diff --git a/runtime/parser/lexer/lexer.go b/runtime/parser/lexer/lexer.go
index 5e9caf2f79..e5e224f850 100644
--- a/runtime/parser/lexer/lexer.go
+++ b/runtime/parser/lexer/lexer.go
@@ -140,6 +140,7 @@ func (l *lexer) clear() {
 	l.cursor = 0
 	l.tokens = l.tokens[:0]
 	l.tokenCount = 0
+	l.mode = NORMAL
 }
 
 func (l *lexer) Reclaim() {
diff --git a/runtime/parser/lexer/state.go b/runtime/parser/lexer/state.go
index a5e395a276..315ff25b07 100644
--- a/runtime/parser/lexer/state.go
+++ b/runtime/parser/lexer/state.go
@@ -69,7 +69,7 @@ func rootState(l *lexer) stateFn {
 			l.emitType(TokenBraceOpen)
 			if l.mode == STR_IDENTIFIER {
 				l.mode = STR_EXPRESSION
-			} else {
+			} else if l.mode == STR_EXPRESSION {
 				return l.error(fmt.Errorf("string template cannot contain {"))
 			}
 		case '}':