Merge with 4.1

BitKeeper/etc/ignore:
  auto-union
BitKeeper/etc/logging_ok:
  auto-union
BUILD/SETUP.sh:
  Auto merged
Build-tools/Do-compile:
  Auto merged
client/mysqladmin.cc:
  Auto merged
configure.in:
  Auto merged
innobase/include/lock0lock.h:
  Auto merged
innobase/os/os0file.c:
  Auto merged
libmysqld/Makefile.am:
  Auto merged
mysql-test/mysql-test-run.sh:
  Auto merged
mysql-test/r/ctype_ucs.result:
  Auto merged
mysql-test/r/heap.result:
  Auto merged
mysql-test/r/insert_select.result:
  Auto merged
mysql-test/r/lowercase_table3.result:
  Auto merged
mysql-test/r/rpl_start_stop_slave.result:
  Auto merged
mysql-test/r/subselect.result:
  Auto merged
mysql-test/t/ctype_ucs.test:
  Auto merged
mysql-test/t/rpl_until.test:
  Auto merged
mysql-test/t/subselect.test:
  Auto merged
ndb/src/kernel/blocks/dblqh/DblqhMain.cpp:
  Auto merged
sql/field.cc:
  Auto merged
sql/field.h:
  Auto merged
sql/ha_myisam.h:
  Auto merged
sql/handler.cc:
  Auto merged
sql/handler.h:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/lock.cc:
  Auto merged
sql/log_event.h:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/set_var.cc:
  Auto merged
sql/slave.cc:
  Auto merged
sql/slave.h:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_db.cc:
  Auto merged
sql/sql_delete.cc:
  Auto merged
sql/sql_prepare.cc:
  Auto merged
sql/sql_rename.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_show.cc:
  Auto merged
sql/sql_update.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
sql/log_event.cc:
  Merge with 4.1
  Trivial cleanup

1 files changed, 9 insertions, 0 deletions

diff --git a/sql/sql_show.cc b/sql/sql_show.cc
index eb9ca43b56a..fd12c206e64 100644
--- a/sql/sql_show.cc
+++ b/sql/sql_show.cc
@@ -847,6 +847,15 @@ append_identifier(THD *thd, String *packet, const char *name, uint length)
   {
     uchar chr= (uchar) *name;
     length= my_mbcharlen(system_charset_info, chr);
+    /*
+      my_mbcharlen can retur 0 on a wrong multibyte
+      sequence. It is possible when upgrading from 4.0,
+      and identifier contains some accented characters.
+      The manual says it does not work. So we'll just
+      change length to 1 not to hang in the endless loop.
+    */
+    if (!length)
+      length= 1;
     if (length == 1 && chr == (uchar) quote_char)
       packet->append(&quote_char, 1, system_charset_info);
     packet->append(name, length, packet->charset());