ci: add a parser fuzzer step too (#7288)

vlib/v/parser/parse_type.v

@@ -380,7 +380,7 @@ pub fn (mut p Parser) parse_generic_struct_inst_type(name string) table.Type {
 	bs_cname += '_T_'
 	mut generic_types := []table.Type{}
 	mut is_instance := false
-	for {
+	for p.tok.kind != .eof {
 		gt := p.parse_type()
 		if !gt.has_flag(.generic) {
 			is_instance = true

vlib/v/scanner/scanner.v

@@ -233,6 +233,9 @@ fn (mut s Scanner) ident_hex_number() string {
 	mut first_wrong_digit_pos := 0
 	mut first_wrong_digit := `\0`
 	start_pos := s.pos
+	if s.pos + 2 >= s.text.len {
+		return '0x'
+	}
 	s.pos += 2 // skip '0x'
 	if s.text[s.pos] == num_sep {
 		s.error('separator `_` is only valid between digits in a numeric literal')