improve parser recovery of type argument list

pkg/analyzer/lib/src/generated/parser.dart

Index: pkg/analyzer/lib/src/generated/parser.dart
diff --git a/pkg/analyzer/lib/src/generated/parser.dart b/pkg/analyzer/lib/src/generated/parser.dart
index 47371ef48f0160a27226a66a174f6d3bd443544d..b303cc75d263e2eab566f487c99176c956a4c00c 100644
--- a/pkg/analyzer/lib/src/generated/parser.dart
+++ b/pkg/analyzer/lib/src/generated/parser.dart
@@ -7974,6 +7974,12 @@ class Parser {
     }
     token = _skipTypeName(token.next);
     if (token == null) {
+      // If the start token '<' is followed by '>'
+      // then assume this should be type argument list but is missing a type
+      token = startToken.next;
+      if (_tokenMatches(token, TokenType.GT)) {
+        return token.next;
+      }
       return null;
     }
     while (_tokenMatches(token, TokenType.COMMA)) {