obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
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if you have obtained the source via the command 'git clone',
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1 files changed, 47 insertions, 0 deletions

diff --git a/gcc/testsuite/gfortran.dg/used_dummy_types_6.f90 b/gcc/testsuite/gfortran.dg/used_dummy_types_6.f90
new file mode 100644
index 000000000..ea3905122
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/used_dummy_types_6.f90
@@ -0,0 +1,47 @@
+! { dg-do compile }
+! Tests the fix for PR30554, the USE statements in potential_energy
+! would cause a segfault because the pointer_info for nfree coming
+! from constraint would not find the existing symtree coming directly
+! from atom.
+!
+! The last two modules came up subsequently to the original fix.  The
+! PRIVATE statement caused a revival of the original problem.  This
+! was tracked down to an interaction between the symbols being set
+! referenced during module read and the application of the access
+! attribute.
+!
+! Contributed by Tobias Burnus <burnus@gcc.gnu.org>
+
+MODULE ATOMS
+INTEGER :: NFREE = 0
+END MODULE ATOMS
+
+MODULE CONSTRAINT
+USE ATOMS, ONLY: NFREE
+CONTAINS
+   SUBROUTINE ENERGY_CONSTRAINT ( HESSIAN )
+   REAL , DIMENSION(1:(3*NFREE*(3*NFREE+1))/2):: HESSIAN
+   END SUBROUTINE ENERGY_CONSTRAINT
+END MODULE CONSTRAINT
+
+MODULE POTENTIAL_ENERGY
+USE ATOMS
+USE CONSTRAINT,         ONLY : ENERGY_CONSTRAINT
+END MODULE POTENTIAL_ENERGY
+
+MODULE P_CONSTRAINT
+USE ATOMS, ONLY: NFREE
+PRIVATE
+PUBLIC :: ENERGY_CONSTRAINT
+CONTAINS
+   SUBROUTINE ENERGY_CONSTRAINT ( HESSIAN )
+   REAL , DIMENSION(1:(3*NFREE*(3*NFREE+1))/2):: HESSIAN
+   END SUBROUTINE ENERGY_CONSTRAINT
+END MODULE P_CONSTRAINT
+
+MODULE P_POTENTIAL_ENERGY
+USE ATOMS
+USE CONSTRAINT,         ONLY : ENERGY_CONSTRAINT
+END MODULE P_POTENTIAL_ENERGY
+
+! { dg-final { cleanup-modules "atoms constraint potential_energy p_constraint p_potential_energy" } }