regression test: getTilesTraversingPoints infinite loop (Puzzlescript Plus Script)

readme.txt

Play this game by pasting the script in https://auroriax.github.io/PuzzleScript/editor.html

script.txt

title regression test: getTilesTraversingPoints infinite loop 
author pancelor

mouse_drag m_drag
mouse_left m_down

========
objects
========

m_down
transparent

m_drag
green
.....
..0..
.000.
..0..
.....

m_prev
red
.....
.....
..0..
.....
.....

player @
blue

background .
black

wall #
brown

=======
legend
=======

=======
sounds
=======

player move 30943107

================
collisionlayers
================

background
wall, player
m_drag
m_down
m_prev

======
rules
======

[m_down] -> [m_drag]

(move player)
[player m_prev | m_drag] -> [> player m_prev | m_drag]

(clean up mouse objects)
[m_drag][m_prev] -> [m_drag][]
[m_drag] -> [m_prev]
[m_down] -> []
(postconditions:
- no m_down
- no m_drag
- either 0 or 1 m_prev exists (only 0 before first click)
)

==============
winconditions
==============

=======
levels
=======

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##....#####
##.......##
###@....###
##......###
##.......##
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