BASIC_STACK_SIZE  250 lib/lua/lgc.c        2*(BASIC_STACK_SIZE+EXTRA_STACK) < L->stacksize)
BASIC_STACK_SIZE   49 lib/lua/lstate.c   L1->stack = luaM_newvector(L, BASIC_STACK_SIZE + EXTRA_STACK, TValue);
BASIC_STACK_SIZE   50 lib/lua/lstate.c   L1->stacksize = BASIC_STACK_SIZE + EXTRA_STACK;