More update in /dev/defaultintf (#11693)

* Support non-virtual calls on interface private members correctly
* Support protected methods
* Properly handle precode
* Throw (tentative) exception when seeing conflict overrides and add a test case

(This updates CoreCLR dev/defaultintf the same with the build we are showing at //build)

1 files changed, 5 insertions, 2 deletions

diff --git a/src/vm/methodtable.cpp b/src/vm/methodtable.cpp
index 7247dd06eb..42cb886b1c 100644
--- a/src/vm/methodtable.cpp
+++ b/src/vm/methodtable.cpp
@@ -7069,8 +7069,11 @@ BOOL MethodTable::FindDefaultMethod(
                         }
                         else
                         {
-                            // not good. we have a conflict
-                            COMPlusThrow(kNotSupportedException);
+                            if (!pBestCandidateMT->CanCastToInterface(pCurMT))
+                            {
+                                // not good. we have a conflict 
+                                COMPlusThrow(kNotSupportedException);
+                            }
                         }
                     }
                 }