Hi Joh-Tob, > Doesn't 'circ? also set the gc bit?
Well observed!! That't true, but it is the "other" mark bit. While gc uses the bit in the CDR or (X CDR) 1 # Set mark bit uses 'circ' the one in the CAR of the cell or (A) 1 # Mark > Could it be possible that 'circ? evaluates a term which accesses something > with a changed pointer? The bits are only set after all evaluation is done, and the raw circ detection processing runs. Then the bits are cleared (as after garbage collection too). ♪♫ Alex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
