commandDispatcher: handle errors

src/lib/commandDispatcher.js

@@ -83,7 +83,8 @@ async function CommandDispatcher(msg) {
 
     const response = await runCommand(msg, cmd, line, args);
     if (response != null) {
-      msg.channel.createMessage(
+      msg.channel
+        .createMessage(
           Object.assign(
             typeof response === "string" ? {content: response} : response,
             {
@@ -96,7 +97,18 @@ async function CommandDispatcher(msg) {
             }
           ),
           response.file
-      );
+        )
+        .catch((e) => {
+          msg.channel.createMessage({
+            content: `:warning: An error has occurred:\n\`\`\`${e}\`\`\``,
+            allowedMentions: {
+              repliedUser: false,
+            },
+            messageReference: {
+              messageID: msg.id,
+            },
+          });
+        });
     }
     msg.hasRan = true;
   }