--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gfortran.dg/dynamic_dispatch_8.f03	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,105 @@
+! { dg-do run }
+!
+! PR 41829: [OOP] Runtime error with dynamic dispatching.  Tests
+! dynamic dispatch in a case where the caller knows nothing about
+! the dynamic type at compile time.
+!
+! Contributed by Salvatore Filippone <sfilippone@uniroma2.it>
+!
+module foo_mod
+  type foo
+    integer :: i 
+  contains
+    procedure, pass(a) :: doit
+    procedure, pass(a) :: getit
+  end type foo
+
+  private doit,getit
+contains
+  subroutine  doit(a) 
+    class(foo) :: a
+    
+    a%i = 1
+!    write(*,*) 'FOO%DOIT base version'
+  end subroutine doit
+  function getit(a) result(res)
+    class(foo) :: a
+    integer :: res
+
+    res = a%i
+  end function getit
+
+end module foo_mod
+module foo2_mod
+  use foo_mod
+
+  type, extends(foo) :: foo2
+    integer :: j
+  contains
+    procedure, pass(a) :: doit  => doit2
+    procedure, pass(a) :: getit => getit2
+  end type foo2
+  
+  private doit2, getit2
+
+contains
+
+  subroutine  doit2(a) 
+    class(foo2) :: a
+    
+    a%i = 2
+    a%j = 3
+!    write(*,*) 'FOO2%DOIT derived version'
+  end subroutine doit2
+  function getit2(a) result(res)
+    class(foo2) :: a
+    integer :: res
+
+    res = a%j
+  end function getit2
+    
+end module foo2_mod
+
+module bar_mod 
+  use foo_mod
+  type bar 
+    class(foo), allocatable :: a
+  contains 
+    procedure, pass(a) :: doit
+    procedure, pass(a) :: getit
+  end type bar
+  private doit,getit
+  
+contains
+  subroutine doit(a)
+    class(bar) :: a
+    
+    call a%a%doit()
+  end subroutine doit
+  function getit(a) result(res)
+    class(bar) :: a
+    integer :: res
+
+    res = a%a%getit()
+  end function getit
+end module bar_mod
+
+
+program testd10
+  use foo_mod
+  use foo2_mod
+  use bar_mod
+  
+  type(bar) :: a
+
+  allocate(foo :: a%a)
+  call a%doit()
+!  write(*,*) 'Getit value : ', a%getit()
+  if (a%getit() .ne. 1) call abort
+  deallocate(a%a)
+  allocate(foo2 :: a%a)
+  call a%doit()
+!  write(*,*) 'Getit value : ', a%getit()
+  if (a%getit() .ne. 3) call abort
+
+end program testd10