Segmentation fault on KX_Mesh.transformUV

[vlad0337187]

Just segmentation fault when calling that method.

code:

uv_offset = [0, 0]

def move_clouds ():
	global uv_offset
	import mathutils
	contr		= bge.logic.getCurrentController ()
	obj			= contr.owner

	SPEED_X = 0.1
	SPEED_Y = 0
	# Transform stored original values and write to first channel.
	uv_offset[0] += SPEED_X
	uv_offset[1] += SPEED_Y
	uv_mat = mathutils.Matrix.Translation((uv_offset[0], uv_offset[1], 0))
	obj.meshes[0].transformUV (-1, uv_mat, 0, 1)									# BUG HERE !!!!! <<<<

VIdeo with bug: https://www.youtube.com/watch?v=xM4UTPgwpyc

Steps to reproduce:

• pull repository: hg clone https://vlad1777d@bitbucket.org/new_novel/oasis
• move to bookmark with crash: hg update -r bug/upbge/KX_Mesh.transformUV
  (or checkout to that commit: "b47eda814a4b")
• open scene in upbge: upbge ./scenes/dream_tower/dream_tower.blend
• press P and see a crash

OS: LInux Mint 19 Cinnamon
Kernel: 4.15.0-39-generic
UPBGE: 0.2.4
GPU: Nvidia Geforce GT 840m

P.S. I met near 5 crashes, and some of them are in not often used functions.
I think, maybe not to waste time on fixing this and mark it as "low priority" ?

[lordloki]

@vlad1777d thanks for reporting. We will check it.

[youle31]

hi, I propose this as a fix:
https://drive.google.com/file/d/1SZ3XY-OIPclPmVO5PhzFZx8pdNrCWFMq/view?usp=sharing

[youle31]

test file:
https://drive.google.com/file/d/116OJdaT4d8xskEsEyumGo8PlivMwHx4y/view?usp=sharing

[youle31]

I think my fix is wrong in fact as i think we can have an uv in layer 2 and no uv in layer 0... maybe i'll do another fix later. Anyway this is a minor bug

[youle31]

Bool UvExist(int layer) if !m-vertexdata[layer].size() return false; then throw python error. Smthing like that

[youle31]

This has been fixed by panzergame in last master. Thanks panzergame!

[vlad0337187]

Thank you very much!