---- Reported by atsushi@ximian.com 2005-10-28 06:03:03 MST ----

The example code below results in g_assert() failure on resolving virtual
generic method Foo<T>():

--------
class Base
{
        public virtual void Foo<T> () {}
}

class Derived : Base
{
        public override void Foo <T> () {}
}

class Driver
{
        public static void Main ()
        {
                new Derived ().Foo<int> ();
        }
}

Actual Results:

g_assert() fails at 
object.c: line 1288 (mono_object_get_virtual_method): assertion failed (res)


Expected Results:

no run-time error.

How often does this happen? 

consistently.

Additional Information:

This does not seem a gmcs bug; gmcs-compiled one works fine under .NET 2.0.

The entire --trace results (I'm pasting here since it's short):

ENTER: (wrapper runtime-invoke) System.Object:runtime_invoke_void_string
(object,intptr,intptr,intptr)([System.OutOfMemoryException:01281FC0],
0022FD08, 00000000, 01151648, )
. ENTER: System.OutOfMemoryException:.ctor
(string)(this:01281FC0[System.OutOfMemoryException object1288.exe],
[STRING:01280FC8:Out of memory], )
. . ENTER: System.SystemException:.ctor
(string)(this:01281FC0[System.OutOfMemoryException object1288.exe],
[STRING:01280FC8:Out of memory], )
. . . ENTER: System.Exception:.ctor
(string)(this:01281FC0[System.OutOfMemoryException object1288.exe],
[STRING:01280FC8:Out of memory], )
. . . LEAVE: System.Exception:.ctor (string)
. . . ENTER: System.Exception:set_HResult
(int)(this:01281FC0[System.OutOfMemoryException object1288.exe], -2146233087, )
. . . LEAVE: System.Exception:set_HResult (int)
. . LEAVE: System.SystemException:.ctor (string)
. . ENTER: System.Exception:set_HResult
(int)(this:01281FC0[System.OutOfMemoryException object1288.exe], -2147024882, )
. . LEAVE: System.Exception:set_HResult (int)
. LEAVE: System.OutOfMemoryException:.ctor (string)
LEAVE: (wrapper runtime-invoke) System.Object:runtime_invoke_void_string
(object,intptr,intptr,intptr)[OBJECT:00000000]
ENTER: (wrapper runtime-invoke) System.Object:runtime_invoke_void_string
(object,intptr,intptr,intptr)([System.NullReferenceException:01281F88],
0022FD08, 00000000, 01151760, )
. ENTER: System.NullReferenceException:.ctor
(string)(this:01281F88[System.NullReferenceException object1288.exe],
[STRING:01283ED8:A null value was found where
 an object instance was required], )
. . ENTER: System.SystemException:.ctor
(string)(this:01281F88[System.NullReferenceException object1288.exe],
[STRING:01283ED8:A null value was found where an object instance was
required], )
. . . ENTER: System.Exception:.ctor
(string)(this:01281F88[System.NullReferenceException object1288.exe],
[STRING:01283ED8:A null value was found where an object instance was
required], )
. . . LEAVE: System.Exception:.ctor (string)
. . . ENTER: System.Exception:set_HResult
(int)(this:01281F88[System.NullReferenceException object1288.exe],
-2146233087, )
. . . LEAVE: System.Exception:set_HResult (int)
. . LEAVE: System.SystemException:.ctor (string)
. . ENTER: System.Exception:set_HResult
(int)(this:01281F88[System.NullReferenceException object1288.exe],
-2147467261, )
. . LEAVE: System.Exception:set_HResult (int)
. LEAVE: System.NullReferenceException:.ctor (string)
LEAVE: (wrapper runtime-invoke) System.Object:runtime_invoke_void_string
(object,intptr,intptr,intptr)[OBJECT:00000000]
ENTER: (wrapper runtime-invoke) System.Object:runtime_invoke_void_string
(object,intptr,intptr,intptr)([System.StackOverflowException:01281F50],
0022FD08, 00000000, 011517A0, )
. ENTER: System.StackOverflowException:.ctor
(string)(this:01281F50[System.StackOverflowException object1288.exe],
[STRING:01284F50:The requested operation caused a stack overflow.], )
. . ENTER: System.SystemException:.ctor
(string)(this:01281F50[System.StackOverflowException object1288.exe],
[STRING:01284F50:The requested operation caused astack overflow.], )
. . . ENTER: System.Exception:.ctor
(string)(this:01281F50[System.StackOverflowException object1288.exe],
[STRING:01284F50:The requested operation caused a stack overflow.], )
. . . LEAVE: System.Exception:.ctor (string)
. . . ENTER: System.Exception:set_HResult
(int)(this:01281F50[System.StackOverflowException object1288.exe],
-2146233087, )
. . . LEAVE: System.Exception:set_HResult (int)
. . LEAVE: System.SystemException:.ctor (string)
. LEAVE: System.StackOverflowException:.ctor (string)
LEAVE: (wrapper runtime-invoke) System.Object:runtime_invoke_void_string
(object,intptr,intptr,intptr)[OBJECT:00000000]
ENTER: (wrapper runtime-invoke) System.Object:runtime_invoke_void
(object,intptr,intptr,intptr)(00000000, 0022FD28, 00000000, 01151E88, )
. ENTER: Driver:Main ()()
. . ENTER: (wrapper managed-to-native)
System.Object:__icall_wrapper_mono_object_new_ptrfree (intptr)(007388F0, )
. . LEAVE: (wrapper managed-to-native)
System.Object:__icall_wrapper_mono_object_new_ptrfree
(intptr)[.Derived:00CEDFE8]
. . ENTER: Derived:.ctor ()(this:00CEDFE8[.Derived object1288.exe], )
. . . ENTER: Base:.ctor ()(this:00CEDFE8[.Derived object1288.exe], )
. . . LEAVE: Base:.ctor ()
. . LEAVE: Derived:.ctor ()
. . ENTER: (wrapper managed-to-native)
System.Object:__icall_wrapper_compile_generic_method
(object,intptr,intptr)([.Derived:00CEDFE8], 010A2D60, 010A56A8, )



---- Additional Comments From atsushi@ximian.com 2005-10-28 07:53:40 MST ----

It seems that in mono_class_get_overrides_full() tdef->base is 0 for
Derived class, so it just returns without filling overrides.




---- Additional Comments From martin@ximian.com 2005-11-03 03:22:13 MST ----

Fixed in SVN; added gtest-224.cs.


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