use scanner.Buffer() to make stdin able to parse hellish giant events up to 256kb (the default was 64kb).

event.go

@@ -169,6 +169,7 @@ example:
 					tags = append(tags, tag)
 				}
 			}
+
 			for _, etag := range c.StringSlice("e") {
 				tags = append(tags, []string{"e", etag})
 				mustRehashAndResign = true

helpers.go

@@ -64,6 +64,7 @@ func writeStdinLinesOrNothing(ch chan string) (hasStdinLines bool) {
 		// piped
 		go func() {
 			scanner := bufio.NewScanner(os.Stdin)
+			scanner.Buffer(make([]byte, 16*1024), 256*1024)
 			for scanner.Scan() {
 				ch <- strings.TrimSpace(scanner.Text())
 			}