Interesting. On my 32-bit PPC Mac, it failed the first time at 1602; the second time I ran it under gdb and found that it failed at
Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_PROTECTION_FAILURE at address: 0x00000003 0x0015171c in ___garbage_collect ()
Perhaps it's a garbage collection problem; I'll rebuild gambit with - g to get more data ...
Brad
PS: I killed it on my 64-bit opteron with i=934190 without failure.