diff --git a/BitKeeper/etc/collapsed b/BitKeeper/etc/collapsed
index 226f0f1a2e2..ddaafba882c 100644
--- a/BitKeeper/etc/collapsed
+++ b/BitKeeper/etc/collapsed
@@ -17,3 +17,5 @@
 452a92d0-31-8wSzSfZi165fcGcXPA
 454a7ef8gdvE_ddMlJyghvOAkKPNOQ
 454f8960jsVT_kMKJtZ9OCgXoba0xQ
+4554a95d7txO1DuO9G3nAizI3SkFAA
+4554b3722d71SbPiI2Gx-RhbZjmuIQ
diff --git a/client/mysql_upgrade.c b/client/mysql_upgrade.c
index deeeb47851d..849cef2287c 100644
--- a/client/mysql_upgrade.c
+++ b/client/mysql_upgrade.c
@@ -386,18 +386,18 @@ find_file(const char *name, const char *root, uint flags, char *result, size_t l
 
   cp= strmake(result, root, len);
   if (cp[-1] != FN_LIBCHAR) 
-    *cp= FN_LIBCHAR; 
+    *cp++= FN_LIBCHAR; 
   
   ret= 1;
   va_start(va, len);
   subdir= (!(flags & MY_SEARCH_SELF)) ? va_arg(va, char *) : "";
-  while (ret && subdir)
+  while (subdir)
   {
     MY_DIR *dir;
     FILEINFO *match;
     char *cp1;
     
-    cp1= strnmov(cp + 1, subdir, len - (cp - result) - 1);
+    cp1= strnmov(cp, subdir, len - (cp - result) - 1);
     
     dir= my_dir(result, (flags & MY_ISDIR) ? MY_WANT_STAT : MYF(0));  
     if (dir) 
@@ -406,25 +406,20 @@ find_file(const char *name, const char *root, uint flags, char *result, size_t l
                       sizeof(FILEINFO), (qsort_cmp)comp_names);
       if (match)
       {
-        if (!(flags & MY_PARENT)) 
-        {
-          if (cp1[-1] != FN_LIBCHAR)  
+        ret= (flags & MY_ISDIR) ? !MY_S_ISDIR(match->mystat->st_mode) : 0;
+        if (!ret)
+        { 
+          if (cp1[-1] != FN_LIBCHAR)
             *cp1++= FN_LIBCHAR;
-          strnmov(cp1, name, len - (cp1 - result));
+          
+          if (!(flags & MY_PARENT)) 
+            strnmov(cp1, name, len - (cp1 - result));
+          else
+            *cp1= '\0';
+          
+          my_dirend(dir);
+          break;
         }
-        else
-        {
-          if (cp1[-1] == FN_LIBCHAR)
-            --cp1;
-          while (*--cp1 == FN_LIBCHAR)
-          {}
-          *++cp1= FN_LIBCHAR;
-          *++cp1= '\0';
-        }
-        if (flags & MY_ISDIR)
-          ret= !MY_S_ISDIR(match->mystat->st_mode);
-        else
-          ret= 0;
       }
       my_dirend(dir);
     }
@@ -484,7 +479,7 @@ int main(int argc, char **argv)
        || find_file(mysqld_name, basedir, MYF(0), path, sizeof(path),
                               "bin", "libexec", NullS))
     {
-      my_strdup((gptr)basedir, MYF(0));
+      my_free((gptr)basedir, MYF(0));
       basedir= (char *)DEFAULT_MYSQL_HOME;
     }
   }
diff --git a/mysql-test/include/report-features.test b/mysql-test/include/report-features.test
new file mode 100644
index 00000000000..df395f6e3f0
--- /dev/null
+++ b/mysql-test/include/report-features.test
@@ -0,0 +1,11 @@
+#
+# show server variables
+#
+
+--disable_query_log
+--echo ===== ENGINES =====
+show engines; 
+--echo ===== VARIABLES =====
+show variables; 
+--echo ===== STOP =====
+--enable_query_log
diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl
index f47f06729d6..11492207a3e 100755
--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -220,6 +220,7 @@ our $opt_ndbcluster_port_slave;
 our $opt_ndbconnectstring_slave;
 
 our $opt_record;
+our $opt_report_features;
 our $opt_check_testcases;
 
 our $opt_skip;
@@ -427,10 +428,14 @@ sub main () {
     if ( ! $need_im )
     {
      $opt_skip_im= 1;
-   }
+    }
 
     initialize_servers();
 
+    if ( $opt_report_features ) {
+      run_report_features();
+    }
+
     run_suite($opt_suite, $tests);
   }
 
@@ -595,6 +600,7 @@ sub command_line_setup () {
              'mem'                      => \$opt_mem,
 
              # Misc
+             'report-features'          => \$opt_report_features,
              'comment=s'                => \$opt_comment,
              'debug'                    => \$opt_debug,
              'fast'                     => \$opt_fast,
@@ -4255,6 +4261,43 @@ sub run_check_testcase ($$) {
   return $res;
 }
 
+##############################################################################
+#
+#  Report the features that were compiled in
+#
+##############################################################################
+
+sub run_report_features () {
+  my $args;
+
+  if ( ! $glob_use_embedded_server )
+  {
+    mysqld_start($master->[0],[],[]);
+    if ( ! $master->[0]->{'pid'} )
+    {
+      mtr_error("Can't start the mysqld server");
+    }
+    mysqld_wait_started($master->[0]);
+  }
+
+  my $tinfo = {};
+  $tinfo->{'name'} = 'report features';
+  $tinfo->{'result_file'} = undef;
+  $tinfo->{'component_id'} = 'mysqld';
+  $tinfo->{'path'} = 'include/report-features.test';
+  $tinfo->{'timezone'}=  "GMT-3";
+  $tinfo->{'slave_num'} = 0;
+  $tinfo->{'master_opt'} = [];
+  $tinfo->{'slave_opt'} = [];
+  $tinfo->{'slave_mi'} = [];
+  $tinfo->{'comment'} = 'report server features';
+  run_mysqltest($tinfo);
+
+  if ( ! $glob_use_embedded_server )
+  {
+    stop_all_servers();
+  }
+}
 
 
 sub run_mysqltest ($) {
@@ -4392,8 +4435,10 @@ sub run_mysqltest ($) {
   mtr_add_arg($args, "--test-file");
   mtr_add_arg($args, $tinfo->{'path'});
 
-  mtr_add_arg($args, "--result-file");
-  mtr_add_arg($args, $tinfo->{'result_file'});
+  if ( defined $tinfo->{'result_file'} ) {
+    mtr_add_arg($args, "--result-file");
+    mtr_add_arg($args, $tinfo->{'result_file'});
+  }
 
   if ( $opt_record )
   {
@@ -4807,3 +4852,4 @@ HERE
   mtr_exit(1);
 
 }
+
diff --git a/mysql-test/mysql-test-run.sh b/mysql-test/mysql-test-run.sh
index 590885b3d46..9e19a8cad7e 100644
--- a/mysql-test/mysql-test-run.sh
+++ b/mysql-test/mysql-test-run.sh
@@ -1750,10 +1750,13 @@ run_testcase ()
        --result-file=*)
          result_file=`$ECHO "$EXTRA_MASTER_OPT" | $SED -e "s;--result-file=;;"`
          result_file="r/$result_file.result"
-         # Note that this must be set to space, not "" for test-reset to
-# work
+         # Note that this must be set to space, not "" for test-reset to work
 	 EXTRA_MASTER_OPT=" "
          ;;
+       --force-restart)
+         # Note that this must be set to space, not "" for test-reset to work
+	 EXTRA_MASTER_OPT=" "
+	 ;;
      esac
      stop_master
      stop_master 1
diff --git a/mysql-test/r/default.result b/mysql-test/r/default.result
index aef49af6c62..e2aa3b4a3cc 100644
--- a/mysql-test/r/default.result
+++ b/mysql-test/r/default.result
@@ -104,3 +104,95 @@ a	b	c	d	e	f	g	h	i	j	k	l	m	n	o	p	q	r	s	t	u	v	w	x	y	z	a1	b1
  	1	0000	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	 	 	NULL	 	 	 	 	NULL	 	 	 	NULL
 drop table t1;
 drop table t2;
+create table bug20691 (i int, d datetime NOT NULL, dn datetime not null default '0000-00-00 00:00:00');
+insert into bug20691 values (1, DEFAULT, DEFAULT), (1, '1975-07-10 07:10:03', '1978-01-13 14:08:51'), (1, DEFAULT, DEFAULT);
+Warnings:
+Warning	1364	Field 'd' doesn't have a default value
+Warning	1364	Field 'd' doesn't have a default value
+insert into bug20691 (i) values (2);
+Warnings:
+Warning	1364	Field 'd' doesn't have a default value
+desc bug20691;
+Field	Type	Null	Key	Default	Extra
+i	int(11)	YES		NULL	
+d	datetime	NO			
+dn	datetime	NO		0000-00-00 00:00:00	
+insert into bug20691 values (3, DEFAULT, DEFAULT), (3, '1975-07-10 07:10:03', '1978-01-13 14:08:51'), (3, DEFAULT, DEFAULT);
+Warnings:
+Warning	1364	Field 'd' doesn't have a default value
+Warning	1364	Field 'd' doesn't have a default value
+insert into bug20691 (i) values (4);
+Warnings:
+Warning	1364	Field 'd' doesn't have a default value
+insert into bug20691 values (5, DEFAULT, DEFAULT), (5, '1975-07-10 07:10:03', '1978-01-13 14:08:51'), (5, DEFAULT, DEFAULT);
+Warnings:
+Warning	1364	Field 'd' doesn't have a default value
+Warning	1364	Field 'd' doesn't have a default value
+SET sql_mode = 'ALLOW_INVALID_DATES';
+insert into bug20691 values (6, DEFAULT, DEFAULT), (6, '1975-07-10 07:10:03', '1978-01-13 14:08:51'), (6, DEFAULT, DEFAULT);
+Warnings:
+Warning	1364	Field 'd' doesn't have a default value
+Warning	1364	Field 'd' doesn't have a default value
+SET sql_mode = 'STRICT_ALL_TABLES';
+insert into bug20691 values (7, DEFAULT, DEFAULT), (7, '1975-07-10 07:10:03', '1978-01-13 14:08:51'), (7, DEFAULT, DEFAULT);
+ERROR HY000: Field 'd' doesn't have a default value
+select * from bug20691 order by i asc;
+i	d	dn
+1	0000-00-00 00:00:00	0000-00-00 00:00:00
+1	1975-07-10 07:10:03	1978-01-13 14:08:51
+1	0000-00-00 00:00:00	0000-00-00 00:00:00
+2	0000-00-00 00:00:00	0000-00-00 00:00:00
+3	0000-00-00 00:00:00	0000-00-00 00:00:00
+3	1975-07-10 07:10:03	1978-01-13 14:08:51
+3	0000-00-00 00:00:00	0000-00-00 00:00:00
+4	0000-00-00 00:00:00	0000-00-00 00:00:00
+5	0000-00-00 00:00:00	0000-00-00 00:00:00
+5	1975-07-10 07:10:03	1978-01-13 14:08:51
+5	0000-00-00 00:00:00	0000-00-00 00:00:00
+6	0000-00-00 00:00:00	0000-00-00 00:00:00
+6	1975-07-10 07:10:03	1978-01-13 14:08:51
+6	0000-00-00 00:00:00	0000-00-00 00:00:00
+drop table bug20691;
+SET sql_mode = '';
+create table bug20691 (
+a set('one', 'two', 'three') not null,
+b enum('small', 'medium', 'large', 'enormous', 'ellisonego') not null,
+c time not null,
+d date not null,
+e int not null,
+f long not null,
+g blob not null,
+h datetime not null,
+i decimal not null,
+x int);
+insert into bug20691 values (2, 3, 5, '0007-01-01', 11, 13, 17, '0019-01-01 00:00:00', 23, 1);
+insert into bug20691 (x) values (2);
+Warnings:
+Warning	1364	Field 'a' doesn't have a default value
+Warning	1364	Field 'c' doesn't have a default value
+Warning	1364	Field 'd' doesn't have a default value
+Warning	1364	Field 'e' doesn't have a default value
+Warning	1364	Field 'f' doesn't have a default value
+Warning	1364	Field 'g' doesn't have a default value
+Warning	1364	Field 'h' doesn't have a default value
+Warning	1364	Field 'i' doesn't have a default value
+insert into bug20691 values (2, 3, 5, '0007-01-01', 11, 13, 17, '0019-01-01 00:00:00', 23, 3);
+insert into bug20691 values (DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, 4);
+Warnings:
+Warning	1364	Field 'a' doesn't have a default value
+Warning	1364	Field 'b' doesn't have a default value
+Warning	1364	Field 'c' doesn't have a default value
+Warning	1364	Field 'd' doesn't have a default value
+Warning	1364	Field 'e' doesn't have a default value
+Warning	1364	Field 'f' doesn't have a default value
+Warning	1364	Field 'g' doesn't have a default value
+Warning	1364	Field 'h' doesn't have a default value
+Warning	1364	Field 'i' doesn't have a default value
+select * from bug20691 order by x asc;
+a	b	c	d	e	f	g	h	i	x
+two	large	00:00:05	0007-01-01	11	13	17	0019-01-01 00:00:00	23	1
+	small	00:00:00	0000-00-00	0			0000-00-00 00:00:00	0	2
+two	large	00:00:05	0007-01-01	11	13	17	0019-01-01 00:00:00	23	3
+	small	00:00:00	0000-00-00	0			0000-00-00 00:00:00	0	4
+drop table bug20691;
+End of 5.0 tests.
diff --git a/mysql-test/t/default.test b/mysql-test/t/default.test
index b5522394d2d..225ddbc3ee2 100644
--- a/mysql-test/t/default.test
+++ b/mysql-test/t/default.test
@@ -82,3 +82,61 @@ SELECT * from t2;
 drop table t1;
 drop table t2;
 
+
+#
+# Bug#20691: DATETIME col (NOT NULL, NO DEFAULT) may insert garbage when specifying DEFAULT
+#
+# From the docs:
+#  If the column can take NULL as a value, the column is defined with an
+#  explicit DEFAULT NULL clause. This is the same as before 5.0.2.
+#
+#  If the column cannot take NULL as the value, MySQL defines the column with
+#  no explicit DEFAULT clause. For data entry, if an INSERT or REPLACE
+#  statement includes no value for the column, MySQL handles the column
+#  according to the SQL mode in effect at the time:
+#
+#    * If strict SQL mode is not enabled, MySQL sets the column to the
+#      implicit default value for the column data type.
+#
+#    * If strict mode is enabled, an error occurs for transactional tables and
+#      the statement is rolled back. For non-transactional tables, an error
+#      occurs, but if this happens for the second or subsequent row of a
+#      multiple-row statement, the preceding rows will have been inserted.
+#
+create table bug20691 (i int, d datetime NOT NULL, dn datetime not null default '0000-00-00 00:00:00');
+insert into bug20691 values (1, DEFAULT, DEFAULT), (1, '1975-07-10 07:10:03', '1978-01-13 14:08:51'), (1, DEFAULT, DEFAULT);
+insert into bug20691 (i) values (2);
+desc bug20691;
+insert into bug20691 values (3, DEFAULT, DEFAULT), (3, '1975-07-10 07:10:03', '1978-01-13 14:08:51'), (3, DEFAULT, DEFAULT);
+insert into bug20691 (i) values (4);
+insert into bug20691 values (5, DEFAULT, DEFAULT), (5, '1975-07-10 07:10:03', '1978-01-13 14:08:51'), (5, DEFAULT, DEFAULT);
+SET sql_mode = 'ALLOW_INVALID_DATES';
+insert into bug20691 values (6, DEFAULT, DEFAULT), (6, '1975-07-10 07:10:03', '1978-01-13 14:08:51'), (6, DEFAULT, DEFAULT);
+SET sql_mode = 'STRICT_ALL_TABLES';
+--error 1364
+insert into bug20691 values (7, DEFAULT, DEFAULT), (7, '1975-07-10 07:10:03', '1978-01-13 14:08:51'), (7, DEFAULT, DEFAULT);
+select * from bug20691 order by i asc;
+drop table bug20691;
+
+SET sql_mode = '';
+create table bug20691 (
+  a set('one', 'two', 'three') not null,
+  b enum('small', 'medium', 'large', 'enormous', 'ellisonego') not null,
+  c time not null,
+  d date not null,
+  e int not null,
+  f long not null,
+  g blob not null,
+  h datetime not null,
+  i decimal not null,
+  x int);
+insert into bug20691 values (2, 3, 5, '0007-01-01', 11, 13, 17, '0019-01-01 00:00:00', 23, 1);
+insert into bug20691 (x) values (2);
+insert into bug20691 values (2, 3, 5, '0007-01-01', 11, 13, 17, '0019-01-01 00:00:00', 23, 3);
+insert into bug20691 values (DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, DEFAULT, 4);
+select * from bug20691 order by x asc;
+drop table bug20691;
+
+###
+--echo End of 5.0 tests.
+
diff --git a/sql/item.cc b/sql/item.cc
index d56ca95093b..d181edb4ecd 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -5379,6 +5379,7 @@ int Item_default_value::save_in_field(Field *field_arg, bool no_conversions)
                             ER(ER_NO_DEFAULT_FOR_FIELD),
                             field_arg->field_name);
       }
+      field_arg->set_default();
       return 1;
     }
     field_arg->set_default();
diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index bb102aa76d8..0126858c262 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -333,7 +333,7 @@ bool opt_error_log= IF_WIN(1,0);
 bool opt_disable_networking=0, opt_skip_show_db=0;
 my_bool opt_character_set_client_handshake= 1;
 bool server_id_supplied = 0;
-bool opt_endinfo,using_udf_functions;
+bool opt_endinfo, using_udf_functions;
 my_bool locked_in_memory;
 bool opt_using_transactions, using_update_log;
 bool volatile abort_loop;
@@ -2108,13 +2108,24 @@ later when used with nscd), disable LDAP in your nsswitch.conf, or use a\n\
 mysqld that is not statically linked.\n");
 #endif
 
- if (test_flags & TEST_CORE_ON_SIGNAL)
- {
-   fprintf(stderr, "Writing a core file\n");
-   fflush(stderr);
-   write_core(sig);
- }
- exit(1);
+  if (locked_in_memory)
+  {
+    fprintf(stderr, "\n\
+The \"--memlock\" argument, which was enabled, uses system calls that are\n\
+unreliable and unstable on some operating systems and operating-system\n\
+versions (notably, some versions of Linux).  This crash could be due to use\n\
+of those buggy OS calls.  You should consider whether you really need the\n\
+\"--memlock\" parameter and/or consult the OS distributer about \"mlockall\"\n\
+bugs.\n");
+  }
+
+  if (test_flags & TEST_CORE_ON_SIGNAL)
+  {
+    fprintf(stderr, "Writing a core file\n");
+    fflush(stderr);
+    write_core(sig);
+  }
+  exit(1);
 }
 
 #ifndef SA_RESETHAND