Merge innodb-5.1-ss6765 to 5.1-bugteam.

8 files changed, 256 insertions, 63 deletions

diff --git a/mysql-test/r/innodb-autoinc.result b/mysql-test/r/innodb-autoinc.result
index c03daa3565e..a36b3a1a865 100644
--- a/mysql-test/r/innodb-autoinc.result
+++ b/mysql-test/r/innodb-autoinc.result
@@ -1161,3 +1161,86 @@ t1	CREATE TABLE `t1` (
   PRIMARY KEY (`c1`)
 ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=latin1
 DROP TABLE t1;
+DROP TABLE IF EXISTS t1;
+Warnings:
+Note	1051	Unknown table 't1'
+CREATE TABLE t1  (c1 INTEGER AUTO_INCREMENT, PRIMARY KEY (c1)) ENGINE=InnoDB;
+INSERT INTO  t1 VALUES (-685113344), (1), (NULL), (NULL);
+SELECT * FROM t1;
+c1
+-685113344
+1
+2
+3
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `c1` int(11) NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`c1`)
+) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1
+DROP TABLE t1;
+CREATE TABLE t1  (c1 INTEGER AUTO_INCREMENT, PRIMARY KEY (c1)) ENGINE=InnoDB;
+INSERT INTO  t1 VALUES (-685113344), (2), (NULL), (NULL);
+SELECT * FROM t1;
+c1
+-685113344
+2
+3
+4
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `c1` int(11) NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`c1`)
+) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=latin1
+DROP TABLE t1;
+CREATE TABLE t1  (c1 INTEGER AUTO_INCREMENT, PRIMARY KEY (c1)) ENGINE=InnoDB;
+INSERT INTO  t1 VALUES (NULL), (2), (-685113344), (NULL);
+INSERT INTO  t1 VALUES (4), (5), (6), (NULL);
+SELECT * FROM t1;
+c1
+-685113344
+1
+2
+3
+4
+5
+6
+7
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `c1` int(11) NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`c1`)
+) ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=latin1
+DROP TABLE t1;
+CREATE TABLE t1  (c1 INTEGER AUTO_INCREMENT, PRIMARY KEY (c1)) ENGINE=InnoDB;
+INSERT INTO  t1 VALUES (NULL), (2), (-685113344), (5);
+SELECT * FROM t1;
+c1
+-685113344
+1
+2
+5
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `c1` int(11) NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`c1`)
+) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1
+DROP TABLE t1;
+CREATE TABLE t1  (c1 INTEGER AUTO_INCREMENT, PRIMARY KEY (c1)) ENGINE=InnoDB;
+INSERT INTO  t1 VALUES (1), (2), (-685113344), (NULL);
+SELECT * FROM t1;
+c1
+-685113344
+1
+2
+3
+SHOW CREATE TABLE t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `c1` int(11) NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`c1`)
+) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=latin1
+DROP TABLE t1;
diff --git a/mysql-test/t/innodb-autoinc.test b/mysql-test/t/innodb-autoinc.test
index bb431408937..ef0359b78b0 100644
--- a/mysql-test/t/innodb-autoinc.test
+++ b/mysql-test/t/innodb-autoinc.test
@@ -631,3 +631,34 @@ REPLACE INTO t1 VALUES (-1);
 SELECT * FROM t1;
 SHOW CREATE TABLE t1;
 DROP TABLE t1;
+
+##
+# 49497: Error 1467 (ER_AUTOINC_READ_FAILED) on inserting a negative value
+#
+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1  (c1 INTEGER AUTO_INCREMENT, PRIMARY KEY (c1)) ENGINE=InnoDB;
+INSERT INTO  t1 VALUES (-685113344), (1), (NULL), (NULL);
+SELECT * FROM t1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+CREATE TABLE t1  (c1 INTEGER AUTO_INCREMENT, PRIMARY KEY (c1)) ENGINE=InnoDB;
+INSERT INTO  t1 VALUES (-685113344), (2), (NULL), (NULL);
+SELECT * FROM t1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+CREATE TABLE t1  (c1 INTEGER AUTO_INCREMENT, PRIMARY KEY (c1)) ENGINE=InnoDB;
+INSERT INTO  t1 VALUES (NULL), (2), (-685113344), (NULL);
+INSERT INTO  t1 VALUES (4), (5), (6), (NULL);
+SELECT * FROM t1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+CREATE TABLE t1  (c1 INTEGER AUTO_INCREMENT, PRIMARY KEY (c1)) ENGINE=InnoDB;
+INSERT INTO  t1 VALUES (NULL), (2), (-685113344), (5);
+SELECT * FROM t1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
+CREATE TABLE t1  (c1 INTEGER AUTO_INCREMENT, PRIMARY KEY (c1)) ENGINE=InnoDB;
+INSERT INTO  t1 VALUES (1), (2), (-685113344), (NULL);
+SELECT * FROM t1;
+SHOW CREATE TABLE t1;
+DROP TABLE t1;
diff --git a/storage/innobase/buf/buf0buf.c b/storage/innobase/buf/buf0buf.c
index 901ce8e0fef..45867388a61 100644
--- a/storage/innobase/buf/buf0buf.c
+++ b/storage/innobase/buf/buf0buf.c
@@ -224,6 +224,9 @@ in the free list to the frames.
 /* Value in microseconds */
 static const int WAIT_FOR_READ	= 20000;
 
+/* Number of attemtps made to read in a page in the buffer pool */
+static const ulint BUF_PAGE_READ_MAX_RETRIES = 100;
+
 buf_pool_t*	buf_pool = NULL; /* The buffer buf_pool of the database */
 
 #ifdef UNIV_DEBUG
@@ -1160,6 +1163,7 @@ buf_page_get_gen(
 	ulint		fix_type;
 	ibool		success;
 	ibool		must_read;
+	ulint		retries = 0;
 
 	ut_ad(mtr);
 	ut_ad((rw_latch == RW_S_LATCH)
@@ -1200,7 +1204,29 @@ loop:
 			return(NULL);
 		}
 
-		buf_read_page(space, offset);
+		if (buf_read_page(space, offset)) {
+			retries = 0;
+		} else if (retries < BUF_PAGE_READ_MAX_RETRIES) {
+			++retries;
+		} else {
+			fprintf(stderr, "InnoDB: Error: Unable"
+				" to read tablespace %lu page no"
+				" %lu into the buffer pool after"
+				" %lu attempts\n"
+				"InnoDB: The most probable cause"
+				" of this error may be that the"
+				" table has been corrupted.\n"
+				"InnoDB: You can try to fix this"
+				" problem by using"
+				" innodb_force_recovery.\n"
+				"InnoDB: Please see reference manual"
+				" for more details.\n"
+				"InnoDB: Aborting...\n",
+				space, offset,
+				BUF_PAGE_READ_MAX_RETRIES);
+
+			ut_error;
+		}
 
 #ifdef UNIV_DEBUG
 		buf_dbg_counter++;
diff --git a/storage/innobase/buf/buf0rea.c b/storage/innobase/buf/buf0rea.c
index fdec0206990..451436ef75b 100644
--- a/storage/innobase/buf/buf0rea.c
+++ b/storage/innobase/buf/buf0rea.c
@@ -299,30 +299,27 @@ buffer buf_pool if it is not already there. Sets the io_fix flag and sets
 an exclusive lock on the buffer frame. The flag is cleared and the x-lock
 released by the i/o-handler thread. Does a random read-ahead if it seems
 sensible. */
-
-ulint
+ibool
 buf_read_page(
 /*==========*/
-			/* out: number of page read requests issued: this can
-			be > 1 if read-ahead occurred */
+			/* out: TRUE if success, FALSE otherwise */
 	ulint	space,	/* in: space id */
 	ulint	offset)	/* in: page number */
 {
 	ib_longlong	tablespace_version;
 	ulint		count;
-	ulint		count2;
 	ulint		err;
 
 	tablespace_version = fil_space_get_version(space);
 
-	count = buf_read_ahead_random(space, offset);
+	buf_read_ahead_random(space, offset);
 
 	/* We do the i/o in the synchronous aio mode to save thread
 	switches: hence TRUE */
 
-	count2 = buf_read_page_low(&err, TRUE, BUF_READ_ANY_PAGE, space,
+	count = buf_read_page_low(&err, TRUE, BUF_READ_ANY_PAGE, space,
 				   tablespace_version, offset);
-	srv_buf_pool_reads+= count2;
+	srv_buf_pool_reads+= count;
 	if (err == DB_TABLESPACE_DELETED) {
 		ut_print_timestamp(stderr);
 		fprintf(stderr,
@@ -336,7 +333,7 @@ buf_read_page(
 	/* Flush pages from the end of the LRU list if necessary */
 	buf_flush_free_margin();
 
-	return(count + count2);
+	return(count > 0);
 }
 
 /************************************************************************
diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc
index 9b6c2cf9895..b037fa0d0fd 100644
--- a/storage/innobase/handler/ha_innodb.cc
+++ b/storage/innobase/handler/ha_innodb.cc
@@ -2652,9 +2652,9 @@ ha_innobase::innobase_initialize_autoinc()
 		auto_inc = innobase_get_int_col_max_value(field);
 	} else {
 		/* We have no idea what's been passed in to us as the
-		autoinc column. We set it to the MAX_INT of our table
-		autoinc type. */
-		auto_inc = 0xFFFFFFFFFFFFFFFFULL;
+		autoinc column. We set it to the 0, effectively disabling
+		updates to the table. */
+		auto_inc = 0;
 
 		ut_print_timestamp(stderr);
 		fprintf(stderr, "  InnoDB: Unable to determine the AUTOINC "
@@ -2663,7 +2663,7 @@ ha_innobase::innobase_initialize_autoinc()
 
 	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {
 		/* If the recovery level is set so high that writes
-		are disabled we force the AUTOINC counter to the MAX
+		are disabled we force the AUTOINC counter to 0
 		value effectively disabling writes to the table.
 		Secondly, we avoid reading the table in case the read
 		results in failure due to a corrupted table/index.
@@ -2672,7 +2672,10 @@ ha_innobase::innobase_initialize_autoinc()
 		tables can be dumped with minimal hassle.  If an error
 		were returned in this case, the first attempt to read
 		the table would fail and subsequent SELECTs would succeed. */
+		auto_inc = 0;
 	} else if (field == NULL) {
+		/* This is a far more serious error, best to avoid
+		opening the table and return failure. */
 		my_error(ER_AUTOINC_READ_FAILED, MYF(0));
 	} else {
 		dict_index_t*	index;
@@ -2701,7 +2704,7 @@ ha_innobase::innobase_initialize_autoinc()
 				"InnoDB: Unable to find the AUTOINC column "
 				"%s in the InnoDB table %s.\n"
 				"InnoDB: We set the next AUTOINC column "
-				"value to the maximum possible value,\n"
+				"value to 0,\n"
 				"InnoDB: in effect disabling the AUTOINC "
 				"next value generation.\n"
 				"InnoDB: You can either set the next "
@@ -2710,7 +2713,13 @@ ha_innobase::innobase_initialize_autoinc()
 				"recreating the table.\n",
 				col_name, index->table->name);
 
-			my_error(ER_AUTOINC_READ_FAILED, MYF(0));
+			/* This will disable the AUTOINC generation. */
+			auto_inc = 0;
+
+			/* We want the open to succeed, so that the user can
+			take corrective action. ie. reads should succeed but
+			updates should fail. */
+			err = DB_SUCCESS;
 			break;
 		default:
 			/* row_search_max_autoinc() should only return
@@ -3968,11 +3977,17 @@ no_commit:
 		prebuilt->autoinc_error = DB_SUCCESS;
 
 		if ((error = update_auto_increment())) {
-
 			/* We don't want to mask autoinc overflow errors. */
-			if (prebuilt->autoinc_error != DB_SUCCESS) {
-				error = (int) prebuilt->autoinc_error;
 
+			/* Handle the case where the AUTOINC sub-system
+			failed during initialization. */
+			if (prebuilt->autoinc_error == DB_UNSUPPORTED) {
+				error_result = ER_AUTOINC_READ_FAILED;
+				/* Set the error message to report too. */
+				my_error(ER_AUTOINC_READ_FAILED, MYF(0));
+				goto func_exit;
+			} else if (prebuilt->autoinc_error != DB_SUCCESS) {
+				error = (int) prebuilt->autoinc_error;
 				goto report_error;
 			}
 
@@ -7883,7 +7898,10 @@ ha_innobase::innobase_get_autoinc(
 		*value = dict_table_autoinc_read(prebuilt->table);
 
 		/* It should have been initialized during open. */
-		ut_a(*value != 0);
+		if (*value == 0) {
+			prebuilt->autoinc_error = DB_UNSUPPORTED;
+			dict_table_autoinc_unlock(prebuilt->table);
+		}
 	}
   
 	return(ulong(prebuilt->autoinc_error));
@@ -7963,6 +7981,11 @@ ha_innobase::get_auto_increment(
 	invoking this method. So we are not sure if it's guaranteed to
 	be 0 or not. */
 
+	/* We need the upper limit of the col type to check for
+	whether we update the table autoinc counter or not. */
+	ulonglong	col_max_value = innobase_get_int_col_max_value(
+		table->next_number_field);
+
 	/* Called for the first time ? */
 	if (trx->n_autoinc_rows == 0) {
 
@@ -7979,6 +8002,11 @@ ha_innobase::get_auto_increment(
 	/* Not in the middle of a mult-row INSERT. */
 	} else if (prebuilt->autoinc_last_value == 0) {
 		set_if_bigger(*first_value, autoinc);
+	/* Check for -ve values. */
+	} else if (*first_value > col_max_value && trx->n_autoinc_rows > 0) {
+		/* Set to next logical value. */
+		ut_a(autoinc > trx->n_autoinc_rows);
+		*first_value = (autoinc - trx->n_autoinc_rows) - 1;
 	}
 
 	*nb_reserved_values = trx->n_autoinc_rows;
@@ -7989,12 +8017,6 @@ ha_innobase::get_auto_increment(
 		ulonglong	need;
 		ulonglong	current;
 		ulonglong	next_value;
-		ulonglong	col_max_value;
-
-		/* We need the upper limit of the col type to check for
-		whether we update the table autoinc counter or not. */
-		col_max_value = innobase_get_int_col_max_value(
-			table->next_number_field);
 
 		current = *first_value > col_max_value ? autoinc : *first_value;
 		need = *nb_reserved_values * increment;
diff --git a/storage/innobase/include/buf0rea.h b/storage/innobase/include/buf0rea.h
index e4620172860..015f30fe6c2 100644
--- a/storage/innobase/include/buf0rea.h
+++ b/storage/innobase/include/buf0rea.h
@@ -18,12 +18,10 @@ buffer buf_pool if it is not already there. Sets the io_fix flag and sets
 an exclusive lock on the buffer frame. The flag is cleared and the x-lock
 released by the i/o-handler thread. Does a random read-ahead if it seems
 sensible. */
-
-ulint
+ibool
 buf_read_page(
 /*==========*/
-			/* out: number of page read requests issued: this can
-			be > 1 if read-ahead occurred */
+			/* out: TRUE if success, FALSE otherwise */
 	ulint	space,	/* in: space id */
 	ulint	offset);/* in: page number */
 /************************************************************************
diff --git a/storage/innobase/lock/lock0lock.c b/storage/innobase/lock/lock0lock.c
index 4cc10931060..8f4b64cda96 100644
--- a/storage/innobase/lock/lock0lock.c
+++ b/storage/innobase/lock/lock0lock.c
@@ -306,6 +306,7 @@ FILE*	lock_latest_err_file;
 /* Flags for recursive deadlock search */
 #define LOCK_VICTIM_IS_START	1
 #define LOCK_VICTIM_IS_OTHER	2
+#define LOCK_EXCEED_MAX_DEPTH	3
 
 /************************************************************************
 Checks if a lock request results in a deadlock. */
@@ -332,16 +333,18 @@ lock_deadlock_recursive(
 				was found and we chose some other trx as a
 				victim: we must do the search again in this
 				last case because there may be another
-				deadlock! */
+				deadlock!
+				LOCK_EXCEED_MAX_DEPTH if the lock search
+				exceeds max steps and/or max depth. */
 	trx_t*	start,		/* in: recursion starting point */
 	trx_t*	trx,		/* in: a transaction waiting for a lock */
 	lock_t*	wait_lock,	/* in: the lock trx is waiting to be granted */
 	ulint*	cost,		/* in/out: number of calculation steps thus
 				far: if this exceeds LOCK_MAX_N_STEPS_...
-				we return LOCK_VICTIM_IS_START */
+				we return LOCK_EXCEED_MAX_DEPTH */
 	ulint	depth);		/* in: recursion depth: if this exceeds
 				LOCK_MAX_DEPTH_IN_DEADLOCK_CHECK, we
-				return LOCK_VICTIM_IS_START */
+				return LOCK_EXCEED_MAX_DEPTH */
 
 /*************************************************************************
 Gets the nth bit of a record lock. */
@@ -3084,8 +3087,6 @@ lock_deadlock_occurs(
 	lock_t*	lock,	/* in: lock the transaction is requesting */
 	trx_t*	trx)	/* in: transaction */
 {
-	dict_table_t*	table;
-	dict_index_t*	index;
 	trx_t*		mark_trx;
 	ulint		ret;
 	ulint		cost	= 0;
@@ -3107,31 +3108,50 @@ retry:
 
 	ret = lock_deadlock_recursive(trx, trx, lock, &cost, 0);
 
-	if (ret == LOCK_VICTIM_IS_OTHER) {
+	switch (ret) {
+	case LOCK_VICTIM_IS_OTHER:
 		/* We chose some other trx as a victim: retry if there still
 		is a deadlock */
-
 		goto retry;
-	}
 
-	if (ret == LOCK_VICTIM_IS_START) {
-		if (lock_get_type(lock) & LOCK_TABLE) {
-			table = lock->un_member.tab_lock.table;
-			index = NULL;
+	case LOCK_EXCEED_MAX_DEPTH:
+		/* If the lock search exceeds the max step
+		or the max depth, the current trx will be
+		the victim. Print its information. */
+		rewind(lock_latest_err_file);
+		ut_print_timestamp(lock_latest_err_file);
+
+		fputs("TOO DEEP OR LONG SEARCH IN THE LOCK TABLE"
+		      " WAITS-FOR GRAPH, WE WILL ROLL BACK"
+		      " FOLLOWING TRANSACTION \n",
+		      lock_latest_err_file);
+
+		fputs("\n*** TRANSACTION:\n", lock_latest_err_file);
+		      trx_print(lock_latest_err_file, trx, 3000);
+
+		fputs("*** WAITING FOR THIS LOCK TO BE GRANTED:\n",
+		      lock_latest_err_file);
+
+		if (lock_get_type(lock) == LOCK_REC) {
+			lock_rec_print(lock_latest_err_file, lock);
 		} else {
-			index = lock->index;
-			table = index->table;
+			lock_table_print(lock_latest_err_file, lock);
 		}
+		break;
 
-		lock_deadlock_found = TRUE;
-
+	case LOCK_VICTIM_IS_START:
 		fputs("*** WE ROLL BACK TRANSACTION (2)\n",
 		      lock_latest_err_file);
+		break;
 
-		return(TRUE);
+	default:
+		/* No deadlock detected*/
+		return(FALSE);
 	}
 
-	return(FALSE);
+	lock_deadlock_found = TRUE;
+
+	return(TRUE);
 }
 
 /************************************************************************
@@ -3147,16 +3167,18 @@ lock_deadlock_recursive(
 				was found and we chose some other trx as a
 				victim: we must do the search again in this
 				last case because there may be another
-				deadlock! */
+				deadlock!
+				LOCK_EXCEED_MAX_DEPTH if the lock search
+				exceeds max steps and/or max depth. */
 	trx_t*	start,		/* in: recursion starting point */
 	trx_t*	trx,		/* in: a transaction waiting for a lock */
 	lock_t*	wait_lock,	/* in: the lock trx is waiting to be granted */
 	ulint*	cost,		/* in/out: number of calculation steps thus
 				far: if this exceeds LOCK_MAX_N_STEPS_...
-				we return LOCK_VICTIM_IS_START */
+				we return LOCK_EXCEED_MAX_DEPTH */
 	ulint	depth)		/* in: recursion depth: if this exceeds
 				LOCK_MAX_DEPTH_IN_DEADLOCK_CHECK, we
-				return LOCK_VICTIM_IS_START */
+				return LOCK_EXCEED_MAX_DEPTH */
 {
 	lock_t*	lock;
 	ulint	bit_no		= ULINT_UNDEFINED;
@@ -3215,7 +3237,7 @@ lock_deadlock_recursive(
 
 			lock_trx = lock->trx;
 
-			if (lock_trx == start || too_far) {
+			if (lock_trx == start) {
 
 				/* We came back to the recursion starting
 				point: a deadlock detected; or we have
@@ -3262,19 +3284,10 @@ lock_deadlock_recursive(
 				}
 #ifdef UNIV_DEBUG
 				if (lock_print_waits) {
-					fputs("Deadlock detected"
-					      " or too long search\n",
+					fputs("Deadlock detected\n",
 					      stderr);
 				}
 #endif /* UNIV_DEBUG */
-				if (too_far) {
-
-					fputs("TOO DEEP OR LONG SEARCH"
-					      " IN THE LOCK TABLE"
-					      " WAITS-FOR GRAPH\n", ef);
-
-					return(LOCK_VICTIM_IS_START);
-				}
 
 				if (trx_weight_cmp(wait_lock->trx,
 						   start) >= 0) {
@@ -3310,6 +3323,21 @@ lock_deadlock_recursive(
 				return(LOCK_VICTIM_IS_OTHER);
 			}
 
+			if (too_far) {
+
+#ifdef UNIV_DEBUG
+				if (lock_print_waits) {
+					fputs("Deadlock search exceeds"
+					      " max steps or depth.\n",
+					      stderr);
+				}
+#endif /* UNIV_DEBUG */
+				/* The information about transaction/lock
+				to be rolled back is available in the top
+				level. Do not print anything here. */
+				return(LOCK_EXCEED_MAX_DEPTH);
+			}
+
 			if (lock_trx->que_state == TRX_QUE_LOCK_WAIT) {
 
 				/* Another trx ahead has requested lock	in an
diff --git a/storage/innobase/os/os0file.c b/storage/innobase/os/os0file.c
index 085f62daacc..7373a97cfb0 100644
--- a/storage/innobase/os/os0file.c
+++ b/storage/innobase/os/os0file.c
@@ -759,7 +759,15 @@ next_file:
 #ifdef HAVE_READDIR_R
 	ret = readdir_r(dir, (struct dirent*)dirent_buf, &ent);
 
-	if (ret != 0) {
+	if (ret != 0
+#ifdef UNIV_AIX
+	    /* On AIX, only if we got non-NULL 'ent' (result) value and
+	    a non-zero 'ret' (return) value, it indicates a failed
+	    readdir_r() call. An NULL 'ent' with an non-zero 'ret'
+	    would indicate the "end of the directory" is reached. */
+	    && ent != NULL
+#endif
+	   ) {
 		fprintf(stderr,
 			"InnoDB: cannot read directory %s, error %lu\n",
 			dirname, (ulong)ret);