TREALLOC         3445 regex.c            TREALLOC(regs->beg, num_regs, int);
TREALLOC         3446 regex.c            TREALLOC(regs->end, num_regs, int);
TREALLOC         4355 regex.c            TREALLOC(regs1->beg, regs2->num_regs, int);
TREALLOC         4356 regex.c            TREALLOC(regs1->end, regs2->num_regs, int);