From: Jerry DeLisle <jvdelisle@gcc.gnu.org>
Date: Tue, 26 Mar 2024 23:44:17 +0000 (-0700)
Subject: libgfortran: Fix file position after ENDFILE statement.
X-Git-Tag: basepoints/gcc-15~458
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41e767c482fc903ca5d54014b034c7526dbf8f1c;p=thirdparty%2Fgcc.git

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.
---

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);