Fatal crash when changing circle to roundbar with cable already connected

Reproduce:

Checking [ ] is roundbar crashes the program

# auto generated python code
# By MS12H
# Time: 2023-11-29 21:43:30 UTC

# To be able to distinguish the important number (eg: fixed positions) from
# non-important numbers (eg: a position that is solved by the static solver) we use a dummy-function called 'solved'.
# For anything written as solved(number) that actual number does not influence the static solution

def solved(number):
    return number

# Environment settings
s.g = 9.80665
s.waterlevel = 0.0
s.rho_air = 0.00126
s.rho_water = 1.025
s.wind_direction = 0.0
s.wind_velocity = 0.0
s.current_direction = 0.0
s.current_velocity = 0.0

# code for Point
s.new_point(name='Point',
          position=(-2.646,
                    -0.478,
                    4.336))

# code for Point2
s.new_point(name='Point2',
          position=(4.763,
                    -0.416,
                    0.871))

# code for gg
s.new_point(name='gg',
          position=(8.082,
                    4.803,
                    5.227))

# code for Circle
c = s.new_circle(name='Circle',
            parent='Point',
            axis=(0, 1, 0),
            radius=1 )

# code for Circle2
c = s.new_circle(name='Circle2',
            parent='Point2',
            axis=(0, 1, 0),
            radius=1 )

# code for Circle3
c = s.new_circle(name='Circle3',
            parent='gg',
            axis=(0, 1, 0),
            radius=1 )

# code for Cable
s.new_cable(name='Cable',
            endA='Circle3',
            endB='Circle3',
            length=26.3797,
            EA=0.0,
            sheaves = ['Circle',
                       'Circle2',
                       'Circle',
                       'Circle2'])

# Limits

# Watches

# Tags

# Colors
# Timeline
t = TimeLine(s)
s.t = t  # and register timeline in scene

RubendeBruin / DAVE

Fatal crash when changing circle to roundbar with cable already connected #144