12.3 (OK)
jedi >=0.17.2,<0.20.0         :  0.19.1 (OK)
jellyfish >=0.7               :  1.0.4 (OK)
jsonschema >=3.2.0            :  4.22.0 (OK)
keyring >=17.0.0              :  25.2.1 (OK)
nbconvert >=4.0               :  7.16.4 (OK)
numpydoc >=0.6.0              :  1.7.0 (OK)
paramiko >=2.4.0              :  3.4.0 (OK)
parso >=0.7.0,<0.9.0          :  0.8.4 (OK)
pexpect >=4.4.0               :  4.9.0 (OK)
pickleshare >=0.4             :  0.7.5 (OK)
psutil >=5.3                  :  5.9.8 (OK)
pygments >=2.0                :  2.18.0 (OK)
pylint >=3.1,<4               :  3.2.3 (OK)
pylint_venv >=3.0.2           :  3.0.3 (OK)
pyls_spyder >=0.4.0           :  0.4.0 (OK)
pylsp >=1.11.0,<1.12.0        :  1.11.0 (OK)
pylsp_black >=2.0.0,<3.0.0    :  2.0.0 (OK)
qdarkstyle >=3.2.0,<3.3.0     :  3.2.3 (OK)
qstylizer >=0.2.2             :  0.2.3 (OK)
qtawesome >=1.3.1,<1.4.0      :  1.3.1 (OK)
qtconsole >=5.5.1,<5.6.0      :  5.5.2 (OK)
qtpy >=2.1.0                  :  2.4.1 (OK)
rtree >=0.9.7                 :  1.2.0 (OK)
setuptools >=49.6.0           :  70.0.0 (OK)
sphinx >=0.6.6                :  7.1.2 (OK)
spyder_kernels >=2.5.2,<2.6.0 :  2.5.2 (OK)
textdistance >=4.2.0          :  4.6.2 (OK)
three_merge >=0.1.1           :  0.1.1 (OK)
watchdog                      :  4.0.1 (OK)
zmq >=24.0.0                  :  26.0.3 (OK)

# Optional:
cython >=0.21                 :  3.0.10 (OK)
matplotlib >=3.0.0            :  3.7.5 (OK)
numpy >=1.7                   :  1.24.4 (OK)
pandas >=1.1.1                :  2.0.3 (OK)
scipy >=0.17.0                :  1.10.1 (OK)
sympy >=0.7.3                 :  1.12.1 (OK)

Additional logs

This is the full debug log after I start standalone Spyder with the --debug-output verbose flag (large log, 1500+ lines): https://pastebin.com/nnwuSrpA

[b-a0]

After opening this issue I installed Spyder 5.4.5, that worked without a problem, so that's a viable workaround. However, would like to keep this issue open such that a long term solution can be found.

[ccordoba12]

Hey @b-a0, thanks for reporting. Our new installers for Spyder 6 will come with a more recent Python version and are built with a more modern stack too.

That could help to solve this problem, but let us know if that's case after that version is released in a few weeks.