re PR fortran/83057 (OPEN without a filename and without STATUS='SCRATCH' could produce a warning)

2019-02-22  Harald Anlauf  <anlauf@gmx.de>

	PR fortran/83057
	* io.c (gfc_match_open): Fix logic in checks of OPEN statement
	when NEWUNIT= is specified.

	PR fortran/83057
	* gfortran.dg/newunit_6.f90: New test.

From-SVN: r269134

gcc/fortran/ChangeLog

+2019-02-22  Harald Anlauf  <anlauf@gmx.de>
+
+	PR fortran/83057
+	* io.c (gfc_match_open): Fix logic in checks of OPEN statement
+	when NEWUNIT= is specified.
+
 2019-02-22  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/89431

gcc/fortran/io.c

@@ -2504,16 +2504,15 @@ gfc_match_open (void)
 	  goto cleanup;
 	}
 
-      if (!open->file && open->status)
-        {
-	  if (open->status->expr_type == EXPR_CONSTANT
+      if (!open->file &&
+	  (!open->status ||
+	   (open->status->expr_type == EXPR_CONSTANT
 	     && gfc_wide_strncasecmp (open->status->value.character.string,
-				       "scratch", 7) != 0)
-	   {
+				      "scratch", 7) != 0)))
+	{
 	     gfc_error ("NEWUNIT specifier must have FILE= "
 			"or STATUS='scratch' at %C");
 	     goto cleanup;
-	   }
 	}
     }
   else if (!open->unit)

gcc/testsuite/ChangeLog

+2019-02-22  Harald Anlauf  <anlauf@gmx.de>
+
+	PR fortran/83057
+	* gfortran.dg/newunit_6.f90: New test.
+
 2019-02-22  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/89420 - ICE with CAST_EXPR in explicit-specifier.

gcc/testsuite/gfortran.dg/newunit_6.f90

+! { dg-do compile }
+!
+! PR fortran/83057 - OPEN without a filename and without STATUS='SCRATCH'
+!                    could produce a warning
+
+  open(newunit=iun,file="file")         ! this is ok
+  open(newunit=jun,status="scratch")    ! this too
+  open(newunit=lun)             ! { dg-error "NEWUNIT specifier must have" }
+end