From fbeef8ab4f4d19ae048a6460fcdc3c5782e2b132 Mon Sep 17 00:00:00 2001
From: Noel Cragg <noel@squeezehead.com>
Date: Sun, 8 Jul 2018 06:12:15 +0000
Subject: fix invalid self-reference

During the structure rebuild, the 'message' key is removed before its callback
is invoked, causing 'this.message' to raise a nonexistent key error.  This
change reverts the line in question to its pre-84aad729 logic (but leaving the
variable name substitutions in place).
---
 glucometerutils/support/lifescan_binary_protocol.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/glucometerutils/support/lifescan_binary_protocol.py b/glucometerutils/support/lifescan_binary_protocol.py
index 1771dcf..4632a94 100644
--- a/glucometerutils/support/lifescan_binary_protocol.py
+++ b/glucometerutils/support/lifescan_binary_protocol.py
@@ -44,7 +44,7 @@ def LifeScanPacket(command_prefix, include_link_control):
                     'link_control' / link_control_construct,
                     'command_prefix' / command_prefix_construct,
                     'message' / construct.Bytes(
-                        lambda this: len(this.message)),
+                        lambda this: this.length - 7),
                     construct.Const(b'\x03'),  # etx
                 ),
         ),
-- 
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