Supresses policy file runtime but messages admins about it.

code/__HELPERS/text.dm

@@ -819,3 +819,10 @@ GLOBAL_LIST_INIT(binary, list("0","1"))
 
 #define is_alpha(X) ((text2ascii(X) <= 122) && (text2ascii(X) >= 97))
 #define is_digit(X) ((length(X) == 1) && (length(text2num(X)) == 1))
+
+//json decode that will return null on parse error instead of runtiming.
+/proc/safe_json_decode(data)
+	try
+		return json_decode(data)
+	catch
+		return

code/controllers/configuration/configuration.dm

@@ -154,7 +154,7 @@
 			var/good_update = istext(new_value)
 			log_config("Entry [entry] is deprecated and will be removed soon. Migrate to [new_ver.name]![good_update ? " Suggested new value is: [new_value]" : ""]")
 			if(!warned_deprecated_configs)
-				addtimer(CALLBACK(GLOBAL_PROC, /proc/message_admins, "This server is using deprecated configuration settings. Please check the logs and update accordingly."), 0)
+				DelayedMessageAdmins("This server is using deprecated configuration settings. Please check the logs and update accordingly.")
 				warned_deprecated_configs = TRUE
 			if(good_update)
 				value = new_value
@@ -271,9 +271,10 @@ Example config:
 	policy = list()
 	var/rawpolicy = file2text("[directory]/policy.json")
 	if(rawpolicy)
-		var/parsed = json_decode(rawpolicy)
+		var/parsed = safe_json_decode(rawpolicy)
 		if(!parsed)
 			log_config("JSON parsing failure for policy.json")
+			DelayedMessageAdmins("JSON parsing failure for policy.json")
 		else
 			policy = parsed
 
@@ -417,3 +418,7 @@ Example config:
 	ic_filter_regex = in_character_filter.len ? regex("\\b([jointext(in_character_filter, "|")])\\b", "i") : null
 
 	syncChatRegexes()
+
+//Message admins when you can.
+/datum/controller/configuration/proc/DelayedMessageAdmins(text)
+	addtimer(CALLBACK(GLOBAL_PROC, /proc/message_admins, text), 0)