Fix empty op printing, re issue #591

trealla-prolog · Sep 15, 2024 · ad9956c · ad9956c
1 parent e830aae
commit ad9956c
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/print.c b/src/print.c
@@ -161,6 +161,9 @@ static bool op_needs_quoting(module *m, const char *src, int srclen)
 	if (!strcmp(src, "{}") || !strcmp(src, "[]") || !strcmp(src, "!"))
 		return false;
 
+	if (!srclen)
+		return true;
+
 	int ch = peek_char_utf8(src);
 
 	if (iswupper(ch) || iswdigit(ch) || (ch == '_'))