Merge 10.1 into 10.2

extra/mariabackup/xtrabackup.cc

@@ -6515,3 +6515,12 @@ static int get_exepath(char *buf, size_t size, const char *argv0)
 
   return my_realpath(buf, argv0, 0);
 }
+
+
+#if defined (__SANITIZE_ADDRESS__) && defined (__linux__)
+/* Avoid LeakSanitizer's false positives. */
+const char* __asan_default_options()
+{
+  return "detect_leaks=0";
+}
+#endif

mysql-test/suite/innodb/r/innodb-alter-debug.result

@@ -89,13 +89,12 @@ INSERT INTO t1 SELECT NULL, i FROM t1;
 INSERT INTO t1 SELECT NULL, i FROM t1;
 LOCK TABLE t1 READ;
 connect  con1,localhost,root,,test;
-SET max_statement_time= 1;
 ALTER TABLE t1 FORCE, ALGORITHM=COPY;
-ERROR 70100: Query execution was interrupted (max_statement_time exceeded)
-SET DEBUG_SYNC = 'now SIGNAL stop_waining';
+connection default;
+kill query @id;
+connection con1;
+ERROR 70100: Query execution was interrupted
 disconnect con1;
 connection default;
-SET DEBUG_SYNC = 'now WAIT_FOR stop_waining';
 UNLOCK TABLES;
 DROP TABLE t1;
-SET DEBUG_SYNC = 'RESET';

mysql-test/suite/innodb/t/innodb-alter-debug.test

@@ -98,9 +98,6 @@ SET DEBUG_SYNC='RESET';
 
 DROP TABLE t1;
 
-# Wait till all disconnects are completed
---source include/wait_until_count_sessions.inc
-
 --echo #
 --echo # MDEV-17470 Orphan temporary files after interrupted ALTER
 --echo # cause InnoDB: Operating system error number 17 and eventual
@@ -117,14 +114,21 @@ INSERT INTO t1 SELECT NULL, i FROM t1;
 LOCK TABLE t1 READ;
 
 --connect (con1,localhost,root,,test)
-SET max_statement_time= 1;
---error ER_STATEMENT_TIMEOUT
-ALTER TABLE t1 FORCE, ALGORITHM=COPY;
-SET DEBUG_SYNC = 'now SIGNAL stop_waining';
---disconnect con1
+let $ID= `SELECT @id := CONNECTION_ID()`;
+send ALTER TABLE t1 FORCE, ALGORITHM=COPY;
 
 --connection default
-SET DEBUG_SYNC = 'now WAIT_FOR stop_waining';
+let $wait_condition= select 1 from information_schema.processlist where state='Waiting for table metadata lock';
+source include/wait_condition.inc;
+let $ignore= `SELECT @id := $ID`;
+kill query @id;
+--connection con1
+--error ER_QUERY_INTERRUPTED
+reap;
+--disconnect con1
+--connection default
 UNLOCK TABLES;
 DROP TABLE t1;
-SET DEBUG_SYNC = 'RESET';
+
+# Wait till all disconnects are completed
+--source include/wait_until_count_sessions.inc