Fix segfault

https://github.com/hexchat/hexchat/issues/2265

plugins/lua/lua.c

@@ -404,6 +404,12 @@ static int api_hexchat_hook_print(lua_State *L)
 	lua_pushvalue(L, 2);
 	ref = luaL_ref(L, LUA_REGISTRYINDEX);
 	pri = luaL_optinteger(L, 3, HEXCHAT_PRI_NORM);
+	/* we rely on Close Context pri=INT_MIN for internal stuff. this avoids issues. */
+	if (pri == INT_MIN && strcmp(event, "Close Context"))
+	{
+		hexchat_print(ph, "Warning: Attempted to hook Close Context with priority INT_MIN. Adjusting to INT_MIN+1.");
+		pri = INT_MIN + 1;
+	}
 	info = g_new(hook_info, 1);
 	info->state = L;
 	info->ref = ref;

src/common/plugin.c

@@ -541,10 +541,13 @@ static int
 plugin_hook_run (session *sess, char *name, char *word[], char *word_eol[],
 				 hexchat_event_attrs *attrs, int type)
 {
+	/* fix segfault https://github.com/hexchat/hexchat/issues/2265 */
+	static int depth = 0;
 	GSList *list, *next;
 	hexchat_hook *hook;
 	int ret, eat = 0;
 
+	depth++;
 	list = hook_list;
 	while (1)
 	{
@@ -590,18 +593,22 @@ plugin_hook_run (session *sess, char *name, char *word[], char *word_eol[],
 	}
 
 xit:
-	/* really remove deleted hooks now */
-	list = hook_list;
-	while (list)
+	depth--;
+	if (!depth)
 	{
-		hook = list->data;
-		next = list->next;
-		if (!hook || hook->type == HOOK_DELETED)
+		/* really remove deleted hooks now */
+		list = hook_list;
+		while (list)
 		{
-			hook_list = g_slist_remove (hook_list, hook);
-			g_free (hook);
+			hook = list->data;
+			next = list->next;
+			if (!hook || hook->type == HOOK_DELETED)
+			{
+				hook_list = g_slist_remove (hook_list, hook);
+				g_free (hook);
+			}
+			list = next;
 		}
-		list = next;
 	}
 
 	return eat;