diff --git a/mysql-test/suite/binlog/r/binlog_consistent_debug.result b/mysql-test/suite/binlog/r/binlog_consistent_debug.result
new file mode 100644
index 0000000..6dc05bf
--- /dev/null
+++ b/mysql-test/suite/binlog/r/binlog_consistent_debug.result
@@ -0,0 +1,29 @@
+#
+# Bug 92108: Deadlock by concurrent SHOW BINLOGS,
+# performance_schema.global_status query, and binlog purge
+#
+FLUSH LOGS;
+# connection con1
+SET DEBUG_SYNC="purge_logs_after_lock_index_before_thread_count SIGNAL purge_ready WAIT_FOR finish_purge";
+PURGE BINARY LOGS BEFORE '2038-01-19';
+# connection con2
+SET DEBUG_SYNC="materialize_session_variable_array_THD_locked SIGNAL pfs_ready WAIT_FOR finish_pfs";
+SELECT * FROM performance_schema.session_variables WHERE VARIABLE_NAME LIKE 'binlog_transaction_dependency_tracking';;
+# connection con3
+SET DEBUG_SYNC="show_binlogs_after_lock_log_before_lock_index SIGNAL show_ready WAIT_FOR finish_show";
+SHOW BINARY LOGS;
+# connection default
+SET DEBUG_SYNC="now WAIT_FOR purge_ready";
+SET DEBUG_SYNC="now WAIT_FOR pfs_ready";
+SET DEBUG_SYNC="now WAIT_FOR show_ready";
+SET DEBUG_SYNC="now SIGNAL finish_purge";
+SET DEBUG_SYNC="now SIGNAL finish_pfs";
+SET DEBUG_SYNC="now SIGNAL finish_show";
+# connection con1
+Warnings:
+Warning	1868	file ./master-bin.000002 was not purged because it is the active log file.
+# connection con2
+VARIABLE_NAME	VARIABLE_VALUE
+binlog_transaction_dependency_tracking	COMMIT_ORDER
+# connection con3
+# connection default
diff --git a/mysql-test/suite/binlog/t/binlog_consistent_debug.test b/mysql-test/suite/binlog/t/binlog_consistent_debug.test
new file mode 100644
index 0000000..2ad400d
--- /dev/null
+++ b/mysql-test/suite/binlog/t/binlog_consistent_debug.test
@@ -0,0 +1,64 @@
+--source include/have_debug_sync.inc
+--source include/have_log_bin.inc
+--source include/have_perfschema.inc
+
+--echo #
+--echo # Bug 92108: Deadlock by concurrent SHOW BINLOGS,
+--echo # performance_schema.session_variables query, and binlog purge
+--echo #
+
+FLUSH LOGS;
+
+--connect(con1,localhost,root,,)
+--echo # connection con1
+
+SET DEBUG_SYNC="purge_logs_after_lock_index_before_thread_count SIGNAL purge_ready WAIT_FOR finish_purge";
+
+--send PURGE BINARY LOGS BEFORE '2038-01-19'
+
+--connect(con2,localhost,root,,)
+--echo # connection con2
+
+SET DEBUG_SYNC="materialize_session_variable_array_THD_locked SIGNAL pfs_ready WAIT_FOR finish_pfs";
+
+--send SELECT * FROM performance_schema.session_variables WHERE VARIABLE_NAME LIKE 'binlog_transaction_dependency_tracking';
+
+--connect(con3,localhost,root,,)
+--echo # connection con3
+
+SET DEBUG_SYNC="show_binlogs_after_lock_log_before_lock_index SIGNAL show_ready WAIT_FOR finish_show";
+
+--send SHOW BINARY LOGS
+
+--connection default
+--echo # connection default
+
+SET DEBUG_SYNC="now WAIT_FOR purge_ready";
+SET DEBUG_SYNC="now WAIT_FOR pfs_ready";
+SET DEBUG_SYNC="now WAIT_FOR show_ready";
+
+SET DEBUG_SYNC="now SIGNAL finish_purge";
+SET DEBUG_SYNC="now SIGNAL finish_pfs";
+SET DEBUG_SYNC="now SIGNAL finish_show";
+
+--connection con1
+--echo # connection con1
+reap;
+--disconnect con1
+
+--connection con2
+--echo # connection con2
+reap;
+--disconnect con2
+
+--connection con3
+--echo # connection con3
+--disable_result_log
+reap;
+--enable_result_log
+--disconnect con3
+
+--connection default
+--echo # connection default
+
+--source include/wait_until_count_sessions.inc
diff --git a/storage/perfschema/pfs_variable.cc b/storage/perfschema/pfs_variable.cc
index 397377b..7fdf0e3 100644
--- a/storage/perfschema/pfs_variable.cc
+++ b/storage/perfschema/pfs_variable.cc
@@ -195,6 +195,7 @@ int PFS_system_variable_cache::do_materialize_all(THD *unsafe_thd)
   /* Get and lock a validated THD from the thread manager. */
   if ((m_safe_thd= get_THD(unsafe_thd)) != NULL)
   {
+    DEBUG_SYNC(m_current_thd, "materialize_session_variable_array_THD_locked");
     for (Show_var_array::iterator show_var= m_show_var_array.begin();
          show_var->value && (show_var != m_show_var_array.end()); show_var++)
     {