Recursion Depth Exceeded Causes Crash #12197
Description
In IDLE:
Python 3.8.2 (tags/v3.8.2:7b3ab59, Feb 25 2020, 23:03:10) [MSC v.1916 64 bit (AMD64)] on win32
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>>> class Vec2:
... def __init__(self, x=0.0, y=0.0):
... self.x = x
... self.y = y
... def __mul__(self, other):
... if type(other) is not Vec2:
... result = Vec2()
... result.x = self.x * other
... result.y = self.y * other
... return result
... else:
... return self.x*other.x + self.y*other.y
... def __rmul__(self, other):
... # introduce bug where self and other should be swapped
... return other * self
...
>>> x = Vec2(1.0, 1.0)
>>> x * 2
<__main__.Vec2 object at 0x0000016278FA7100>
>>> 2 * x
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 15, in __rmul__
File "<stdin>", line 15, in __rmul__
File "<stdin>", line 15, in __rmul__
[Previous line repeated 996 more times]
RecursionError: maximum recursion depth exceededRunning in iPython, instead of a RecursionError, the program directly crashes.
After the crash, the ERRORLEVEL flag is set to -1073741571.
On pip 19.2.3, these are the following dependencies,
Package Version
---------------- -------
backcall 0.1.0
colorama 0.4.3
cycler 0.10.0
decorator 4.4.2
ipython 7.13.0
ipython-genutils 0.2.0
jedi 0.16.0
kiwisolver 1.1.0
matplotlib 3.2.1
numpy 1.18.2
parso 0.6.2
pickleshare 0.7.5
pip 19.2.3
prompt-toolkit 3.0.4
Pygments 2.6.1
pyparsing 2.4.6
python-dateutil 2.8.1
setuptools 41.2.0
six 1.14.0
traitlets 4.3.3
wcwidth 0.1.8