1 files changed, 16 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/fmt_t_7.f b/gcc/testsuite/gfortran.dg/fmt_t_7.f
new file mode 100644
index 000000000..718668ff4
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/fmt_t_7.f
@@ -0,0 +1,16 @@
+! { dg-do run { target fd_truncate } }
+! PR34974 null bytes when reverse-tabbing long records
+! Test case prepared by Jerry DeLisle <jvdelisle@gcc.gnu.org>
+       program test
+       character(1) :: a, b, c
+       write (10,'(t50000,a,t1,a)') 'b', 'a'
+       close (10)
+       open (10, access="stream")
+       read (10, pos=1) a
+       read (10, pos=50000) b
+       read (10, pos=25474) c
+       close (10, status="delete")
+       if (a /= "a") call abort
+       if (b /= "b") call abort
+       if (c /= " ") call abort
+       end