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Fix argumentless receive call on Lua 5.4 #331

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It seems that on Lua 5.4 when calling conn:receive() without arguments,
a lightuserdata related to the luaL_Buffer ends up in position 2. Since
this is not a number, luaL_optstring() complains.
This commit is contained in:
Kim Alvefur 2021-10-17 15:30:22 +02:00
parent 5b18e475f3
commit 2a6427a6ac
1 changed files with 3 additions and 1 deletions
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4
src/buffer.c
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@ -113,7 +113,9 @@ int buffer_meth_receive(lua_State *L, p_buffer buf) {
luaL_buffinit(L, &b);
luaL_addlstring(&b, part, size);
/* receive new patterns */
if (!lua_isnumber(L, 2)) {
if(top < 2){
err = recvline(buf, &b);
} else if (!lua_isnumber(L, 2)) {
const char *p= luaL_optstring(L, 2, "*l");
if (p[0] == '*' && p[1] == 'l') err = recvline(buf, &b);
else if (p[0] == '*' && p[1] == 'a') err = recvall(buf, &b);