re PR libfortran/68987 (double free or corruption in _gfortran_st_write_done…

re PR libfortran/68987 (double free or corruption in _gfortran_st_write_done when a write statement to an internal file uses an invalid format and the ERR= specifier appears.)

2015-12-28  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libfortran/68987
	io/format.c (format_error): Remove unneeded memory cleanup.

From-SVN: r231989

libgfortran/ChangeLog

+2015-12-28  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR libfortran/68987
+	io/format.c (format_error): Remove unneeded memory cleanup.
+
 2015-12-14  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
-	PR libfortran/pr68867
+	PR libfortran/68867
 	* io/write.c (set_fnode_default): For kind=16, set the decimal precision
 	depending on the platform binary precision, 106 or 113.
 

libgfortran/io/format.c

@@ -1180,26 +1180,6 @@ format_error (st_parameter_dt *dtp, const fnode *f, const char *message)
   *p++ = '^';
   *p = '\0';
 
-  /* Cleanup any left over memory allocations before calling generate
-     error.  */
-  if (is_internal_unit (dtp))
-    {
-      if (dtp->format != NULL)
-	{
-	  free (dtp->format);
-	  dtp->format = NULL;
-	}
-
-      /* Leave these alone if IOSTAT was given because execution will
-	 return from generate error in those cases.  */
-      if (!(dtp->common.flags & IOPARM_HAS_IOSTAT))
-	{
-	  free (dtp->u.p.fmt);
-	  free_format_hash_table (dtp->u.p.current_unit);
-	  free_internal_unit (dtp);
-	}
-    }
-
   generate_error (&dtp->common, LIBERROR_FORMAT, buffer);
 }