rspamd patch

lua_util.c.patch

diff --git a/src/lua/lua_util.c b/src/lua/lua_util.c
index 222a48f35..ad38e771e 100644
--- a/src/lua/lua_util.c
+++ b/src/lua/lua_util.c
@@ -2471,14 +2471,19 @@ COMPAT53_API void
 luaL_buffinit (lua_State *L, luaL_Buffer_53 *B)
 {
        /* make it crash if used via pointer to a 5.1-style luaL_Buffer */
+#if LUA_VERSION_NUM < 502
        B->b.p = NULL;
        B->b.L = NULL;
        B->b.lvl = 0;
        /* reuse the buffer from the 5.1-style luaL_Buffer though! */
        B->ptr = B->b.buffer;
-       B->capacity = LUAL_BUFFERSIZE;
        B->nelems = 0;
-       B->L2 = L;
+#elif LUA_VERSION_NUM == 502
+        B->ptr = B->b.b;
+       B->nelems = B->b.n;
+#endif
+       B->capacity = LUAL_BUFFERSIZE;
+        B->L2 = L;
 }
 
 
@@ -2494,7 +2499,11 @@ luaL_prepbuffsize (luaL_Buffer_53 *B, size_t s)
                        luaL_error (B->L2, "buffer too large");
                newptr = (char *) lua_newuserdata (B->L2, newcap);
                memcpy(newptr, B->ptr, B->nelems);
+#if LUA_VERSION_NUM < 502
                if (B->ptr != B->b.buffer)
+#elif LUA_VERSION_NUM == 502
+               if (B->ptr != B->b.b)
+#endif
                        lua_replace (B->L2, -2); /* remove old buffer */
                B->ptr = newptr;
                B->capacity = newcap;
@@ -2518,10 +2527,18 @@ luaL_addvalue (luaL_Buffer_53 *B)
        const char *s = lua_tolstring (B->L2, -1, &len);
        if (!s)
                luaL_error (B->L2, "cannot convert value to string");
+#if LUA_VERSION_NUM < 502
        if (B->ptr != B->b.buffer)
+#elif LUA_VERSION_NUM == 502
+       if (B->ptr != B->b.b)
+#endif
                lua_insert (B->L2, -2); /* userdata buffer must be at stack top */
        luaL_addlstring (B, s, len);
+#if LUA_VERSION_NUM < 502
        lua_remove (B->L2, B->ptr != B->b.buffer ? -2 : -1);
+#elif LUA_VERSION_NUM == 502
+       lua_remove (B->L2, B->ptr != B->b.b ? -2 : -1);
+#endif
 }
 
 
@@ -2529,7 +2546,11 @@ COMPAT53_API void
 luaL_pushresult (luaL_Buffer_53 *B)
 {
        lua_pushlstring (B->L2, B->ptr, B->nelems);
+#if LUA_VERSION_NUM < 502
        if (B->ptr != B->b.buffer)
+#elif LUA_VERSION_NUM == 502
+       if (B->ptr != B->b.b)
+#endif
                lua_replace (B->L2, -2); /* remove userdata buffer */
 }