--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gfortran.dg/common_11.f90	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,30 @@
+! { dg-do compile }
+!
+! PR fortran/34658
+!
+! Check for more COMMON constrains
+!
+block data
+  implicit none
+  integer :: x, a  ! { dg-warning "Initialized variable 'a' at .1. is in a blank COMMON" }
+  integer :: y = 5, b = 5 ! { dg-warning "Initialized variable 'b' at .1. is in a blank COMMON" }
+  data x/5/, a/5/
+  common // a, b
+  common /a/ x, y
+end block data
+
+subroutine foo()
+  implicit none
+  type t
+    sequence
+    integer :: i = 5
+  end type t
+  type(t) x ! { dg-error "may not have default initializer" }
+  common // x
+end subroutine foo
+
+program test
+  implicit none
+  common /a/ I ! { dg-warning "in COMMON but only in BLOCK DATA initialization" }
+  integer :: I = 43
+end program test