Index: mysql-5.7.5-m15/sql/binlog.cc
===================================================================
--- mysql-5.7.5-m15.orig/sql/binlog.cc
+++ mysql-5.7.5-m15/sql/binlog.cc
@@ -2557,13 +2557,13 @@ MYSQL_BIN_LOG::MYSQL_BIN_LOG(uint *sync_
 #endif
    bytes_written(0), file_id(1), open_count(1),
    sync_period_ptr(sync_period), sync_counter(0),
-   m_prep_xids(0),
    is_relay_log(0), signal_cnt(0),
    checksum_alg_reset(BINLOG_CHECKSUM_ALG_UNDEF),
    relay_log_checksum_alg(BINLOG_CHECKSUM_ALG_UNDEF),
    previous_gtid_set_relaylog(0)
 {
   my_atomic_store32(&log_state, LOG_CLOSED);
+  my_atomic_store32(&m_prep_xids, 0);
   /*
     We don't want to initialize locks here as such initialization depends on
     safe_mutex (when using safe_mutex) which depends on MY_INIT(), which is
Index: mysql-5.7.5-m15/sql/binlog.h
===================================================================
--- mysql-5.7.5-m15.orig/sql/binlog.h
+++ mysql-5.7.5-m15/sql/binlog.h
@@ -406,7 +406,7 @@ class MYSQL_BIN_LOG: public TC_LOG
   uint sync_counter;
 
   mysql_cond_t m_prep_xids_cond;
-  volatile int32 m_prep_xids;
+  int32 m_prep_xids;
 
   /**
     Increment the prepared XID counter.