bugfix: parse expect error when mis match braces (#421)

* bugfix: parse expect error when mis match braces

Change-Id: Iba1ad456d5b020375bb0416f44fb54bc2e346d62

* fix wrong test case in vm_test

Change-Id: Idcdaf7ecc93eb61d374249d11282b8286557d30d

---------

Co-authored-by: lihongyuan <lihongyuan.adrian@bytedance.com>

parser/parser.go

@@ -143,6 +143,7 @@ func (p *Parser) ParseFile() (file *File, err error) {
 	}
 
 	stmts := p.parseStmtList()
+	p.expect(token.EOF)
 	if p.errors.Len() > 0 {
 		return nil, p.errors.Err()
 	}

parser/parser_test.go

@@ -1631,6 +1631,20 @@ func TestParseFloat(t *testing.T) {
 	}
 }
 
+func TestMismatchBrace(t *testing.T) {
+	expectParseError(t, `
+fmt := import("fmt")
+out := 0
+if 3 == 1 {
+	out = 1
+}
+} else {
+	out = 2
+}
+fmt.println(out)
+	`)
+}
+
 func TestParseNumberExpressions(t *testing.T) {
 	expectParse(t, `0x15e+2`, func(p pfn) []Stmt {
 		return stmts(

vm_test.go

@@ -2754,10 +2754,10 @@ export func(a) {
 		Opts().Module("mod0", `if 1 { } else { export true }`),
 		tengo.UndefinedValue)
 	expectRun(t, `out = import("mod0")`,
-		Opts().Module("mod0", `for v:=0;;v++ { if v == 3 { export true } } }`),
+		Opts().Module("mod0", `for v:=0;;v++ { if v == 3 { export true } }`),
 		true)
 	expectRun(t, `out = import("mod0")`,
-		Opts().Module("mod0", `for v:=0;;v++ { if v == 3 { break } } }`),
+		Opts().Module("mod0", `for v:=0;;v++ { if v == 3 { break } }`),
 		tengo.UndefinedValue)
 
 	// duplicate compiled functions