--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gfortran.dg/null_6.f90	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,34 @@
+! { dg-do compile }
+! { dg-options "-std=f2008" }
+!
+! PR fortran/34547
+! PR fortran/50375
+
+subroutine test_PR50375_3 ()
+  interface gen3
+    subroutine s31 (pi)
+      integer, pointer :: pi
+    end subroutine
+    subroutine s32 (pr)
+      real, allocatable :: pr(:)
+    end subroutine
+  end interface
+  call gen3 (null ()) ! OK
+end subroutine test_PR50375_3
+
+subroutine test_PR50375_2 ()
+  interface gen2
+    subroutine s21 (pi)
+      integer, pointer :: pi
+    end subroutine
+    subroutine s22 (pr)
+      real, optional :: pr
+    end subroutine
+  end interface
+  call gen2 (null ()) ! { dg-error "MOLD= required in NULL|There is no specific subroutine" }
+end subroutine test_PR50375_2
+
+subroutine test_PR34547_3 ()
+  integer, allocatable :: i(:)
+  print *, NULL(i)    ! { dg-error "Invalid context for NULL" }
+end subroutine test_PR34547_3