Update lex.go (#1517)
Fixing printing error, printing rune instead of integer
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diff --git a/build/lex.go b/build/lex.go
index 8e5b359..2c517d0 100644
--- a/build/lex.go
+++ b/build/lex.go
@@ -698,7 +698,7 @@
// Checked all punctuation. Must be identifier token.
if c := in.peekRune(); !isIdent(c) {
- in.Error(fmt.Sprintf("unexpected input character %#q", c))
+ in.Error(fmt.Sprintf("unexpected input character %#q", rune(c)))
}
// Scan over alphanumeric identifier.
