many warnings (practically safe but annoying) corrected

client/mysqladmin.cc:
  don't use the handler after it's closed
client/mysqlbinlog.cc:
  memory leak
client/mysqldump.c:
  many "ignore return value" warnings, one "NULL dereference"
cmd-line-utils/libedit/history.c:
  memory leak
include/my_base.h:
  cleanup
libmysql/libmysql.c:
  "return value ignored" warning
myisam/mi_delete.c:
  "return value ignored" warning
myisam/myisampack.c:
  "out-of-bound access" warning
myisam/sort.c:
  "double free" warning
mysys/default_modify.c:
  "double free" warning
mysys/mf_iocache2.c:
  "return value ignored" warnings
mysys/my_bitmap.c:
  s/return/DBUG_RETURN/
mysys/my_error.c:
  memory leak
server-tools/instance-manager/parse.cc:
  "NULL dereference" warning
sql-common/client.c:
  "NULL dereference" warning
sql/field.cc:
  deadcode, "NULL dereference", "uninitialized" warnings
sql/field.h:
  unused parameters removed from constructor
sql/ha_myisam.cc:
  "return value ignored" warnings
sql/item.cc:
  "return value ignored" warnings
  changed constructor
sql/item_func.cc:
  "return value ignored" warnings
sql/log_event.cc:
  uninitialized warning
sql/opt_range.cc:
  "double free" and uninitialized warnings
sql/opt_range.h:
  "return value ignored" warning
sql/repl_failsafe.cc:
  "return value ignored" warning
sql/set_var.cc:
  "return value ignored" warning
sql/slave.cc:
  "return value ignored" warnings
sql/slave.h:
  new prototype
sql/sql_acl.cc:
  deadcode and "NULL dereference" warnings
sql/sql_db.cc:
  "return value ignored" warning
sql/sql_handler.cc:
  "NULL dereference" warning
sql/sql_help.cc:
  "NULL dereference" warning
sql/sql_insert.cc:
  "return value ignored" warning
sql/sql_parse.cc:
  "return value ignored" warning
  one more DBUG_ASSERT
sql/sql_repl.cc:
  "return value ignored" and memory leak warnings
sql/sql_show.cc:
  "return value ignored" and "NULL dereference"  warnings
sql/sql_test.cc:
  "return value ignored" warning
sql/table.cc:
  memory leak
sql/uniques.cc:
  "return value ignored" warning
  endspaces deleted

1 files changed, 9 insertions, 3 deletions

diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc
index dc5237d9b7d..7e53d435400 100644
--- a/sql/sql_parse.cc
+++ b/sql/sql_parse.cc
@@ -1593,6 +1593,11 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
     statistic_increment(thd->status_var.com_other, &LOCK_status);
     thd->enable_slow_log= opt_log_slow_admin_statements;
     db= thd->alloc(db_len + tbl_len + 2);
+    if (!db)
+    {
+      my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
+      break;
+    }
     tbl_name= strmake(db, packet + 1, db_len)+1;
     strmake(tbl_name, packet + db_len + 2, tbl_len);
     mysql_table_dump(thd, db, tbl_name, -1);
@@ -1606,14 +1611,14 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
     statistic_increment(thd->status_var.com_other, &LOCK_status);
     char *user= (char*) packet;
     char *passwd= strend(user)+1;
-    /* 
+    /*
       Old clients send null-terminated string ('\0' for empty string) for
       password.  New clients send the size (1 byte) + string (not null
       terminated, so also '\0' for empty string).
     */
-    char db_buff[NAME_LEN+1];                 // buffer to store db in utf8 
+    char db_buff[NAME_LEN+1];                 // buffer to store db in utf8
     char *db= passwd;
-    uint passwd_len= thd->client_capabilities & CLIENT_SECURE_CONNECTION ? 
+    uint passwd_len= thd->client_capabilities & CLIENT_SECURE_CONNECTION ?
       *passwd++ : strlen(passwd);
     db+= passwd_len + 1;
 #ifndef EMBEDDED_LIBRARY
@@ -6865,6 +6870,7 @@ bool reload_acl_and_cache(THD *thd, ulong options, TABLE_LIST *tables,
 #ifdef HAVE_REPLICATION
   if (options & REFRESH_MASTER)
   {
+    DBUG_ASSERT(thd);
     tmp_write_to_binlog= 0;
     if (reset_master(thd))
     {