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
should provide you with a source tree that is binary identical
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if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 25 insertions, 0 deletions

diff --git a/gcc/testsuite/gfortran.dg/bounds_check_strlen_7.f90 b/gcc/testsuite/gfortran.dg/bounds_check_strlen_7.f90
new file mode 100644
index 000000000..9f08ba1ca
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/bounds_check_strlen_7.f90
@@ -0,0 +1,25 @@
+! { dg-do run }
+! { dg-options "-fbounds-check" }
+! { dg-shouldfail "Character length mismatch" }
+
+! PR fortran/37746
+! Test bounds-checking for string length of dummy arguments.
+
+MODULE m
+CONTAINS
+
+  SUBROUTINE test (opt)
+    IMPLICIT NONE
+    CHARACTER(len=5), OPTIONAL :: opt
+  END SUBROUTINE test
+
+END MODULE m
+
+PROGRAM main
+  USE m
+  IMPLICIT NONE
+  CALL test ('') ! 0 length, but not absent argument.
+END PROGRAM main
+
+! { dg-output "shorter than the declared one for dummy argument 'opt' \\(0/5\\)" }
+! { dg-final { cleanup-modules "m" } }