More generic function type cases working

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

Index: pkg/analyzer/lib/src/generated/error_verifier.dart
diff --git a/pkg/analyzer/lib/src/generated/error_verifier.dart b/pkg/analyzer/lib/src/generated/error_verifier.dart
index ca2b9b5aacea9a429872846fce668bc5acef51e4..98afc2e39a70d4d78ea8d238f9526013c6e8ee6d 100644
--- a/pkg/analyzer/lib/src/generated/error_verifier.dart
+++ b/pkg/analyzer/lib/src/generated/error_verifier.dart
@@ -5379,7 +5379,9 @@ class ErrorVerifier extends RecursiveAstVisitor<Object> {
     }
     // name should start with '_'
     SimpleIdentifier name = parameter.identifier;
-    if (name.isSynthetic || !StringUtilities.startsWithChar(name.name, 0x5F)) {
+    if (name == null ||
+        name.isSynthetic ||
+        !StringUtilities.startsWithChar(name.name, 0x5F)) {
       return;
     }