[boost] Weirdness in SVN

Subject: [boost] Weirdness in SVN
From: Marshall Clow (mclow.lists_at_[hidden])
Date: 2013-06-19 09:50:16

Ok, this is quite worrisome to me.

This morning, bug #6136 was reopened:
        https://svn.boost.org/trac/boost/ticket/6136

This is an "unused variable warning" in Boost.DateTime. 
I fixed this bug in the trunk: https://svn.boost.org/trac/boost/changeset/80699
I merged this bug fix (and several others) to the release branch: https://svn.boost.org/trac/boost/changeset/80797

But the files (both trunk and release) appear not to contain the change.
If I do a "svn diff", the changes appear in the diff, but the file doesn't contain the change.

I checked the other files referenced in change set 80797, and they appear to be fine - just this one.

Any idea what could be happening here? 
My only explanation at the moment is that "Subversion is lying to me", and that's both (a) a huge potential problem, and (b) doesn't suggest a course of action.

$ svn diff trunk/boost/date_time/format_date_parser.hpp -r 80698
Index: trunk/boost/date_time/format_date_parser.hpp
===================================================================
--- trunk/boost/date_time/format_date_parser.hpp	(revision 80698)
+++ trunk/boost/date_time/format_date_parser.hpp	(working copy)
@@ -256,7 +256,6 @@
     
     // skip leading whitespace
     while(std::isspace(*sitr) && sitr != stream_end) { ++sitr; } 
-    charT current_char = *sitr;
 
     short year(0), month(0), day(0), day_of_year(0);// wkday(0); 
     /* Initialized the following to their minimum values. These intermediate 
@@ -290,7 +289,6 @@
               }
               wkday = mr.current_match;
               if (mr.has_remaining()) {
-                current_char = mr.last_char();
                 use_current_char = true;
               }
               break;
@@ -310,7 +308,6 @@
               }
               wkday = mr.current_match;
               if (mr.has_remaining()) {
-                current_char = mr.last_char();
                 use_current_char = true;
               }
               break;
@@ -326,7 +323,6 @@
               }
               t_month = month_type(mr.current_match);
               if (mr.has_remaining()) {
-                current_char = mr.last_char();
                 use_current_char = true;
               }
               break;
@@ -342,7 +338,6 @@
               }
               t_month = month_type(mr.current_match);
               if (mr.has_remaining()) {
-                current_char = mr.last_char();
                 use_current_char = true;
               }
               break;
@@ -438,7 +433,6 @@
         itr++;
         if (use_current_char) {
           use_current_char = false;
-          current_char = *sitr;
         }
         else {
           sitr++;
$ svn diff trunk/boost/date_time/format_date_parser.hpp -r 80699
$

-- Marshall

Marshall Clow     Idio Software   <mailto:mclow.lists_at_[hidden]>

A.D. 1517: Martin Luther nails his 95 Theses to the church door and is promptly moderated down to (-1, Flamebait).
        -- Yu Suzuki