Exception during clearing object in test case v3d/raytrace/connected in DEBUG mode

Exception appears during clearing object when vraytrace 0 on Windows in DEBUG mode on current master CR670-IR-master-occt-deb.

Test case v3d/raytrace/connected:
box b1 0 0 0 1 2 3
box b2 3 0 0 3 2 1
vinit View1
vactivate Driver1/Viewer1/View1
vactivate: the view is active already

vactivate: the view is active already

vclear
vsetdispmode 1
vraytrace 0
vaxo
vconnectsh b1c -3 0 0 1 0 0 0 0 1 b1 b2
vfit
vrotate 0.2 0.0 0.0
vclear
Remove b1c
An exception was caught 0068052C : OSD_Exception_ACCESS_VIOLATION: ACCESS VIOLATION at address 0xDDDDDDE1 during 'READ' operation

** Exception ** 0068052C : OSD_Exception_ACCESS_VIOLATION: ACCESS VIOLATION at address 0xDDDDDDE1 during 'READ' operation