Index: pkg/compiler/lib/src/io/position_information.dart |
diff --git a/pkg/compiler/lib/src/io/position_information.dart b/pkg/compiler/lib/src/io/position_information.dart |
index 22414a023317f88f13cbee9c556d96240b59de5f..31c545c20d999f9700d68dd860ba293f1a6dccce 100644 |
--- a/pkg/compiler/lib/src/io/position_information.dart |
+++ b/pkg/compiler/lib/src/io/position_information.dart |
@@ -234,7 +234,8 @@ class CodePosition { |
/// Registry for mapping [js.Node]s to their [CodePosition]. |
class CodePositionRecorder { |
- Map<js.Node, CodePosition> _codePositionMap = <js.Node, CodePosition>{}; |
+ Map<js.Node, CodePosition> _codePositionMap = |
+ new Map<js.Node, CodePosition>.identity(); |
void registerPositions(js.Node node, |
int startPosition, |