Index: driver/as.cc
===================================================================
--- driver/as.cc	(revision 1f690b3ef513f4620e8adff0756c4e5f3c028c4f)
+++ driver/as.cc	(revision 9507ce3d1285428daa78aa9b56355c2e4b77f870)
@@ -1,11 +1,11 @@
-// 
+//
 // Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
 //
 // The contents of this file are covered under the licence agreement in the
 // file "LICENCE" distributed with Cforall.
-// 
+//
 // as.c -- map assembler file, scan for debug information. If found, expand file by one character and insert Cforall
 //         language code on the N line from the start of the debug information.
-// 
+//
 // Author           : Peter A. Buhr
 // Created On       : Wed Aug  1 10:49:42 2018
@@ -13,5 +13,5 @@
 // Last Modified On : Sat Sep  8 08:40:16 2018
 // Update Count     : 97
-// 
+//
 
 #include <cstdio>										// perror
@@ -45,5 +45,5 @@
 
 	if ( size ) {										// cannot map 0 sized file
-		char * start = (char *)mmap( NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 );
+		char * start = (char *)mmap( NULL, size + 2, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 );
 		if ( start == (void *)-1 ) { perror( "mmap" ); exit( EXIT_FAILURE ); };
 
@@ -65,5 +65,5 @@
 		} // if
 
-		if ( munmap( start, size ) ) { perror( "munmap" ); exit( EXIT_FAILURE ); }; // update on disk
+		if ( munmap( start, size + 2 ) ) { perror( "munmap" ); exit( EXIT_FAILURE ); }; // update on disk
 	} // if