-
Paul Eggert authored
Fix infinite loops in print.c when a circular list is passed to command-error-default-function or to error-message-string. * src/print.c (print_error_message): Use FOR_EACH_TAIL to avoid infloop on circular lists. (print_object): Use FOR_EACH_TAIL_SAFE, as it uses Brent’s teleporting tortoise-hare algorithm which is asymptotically better than the classic tortoise-hare algorithm that the code wsas using. * test/src/print-tests.el (print-circle-2): When print-circle is nil, do not insist on a particular cycle-detection heuristic. (error-message-string-circular): New test.
f2a72bb8