1 files changed, 46 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/class_allocate_6.f03 b/gcc/testsuite/gfortran.dg/class_allocate_6.f03
new file mode 100644
index 000000000..8b96d1db2
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/class_allocate_6.f03
@@ -0,0 +1,46 @@
+! { dg-do run }
+!
+! PR 46174: [OOP] ALLOCATE with SOURCE: Deep copy missing
+!
+! Contributed by Tobias Burnus <burnus@gcc.gnu.org>
+
+implicit none
+type t
+end type t
+
+type, extends(t) :: t2
+  integer, allocatable :: a(:)
+end type t2
+
+class(t), allocatable :: x, y
+integer :: i
+
+allocate(t2 :: x)
+select type(x)
+ type is (t2)
+   allocate(x%a(10))
+   x%a = [ (i, i = 1,10) ]
+   print '(*(i3))', x%a
+ class default
+   call abort()
+end select
+
+allocate(y, source=x)
+
+select type(x)
+ type is (t2)
+   x%a = [ (i, i = 11,20) ]
+   print '(*(i3))', x%a
+ class default
+   call abort()
+end select
+
+select type(y)
+ type is (t2)
+   print '(*(i3))', y%a
+   if (any (y%a /= [ (i, i = 1,10) ])) call abort()
+ class default
+   call abort()
+end select
+
+end