parser: fix silent errors (#7271)

.github/workflows/ci.yml

@@ -612,3 +612,5 @@ jobs:
         ./v test-parser examples/cli.v
         ./v test-parser examples/json.v
         ./v test-parser examples/vmod.v
+        ./v test-parser examples/regex_example.v
+        ./v test-parser examples/2048/2048.v

examples/2048/2048.v

@@ -47,7 +47,7 @@ struct Theme {
 }
 
 const (
-	themes                = [
+	themes = [
 		&Theme{
 			bg_color: gx.rgb(250, 248, 239)
 			padding_color: gx.rgb(143, 130, 119)

vlib/v/parser/containers.v

@@ -38,7 +38,7 @@ fn (mut p Parser) array_init() ast.ArrayInit {
 		}
 	} else {
 		// [1,2,3] or [const]byte
-		for i := 0; p.tok.kind != .rsbr; i++ {
+		for i := 0; p.tok.kind !in [.rsbr, .eof]; i++ {
 			exprs << p.expr(0)
 			ecmnts << p.eat_comments()
 			if p.tok.kind == .comma {

vlib/v/parser/parse_type.v

@@ -14,6 +14,10 @@ pub fn (mut p Parser) parse_array_type() table.Type {
 		p.next()
 		p.check(.rsbr)
 		elem_type := p.parse_type()
+		if elem_type.idx() == 0 {
+			// error is handled by parse_type
+			return 0
+		}
 		// sym := p.table.get_type_symbol(elem_type)
 		idx := p.table.find_or_register_array_fixed(elem_type, size, 1)
 		return table.new_type(idx)
@@ -72,7 +76,7 @@ pub fn (mut p Parser) parse_chan_type() table.Type {
 pub fn (mut p Parser) parse_multi_return_type() table.Type {
 	p.check(.lpar)
 	mut mr_types := []table.Type{}
-	for {
+	for p.tok.kind != .eof {
 		mr_type := p.parse_type()
 		mr_types << mr_type
 		if p.tok.kind == .comma {
@@ -219,7 +223,7 @@ pub fn (mut p Parser) parse_any_type(language table.Language, is_ptr bool, check
 		p.check(.dot)
 		// prefix with full module
 		name = '${p.imports[name]}.$p.tok.lit'
-		if !p.tok.lit[0].is_capital() {
+		if p.tok.lit.len > 0 && !p.tok.lit[0].is_capital() {
 			p.error('imported types must start with a capital letter')
 			return 0
 		}

vlib/v/parser/parser.v

@@ -2102,7 +2102,7 @@ fn (mut p Parser) assoc() ast.Assoc {
 	mut fields := []string{}
 	mut vals := []ast.Expr{}
 	p.check(.pipe)
-	for {
+	for p.tok.kind != .eof {
 		fields << p.check_name()
 		p.check(.colon)
 		expr := p.expr(0)

vlib/v/scanner/scanner.v

@@ -890,10 +890,12 @@ fn (mut s Scanner) text_scan() token.Token {
 				if nextc == `=` {
 					s.pos++
 					return s.new_token(.ne, '', 2)
-				} else if nextc == `i` && s.text[s.pos + 2] == `n` && s.text[s.pos + 3].is_space() {
+				} else if s.text.len > s.pos + 3 &&
+					nextc == `i` && s.text[s.pos + 2] == `n` && s.text[s.pos + 3].is_space() {
 					s.pos += 2
 					return s.new_token(.not_in, '', 3)
-				} else if nextc == `i` && s.text[s.pos + 2] == `s` && s.text[s.pos + 3].is_space() {
+				} else if s.text.len > s.pos + 3 &&
+					nextc == `i` && s.text[s.pos + 2] == `s` && s.text[s.pos + 3].is_space() {
 					s.pos += 2
 					return s.new_token(.not_is, '', 3)
 				} else {
@@ -943,7 +945,7 @@ fn (mut s Scanner) text_scan() token.Token {
 					start := s.pos + 2
 					mut nest_count := 1
 					// Skip comment
-					for nest_count > 0 {
+					for nest_count > 0 && s.pos < s.text.len - 1 {
 						s.pos++
 						if s.pos >= s.text.len {
 							s.line_nr--