INIT_MATCH_STACK_SIZE 1569 regexec.c        STACK_INIT(alloca_base, xmalloc_base, n, INIT_MATCH_STACK_SIZE);
INIT_MATCH_STACK_SIZE 1580 regexec.c        STACK_INIT(alloca_base, xmalloc_base, n, INIT_MATCH_STACK_SIZE);