--- gcc/fortran/trans-decl.c.jj	2013-01-11 09:02:50.000000000 +0100
+++ gcc/fortran/trans-decl.c	2013-01-21 18:11:39.684529593 +0100
@@ -1397,6 +1397,12 @@ gfc_get_symbol_decl (gfc_symbol * sym)
 	DECL_IGNORED_P (decl) = 1;
     }
 
+  if (sym->attr.select_type_temporary)
+    {
+      DECL_ARTIFICIAL (decl) = 1;
+      DECL_IGNORED_P (decl) = 1;
+    }
+
   if (sym->attr.dimension || sym->attr.codimension)
     {
       /* Create variables to hold the non-constant bits of array info.  */
@@ -1496,7 +1502,8 @@ gfc_get_symbol_decl (gfc_symbol * sym)
       && POINTER_TYPE_P (TREE_TYPE (decl))
       && !sym->attr.pointer
       && !sym->attr.allocatable
-      && !sym->attr.proc_pointer)
+      && !sym->attr.proc_pointer
+      && !sym->attr.select_type_temporary)
     DECL_BY_REFERENCE (decl) = 1;
 
   if (sym->attr.vtab
--- gcc/testsuite/gfortran.dg/gomp/pr56052.f90.jj	2013-01-21 18:14:38.716547446 +0100
+++ gcc/testsuite/gfortran.dg/gomp/pr56052.f90	2013-01-21 18:14:59.425432249 +0100
@@ -0,0 +1,16 @@
+! PR fortran/56052
+! { dg-do compile }
+! { dg-options "-fopenmp" }
+
+subroutine middle(args)
+  type args_t
+  end type
+  type, extends(args_t) :: scan_args_t
+  end type
+  class(args_t),intent(inout) :: args
+  !$omp single
+    select type (args)
+      type is (scan_args_t)
+    end select
+  !$omp end single
+end subroutine middle