fixes #27586, prefer context type in generic inference

pkg/analyzer/lib/src/dart/element/member.dart

Index: pkg/analyzer/lib/src/dart/element/member.dart
diff --git a/pkg/analyzer/lib/src/dart/element/member.dart b/pkg/analyzer/lib/src/dart/element/member.dart
index 95aafe166d5dba6418db1b6b8f8e0c862d2464f6..15a88d5ec110a0de677b82c0bd74d9cab51d7fa8 100644
--- a/pkg/analyzer/lib/src/dart/element/member.dart
+++ b/pkg/analyzer/lib/src/dart/element/member.dart
@@ -934,6 +934,10 @@ class TypeParameterMember extends Member implements TypeParameterElement {
   TypeParameterType get type => _type;
 
   @override
+  bool operator ==(Object other) =>
+      other is TypeParameterMember && baseElement == other.baseElement;
+
+  @override
   /*=T*/ accept/*<T>*/(ElementVisitor<dynamic/*=T*/ > visitor) =>
       visitor.visitTypeParameterElement(this);