merge

.bzrignore

@@ -8,6 +8,7 @@
 *.core
 *.d
 *.da
+*.dir
 *.exe
 *.gcda
 *.gcno
@@ -25,6 +26,7 @@
 *.pdb
 *.reject
 *.res
+*.rule
 *.sbr
 *.so
 *.so.*
@@ -32,13 +34,19 @@
 *.user
 *.vcproj
 *.vcproj.cmake
+*.vcxproj
+*.vcxproj.filters
 */*.dir/*
+Debug
+MySql.sdf
+Win32
 */*_pure_*warnings
 */.deps
 */.libs/*
 */.pure
 */debug/*
 */release/*
+RelWithDebInfo
 *~
 .*.swp
 ./CMakeCache.txt
@@ -83,6 +91,7 @@ BitKeeper/tmp/*
 BitKeeper/tmp/bkr3sAHD
 BitKeeper/tmp/gone
 CMakeFiles/*
+CMakeFiles
 COPYING
 COPYING.LIB
 Docs/#manual.texi#

myisam/mi_preload.c

@@ -54,6 +54,9 @@ int mi_preload(MI_INFO *info, ulonglong key_map, my_bool ignore_leaves)
   if (!keys || !mi_is_any_key_active(key_map) || key_file_length == pos)
     DBUG_RETURN(0);
 
+  /* Preload into a non initialized key cache should never happen. */
+  DBUG_ASSERT(share->key_cache->key_cache_inited);
+
   block_length= keyinfo[0].block_length;
 
   if (ignore_leaves)

mysql-test/r/key_cache.result

@@ -368,3 +368,19 @@ Variable_name	Value
 key_cache_block_size	1536
 SET GLOBAL key_cache_block_size= @bug28478_key_cache_block_size;
 DROP TABLE t1;
+#
+# Bug#12361113: crash when load index into cache
+#
+# Note that this creates an empty disabled key cache!
+SET GLOBAL key_cache_none.key_cache_block_size = 1024;
+CREATE TABLE t1 (a INT, b INTEGER NOT NULL, KEY (b) ) ENGINE = MYISAM;
+INSERT INTO t1 VALUES (1, 1);
+CACHE INDEX t1 in key_cache_none;
+ERROR HY000: Unknown key cache 'key_cache_none'
+# The bug crashed the server at LOAD INDEX below. Now it will succeed 
+# since the default cache is used due to CACHE INDEX failed for
+# key_cache_none.
+LOAD INDEX INTO CACHE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	preload_keys	status	OK
+DROP TABLE t1;

mysql-test/t/key_cache.test

@@ -247,3 +247,19 @@ SET GLOBAL key_cache_block_size= @bug28478_key_cache_block_size;
 DROP TABLE t1;
 
 # End of 4.1 tests
+
+--echo #
+--echo # Bug#12361113: crash when load index into cache
+--echo #
+
+--echo # Note that this creates an empty disabled key cache!
+SET GLOBAL key_cache_none.key_cache_block_size = 1024;
+CREATE TABLE t1 (a INT, b INTEGER NOT NULL, KEY (b) ) ENGINE = MYISAM;
+INSERT INTO t1 VALUES (1, 1);
+--error ER_UNKNOWN_KEY_CACHE
+CACHE INDEX t1 in key_cache_none;
+--echo # The bug crashed the server at LOAD INDEX below. Now it will succeed 
+--echo # since the default cache is used due to CACHE INDEX failed for
+--echo # key_cache_none.
+LOAD INDEX INTO CACHE t1;
+DROP TABLE t1;

sql/sql_table.cc

@@ -2680,6 +2680,11 @@ bool mysql_assign_to_keycache(THD* thd, TABLE_LIST* tables,
     DBUG_RETURN(TRUE);
   }
   pthread_mutex_unlock(&LOCK_global_system_variables);
+  if (!key_cache->key_cache_inited)
+  {
+    my_error(ER_UNKNOWN_KEY_CACHE, MYF(0), key_cache_name->str);
+    DBUG_RETURN(TRUE);
+  }
   check_opt.key_cache= key_cache;
   DBUG_RETURN(mysql_admin_table(thd, tables, &check_opt,
 				"assign_to_keycache", TL_READ_NO_INSERT, 0, 0,