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subclassing the math.Vector2 class results in Fatal Error #552

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MattR0se opened this issue Oct 9, 2018 · 2 comments

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@MattR0se
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commented Oct 9, 2018

When I make a subclass of pygame.math.Vector2 and do a scalar multiplication, it results in a crash and a Fatal Error

import pygame

class Vector(pygame.math.Vector2):
    pass

# this stuff works fine
vec_a = Vector(2, 0)
vec_b = Vector(0, 1)

print(vec_a + vec_b)
print(vec_a.length())
print(vec_a.normalize())

vec_c = vec_a.rotate(90)
print(vec_c)

# but this raises the Error
vec_a *= 2

The Error message I get is

Fatal Python error: (pygame parachute) Segmentation Fault

Reproducability: I only tried this on two Windows 7 PCs with python 3.6 and in Spyder. Pygame Version is 1.9.3

Also someone on reddit said they got the same error
https://www.reddit.com/r/learnpython/comments/9mnu4b/making_an_existing_class_hashable_pygame_vector/

@illume

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commented Oct 9, 2018

Thanks :) I guess the *= part is just using a hardcoded self, when it probably has to do a more complicated lookup because of the inheritance.

Would it be possible to submit a pull request with this as a unit test? https://www.pygame.org/contribute.html

@illume illume added this to the 1.9.5 milestone Oct 9, 2018

sw00 added a commit to sw00/pygame that referenced this issue Oct 14, 2018

cmtrapp02 added a commit to cmtrapp02/pygame that referenced this issue Oct 15, 2018

Added math.Vector2 subclass test for issue pygame#552
Added new function that tests a subclassed math.Vector2 for issue pygame#552.
This is my first contribution on Github, so any feedback if necessary would be greatly appreciated!

illume added a commit that referenced this issue Oct 16, 2018

Merge pull request #560 from cmtrapp02/cmtrapp02-patch-1
Added math.Vector2 subclass test for issue #552

@illume illume closed this in c39ddee Oct 16, 2018

@PietroPasotti

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commented Mar 18, 2019

When is this going to be fixed? I am having some related issues

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