re PR libfortran/48960 (OPEN statement modifies NEWUNIT variable on error)

2012-12-26  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libfortran/48960
	* io/open.c (st_parameter_open):  Assign newunit number to user
	variable only if the the associated open statement is successful.

From-SVN: r194724

libgfortran/ChangeLog

+2012-12-26  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR libfortran/48960
+	* io/open.c (st_parameter_open):  Assign newunit number to user
+	variable only if the the associated open statement is successful. 
+
 2012-12-26  Janne Blomqvist  <jb@gcc.gnu.org>
 
 	PR fortran/55539

libgfortran/io/open.c

@@ -844,10 +844,7 @@ st_open (st_parameter_open *opp)
   if ((opp->common.flags & IOPARM_LIBRETURN_MASK) == IOPARM_LIBRETURN_OK)
     {
       if ((opp->common.flags & IOPARM_OPEN_HAS_NEWUNIT))
-	{
-	  *opp->newunit = get_unique_unit_number(opp);
-	  opp->common.unit = *opp->newunit;
-	}
+	opp->common.unit = get_unique_unit_number(opp);
 
       u = find_or_create_unit (opp->common.unit);
       if (u->s == NULL)
@@ -859,6 +856,10 @@ st_open (st_parameter_open *opp)
       else
 	already_open (opp, u, &flags);
     }
-
+    
+  if ((opp->common.flags & IOPARM_OPEN_HAS_NEWUNIT)
+      && (opp->common.flags & IOPARM_LIBRETURN_MASK) == IOPARM_LIBRETURN_OK)
+    *opp->newunit = opp->common.unit;
+  
   library_end ();
 }