From f5db45eaf34adaf2d0bfdcfea7dc825db16c30d0 Mon Sep 17 00:00:00 2001
From: Daniel Abrahamsson <daniel.abrahamsson@prover.com>
Date: Tue, 17 Nov 2020 10:40:27 +0100
Subject: [PATCH 1/2] Ensure methods of Object are also available on interface
 objects

---
 src/runtime/classmanager.cs | 11 +++++++++++
 src/tests/test_interface.py | 11 +++++++++++
 2 files changed, 22 insertions(+)

diff --git a/src/runtime/classmanager.cs b/src/runtime/classmanager.cs
index 26d0536ab..c8bed6bc4 100644
--- a/src/runtime/classmanager.cs
+++ b/src/runtime/classmanager.cs
@@ -341,6 +341,17 @@ private static ClassInfo GetClassInfo(Type type)
                         }
                     }
                 }
+
+                // All interface implementations inherit from Object,
+                // but GetMembers don't return them either.
+                var objFlags = BindingFlags.Public | BindingFlags.Instance;
+                foreach (var mi in typeof(object).GetMembers(objFlags))
+                {
+                    if (local[mi.Name] == null)
+                    {
+                        items.Add(mi);
+                    }
+                }
             }
 
             for (i = 0; i < items.Count; i++)
diff --git a/src/tests/test_interface.py b/src/tests/test_interface.py
index 4546471f2..130bd71c1 100644
--- a/src/tests/test_interface.py
+++ b/src/tests/test_interface.py
@@ -136,3 +136,14 @@ def test_interface_collection_iteration():
     untyped_list.Add(elem)
     for e in untyped_list:
         assert type(e).__name__ == "int"
+
+
+def test_methods_of_Object_are_available():
+    """Test calling methods inherited from Object"""
+    import System
+    clrVal =  System.Int32(100)
+    i = System.IComparable(clrVal)
+    assert i.Equals(clrVal)
+    assert clrVal.GetHashCode() == i.GetHashCode()
+    assert clrVal.GetType() == i.GetType()
+    assert clrVal.ToString() == i.ToString()

From 3aae82951afc67c1c43cb24aa900b563c62d5a80 Mon Sep 17 00:00:00 2001
From: Daniel Abrahamsson <daniel.abrahamsson@prover.com>
Date: Tue, 17 Nov 2020 21:00:18 +0100
Subject: [PATCH 2/2] Add change log

---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f6185b61..0da350cef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -32,6 +32,7 @@ details about the cause of the failure
 -    Indexers can now be used with interface objects
 -    Fixed a bug where indexers could not be used if they were inherited
 -    Made it possible to use `__len__` also on `ICollection<>` interface objects
+-    Made it possible to call `ToString`, `GetHashCode`, and `GetType` on inteface objects
 
 ### Removed