Infinite recursion causes stack overflow instead of RecursionError

Problem Description

If I run the sample code below, I get a stack overflow error and the kernel restarts. IF I run the same code from the command line, I get a RecursionError as expected.

According to this post by dalthviz, this behavior only happens with the default interpreter.

What steps reproduce the problem?

def callA(a):
    a(a)
c = callA(callA)

Expected output


C:\> python .\testcase.py
Traceback (most recent call last):
  File "C:\testcase.py", line 29, in <module>
    aa.sdsd
  File "C:\testcase.py", line 20, in __getattr__
    if (name in self.members.keys()):
  File "C:\testcase.py", line 20, in __getattr__
    if (name in self.members.keys()):
  File "C:\testcase.py", line 20, in __getattr__
    if (name in self.members.keys()):
  [Previous line repeated 996 more times]
RecursionError: maximum recursion depth exceeded

Actual error (using default interpreter)

Windows fatal exception: stack overflow

Main thread:
Current thread 0x0000e0f8 (most recent call first):
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  File "c:\testcase.py", line 20 in __getattr__
  ...

Restarting kernel...

Versions

Spyder version: 5.1.5
Python version: 3.9.7
Qt version: 5.9.7
PyQt5 version: 5.9.2
Operating System: Windows 10

Dependencies


# Mandatory:
atomicwrites >=1.2.0          :  1.4.0 (OK)
chardet >=2.0.0               :  4.0.0 (OK)
cloudpickle >=0.5.0           :  2.0.0 (OK)
cookiecutter >=1.6.0          :  1.7.2 (OK)
diff_match_patch >=20181111   :  20200713 (OK)
intervaltree >=3.0.2          :  3.1.0 (OK)
IPython >=7.6.0               :  7.32.0 (OK)
jedi >=0.17.2;<0.19.0         :  0.18.1 (OK)
jsonschema >=3.2.0            :  3.2.0 (OK)
keyring >=17.0.0              :  23.1.0 (OK)
nbconvert >=4.0               :  6.1.0 (OK)
numpydoc >=0.6.0              :  1.1.0 (OK)
paramiko >=2.4.0              :  2.7.2 (OK)
parso >=0.7.0;<0.9.0          :  0.8.3 (OK)
pexpect >=4.4.0               :  4.8.0 (OK)
pickleshare >=0.4             :  0.7.5 (OK)
psutil >=5.3                  :  5.8.0 (OK)
pygments >=2.0                :  2.10.0 (OK)
pylint >=2.5.0;<2.10.0        :  2.9.6 (OK)
pyls_spyder >=0.4.0           :  0.4.0 (OK)
pylsp >=1.2.2;<1.3.0          :  1.2.4 (OK)
pylsp_black >=1.0.0           :  None (OK)
qdarkstyle =3.0.2             :  3.0.2 (OK)
qstylizer >=0.1.10            :  0.1.10 (OK)
qtawesome >=1.0.2             :  1.0.2 (OK)
qtconsole >=5.1.0             :  5.1.1 (OK)
qtpy >=1.5.0                  :  1.10.0 (OK)
rtree >=0.9.7                 :  0.9.7 (OK)
setuptools >=49.6.0           :  58.0.4 (OK)
sphinx >=0.6.6                :  4.2.0 (OK)
spyder_kernels >=2.1.1;<2.2.0 :  2.1.3 (OK)
textdistance >=4.2.0          :  4.2.1 (OK)
three_merge >=0.1.1           :  0.1.1 (OK)
watchdog >=0.10.3             :  2.1.3 (OK)
zmq >=17                      :  22.2.1 (OK)

# Optional:
cython >=0.21                 :  0.29.24 (OK)
matplotlib >=2.0.0            :  3.4.1 (OK)
numpy >=1.7                   :  1.21.2 (OK)
pandas >=1.1.1                :  1.3.4 (OK)
scipy >=0.17.0                :  1.6.2 (OK)
sympy >=0.7.3                 :  1.9 (OK)

spyder-ide / spyder

Infinite recursion causes stack overflow instead of RecursionError #18930