Issue 12103. It is warning to provide wrong number of type arguments for list/map literals.

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/parser/Parser.java

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/parser/Parser.java
diff --git a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/parser/Parser.java b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/parser/Parser.java
index 43bf9dc3acfb45738ec5b55f9d3dae71eda4553f..ab8e77ad927dfcf045be11ed3ac0591791b563e2 100644
--- a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/parser/Parser.java
+++ b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/parser/Parser.java
@@ -3668,13 +3668,6 @@ public class Parser {
    * @return the list literal that was parsed
    */
   private ListLiteral parseListLiteral(Token modifier, TypeArgumentList typeArguments) {
-    // validate number of type arguments
-    if (typeArguments != null) {
-      int num = typeArguments.getArguments().size();
-      if (num != 1) {
-        reportError(ParserErrorCode.EXPECTED_ONE_LIST_TYPE_ARGUMENTS, typeArguments, num);
-      }
-    }
     // may be empty list literal
     if (matches(TokenType.INDEX)) {
       BeginToken leftBracket = new BeginToken(
@@ -3790,14 +3783,6 @@ public class Parser {
    * @return the map literal that was parsed
    */
   private MapLiteral parseMapLiteral(Token modifier, TypeArgumentList typeArguments) {
-    // validate number of type arguments
-    if (typeArguments != null) {
-      int num = typeArguments.getArguments().size();
-      if (num != 2) {
-        reportError(ParserErrorCode.EXPECTED_TWO_MAP_TYPE_ARGUMENTS, typeArguments, num);
-      }
-    }
-    // open
     Token leftBracket = expect(TokenType.OPEN_CURLY_BRACKET);
     List<MapLiteralEntry> entries = new ArrayList<MapLiteralEntry>();
     if (matches(TokenType.CLOSE_CURLY_BRACKET)) {