ERROR: Recursion detected calling module 'rec' in file recursion-test-vector.scad, line 6
TRACE: called by 'rec', in file recursion-test-vector.scad, line 8.
TRACE: called by 'rec', in file recursion-test-vector.scad, line 8.
TRACE: called by 'rec', in file recursion-test-vector.scad, line 8.
TRACE: called by 'rec', in file recursion-test-vector.scad, line 8.
TRACE: called by 'rec', in file recursion-test-vector.scad, line 8.
