From 41e767c482fc903ca5d54014b034c7526dbf8f1c Mon Sep 17 00:00:00 2001
From: Jerry DeLisle <jvdelisle@gcc.gnu.org>
Date: Tue, 26 Mar 2024 16:44:17 -0700
Subject: [PATCH] libgfortran: Fix file position after ENDFILE statement.
PR libfortran/107031
libgfortran/ChangeLog:
* io/file_pos.c (st_endfile): Remove call to next_record().
gcc/testsuite/ChangeLog:
* gfortran.dg/endfile_5.f90: New test.
---
gcc/testsuite/gfortran.dg/endfile_5.f90 | 30 +++++++++++++++++++++++++
libgfortran/io/file_pos.c | 1 -
2 files changed, 30 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gfortran.dg/endfile_5.f90
diff --git a/gcc/testsuite/gfortran.dg/endfile_5.f90 b/gcc/testsuite/gfortran.dg/endfile_5.f90
new file mode 100644
index 000000000000..90eaa6b2e5b9
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/endfile_5.f90
@@ -0,0 +1,30 @@
+! { dg-do run }
+! PR107031 Check that endfile truncates at end of record 5.
+program test_truncate
+ integer :: num_rec, tmp, i, nr, j
+ open(10, file="in.dat", action='readwrite')
+
+ do i=1,10
+ write(10, *) i
+ end do
+
+ rewind (10)
+
+ num_rec = 5
+ i = 1
+ ioerr = 0
+ do while (i <= num_rec .and. ioerr == 0)
+ read(10, *, iostat=ioerr) tmp
+ i = i + 1
+ enddo
+ endfile(10)
+ rewind (10)
+ i = 0
+ ioerr = 0
+ do while (i <= num_rec + 1 .and. ioerr == 0)
+ read(10, *, iostat=ioerr) j
+ i = i + 1
+ end do
+ close(10, status='delete')
+ if (i - 1 /= 5) stop 1
+end program test_truncate
diff --git a/libgfortran/io/file_pos.c b/libgfortran/io/file_pos.c
index 2bc05b293f8c..d169961f9971 100644
--- a/libgfortran/io/file_pos.c
+++ b/libgfortran/io/file_pos.c
@@ -352,7 +352,6 @@ st_endfile (st_parameter_filepos *fpp)
dtp.common = fpp->common;
memset (&dtp.u.p, 0, sizeof (dtp.u.p));
dtp.u.p.current_unit = u;
- next_record (&dtp, 1);
}
unit_truncate (u, stell (u->s), &fpp->common);
--
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