Segmentation fault when using solid_overlay on empty rendered text

[OwenCMYK]

Environment:

pygame-ce 2.5.7 (SDL 2.32.10, Python 3.13.7)
Platform:		Windows-10-10.0.19045-SP0
System:			Windows
System Version:		10.0.19045
Processor:		AMD64 Family 23 Model 24 Stepping 1, AuthenticAMD	SSE2: Yes	AVX2: Yes	NEON: No
Architecture:		Bits: 64bit	Linkage: WindowsPE

Python:			CPython 3.13.7 (tags/v3.13.7:bcee1c3, Aug 14 2025, 14:15:11) [MSC v.1944 64 bit (AMD64)]
GIL Enabled:		True
pygame version:		2.5.7
SDL versions:		Linked: 2.32.10	Compiled: 2.32.10
SDL Mixer versions:	Linked: 2.8.1	Compiled: 2.8.1
SDL Font versions:	Linked: 2.24.0	Compiled: 2.24.0
SDL Image versions:	Linked: 2.8.8	Compiled: 2.8.8
Freetype versions:	Linked: 2.11.1	Compiled: 2.11.1

Display Driver:		windows
Mixer Driver:		wasapi

Current behavior:

Python crashes with a segmentation fault.

Expected behavior:

The code should make a small window, and then close.

Test code

import pygame
pygame.init()
win = pygame.display.set_mode((1,1)) # Resolution doesn't seem to matter
Font = pygame.font.Font("Fonts/CloisterBlack.ttf", 1) # Font and size doesn't seem to matter
RenderedText = Font.render("", 0, (0, 0, 0)).convert_alpha() # Text has to be empty
pygame.transform.solid_overlay(RenderedText,(255,255,255))

Stack trace/error output/other error logs

pygame-ce 2.5.7 (SDL 2.32.10, Python 3.13.7)
Platform:		Windows-10-10.0.19045-SP0
System:			Windows
System Version:		10.0.19045
Processor:		AMD64 Family 23 Model 24 Stepping 1, AuthenticAMD	SSE2: Yes	AVX2: Yes	NEON: No
Architecture:		Bits: 64bit	Linkage: WindowsPE

Python:			CPython 3.13.7 (tags/v3.13.7:bcee1c3, Aug 14 2025, 14:15:11) [MSC v.1944 64 bit (AMD64)]
GIL Enabled:		True
pygame version:		2.5.7
SDL versions:		Linked: 2.32.10	Compiled: 2.32.10
SDL Mixer versions:	Linked: 2.8.1	Compiled: 2.8.1
SDL Font versions:	Linked: 2.24.0	Compiled: 2.24.0
SDL Image versions:	Linked: 2.8.8	Compiled: 2.8.8
Freetype versions:	Linked: 2.11.1	Compiled: 2.11.1

Display Driver:		windows
Mixer Driver:		wasapi
Fatal Python error: pygame_parachute: (pygame parachute) Segmentation Fault
Python runtime state: initialized

Current thread 0x000006ec (most recent call first):
  File "[filepath removed for privacy]/Pygame Smoothscale Reproduction.py", line 7 in <module>

Extension modules: pygame.base, pygame.constants, pygame.rwobject, pygame.rect, pygame.bufferproxy, pygame.math, pygame.surflock, pygame.surface, pygame.window, pygame.display, pygame.draw, pygame.joystick, pygame.event, pygame.imageext, pygame.image, pygame.key, pygame.mouse, pygame.pixelcopy, pygame.mask, pygame.time, pygame.transform, pygame.font, pygame.mixer_music, pygame.mixer, pygame.scrap, pygame.system, pygame._freetype (total: 27)

[OwenCMYK]

In hindsight I should've used sysfont so you could run the test program right away. But as is you'll need to provide your own font file to reproduce the bug.

[OwenCMYK]

Also ignore that it's called Smoothscale Reproduction. I was originally planning to reproduce a different crash bug, but I can't reproduce it consistently so I haven't reported it yet

[Matiiss]

In hindsight I should've used sysfont so you could run the test program right away. But as is you'll need to provide your own font file to reproduce the bug.

You can just use pygame.Font(None, ...), that'll load the default font that comes bundled with pygame-ce, also, you can edit your messages (i.e., you can still fix that in your issue)

That said, I have narrowed it down to a more specific condition, this seems to happen only for 32-bit (SRCALPHA) surfaces with a width of 0 and a height greater than 0 (i.e., 0 by 0 surfaces won't trigger this):

import pygame

surf = pygame.Surface((0, 1), flags=pygame.SRCALPHA)
pygame.transform.solid_overlay(surf, "white")