From dcc0ab19c24927c52e80849b009aa33e62226616 Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Sun, 11 Sep 2011 11:46:19 -0400
Subject: [PATCH] Bug

- Fixed crash bug on Linux where Command::next_mod_group just walked off
  the end of a vector.
---
 src/commands/Command.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/commands/Command.cpp b/src/commands/Command.cpp
index 624017b5d..ea34a77af 100644
--- a/src/commands/Command.cpp
+++ b/src/commands/Command.cpp
@@ -555,8 +555,9 @@ bool Command::next_mod_group (const A3& input, Arg& arg, unsigned int& pos)
     if (arg._type == Arg::type_date &&
         arg._category == Arg::cat_attr)
     {
-      while (input[pos]._type     == Arg::type_duration ||
-             input[pos]._category == Arg::cat_op)
+      while (pos < input.size () &&
+             (input[pos]._type     == Arg::type_duration ||
+              input[pos]._category == Arg::cat_op))
       {
         arg._raw += " " + input[pos++]._raw;
       }