diff --git a/mysql-test/main/win_sum.result b/mysql-test/main/win_sum.result
index a17c17845af6e..aa376ecf7bab6 100644
--- a/mysql-test/main/win_sum.result
+++ b/mysql-test/main/win_sum.result
@@ -105,3 +105,12 @@ EXISTS (SELECT 1 ORDER BY 1+sum(2) OVER ())
 #
 # End of 10.4 tests
 #
+#
+# MDEV-32411 Item_sum arguments incorrectly reset to temp table fields which causes crash
+#
+CREATE TABLE t1 (a INT NOT NULL) ;
+INSERT INTO t1 VALUES (EXISTS(SELECT avg(3) OVER (ORDER BY COUNT(DISTINCT a, HEX(a)))));
+DROP TABLE t1;
+#
+# End of 10.5 tests
+#
diff --git a/mysql-test/main/win_sum.test b/mysql-test/main/win_sum.test
index 9800174f54ca0..d392443594948 100644
--- a/mysql-test/main/win_sum.test
+++ b/mysql-test/main/win_sum.test
@@ -57,3 +57,14 @@ SELECT EXISTS (SELECT 1 ORDER BY 1+sum(2) OVER ());
 --echo #
 --echo # End of 10.4 tests
 --echo #
+
+--echo #
+--echo # MDEV-32411 Item_sum arguments incorrectly reset to temp table fields which causes crash
+--echo #
+CREATE TABLE t1 (a INT NOT NULL) ;
+INSERT INTO t1 VALUES (EXISTS(SELECT avg(3) OVER (ORDER BY COUNT(DISTINCT a, HEX(a)))));
+DROP TABLE t1;
+
+--echo #
+--echo # End of 10.5 tests
+--echo #
diff --git a/sql/item_sum.cc b/sql/item_sum.cc
index 78da78adeb1c3..f7b5e97188bdd 100644
--- a/sql/item_sum.cc
+++ b/sql/item_sum.cc
@@ -546,27 +546,6 @@ void Item_sum::fix_num_length_and_dec()
   max_length=float_length(decimals);
 }
 
-Item *Item_sum::get_tmp_table_item(THD *thd)
-{
-  Item_sum* sum_item= (Item_sum *) copy_or_same(thd);
-  if (sum_item && sum_item->result_field)	   // If not a const sum func
-  {
-    Field *result_field_tmp= sum_item->result_field;
-    for (uint i=0 ; i < sum_item->arg_count ; i++)
-    {
-      Item *arg= sum_item->args[i];
-      if (!arg->const_item())
-      {
-	if (arg->type() == Item::FIELD_ITEM)
-	  ((Item_field*) arg)->field= result_field_tmp++;
-	else
-	  sum_item->args[i]= new (thd->mem_root) Item_temptable_field(thd, result_field_tmp++);
-      }
-    }
-  }
-  return sum_item;
-}
-
 
 void Item_sum::update_used_tables ()
 {
diff --git a/sql/item_sum.h b/sql/item_sum.h
index da314471f5c2e..83c7d5cf9e0dd 100644
--- a/sql/item_sum.h
+++ b/sql/item_sum.h
@@ -525,7 +525,6 @@ class Item_sum :public Item_func_or_sum
     aggregator_clear();
   }
   virtual void make_unique() { force_copy_fields= TRUE; }
-  Item *get_tmp_table_item(THD *thd) override;
   virtual Field *create_tmp_field(MEM_ROOT *root, bool group, TABLE *table);
   Field *create_tmp_field_ex(MEM_ROOT *root, TABLE *table, Tmp_field_src *src,
                              const Tmp_field_param *param) override
diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index 76c00c0f932e9..143a6822c758b 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -3232,10 +3232,13 @@ void my_message_sql(uint error, const char *str, myf MyFlags)
                        MyFlags));
 
   DBUG_ASSERT(str != NULL);
+  DBUG_ASSERT(*str != '\0');
   DBUG_ASSERT(error != 0);
   DBUG_ASSERT((MyFlags & ~(ME_BELL | ME_ERROR_LOG | ME_ERROR_LOG_ONLY |
                            ME_NOTE | ME_WARNING | ME_FATAL)) == 0);
 
+  DBUG_ASSERT(str[strlen(str)-1] != '\n');
+
   if (MyFlags & ME_NOTE)
   {
     level= Sql_condition::WARN_LEVEL_NOTE;
diff --git a/sql/sql_error.cc b/sql/sql_error.cc
index decf44c07a628..af8898c7afb7d 100644
--- a/sql/sql_error.cc
+++ b/sql/sql_error.cc
@@ -691,7 +691,6 @@ Sql_condition *Warning_info::push_warning(THD *thd,
                                           const char *msg)
 {
   Sql_condition *cond= NULL;
-  DBUG_ASSERT(msg[strlen(msg)-1] != '\n');
 
   if (! m_read_only)
   {
@@ -749,6 +748,7 @@ void push_warning(THD *thd, Sql_condition::enum_warning_level level,
   if (level == Sql_condition::WARN_LEVEL_ERROR)
     level= Sql_condition::WARN_LEVEL_WARN;
 
+  DBUG_ASSERT(msg[strlen(msg)-1] != '\n');
   (void) thd->raise_condition(code, NULL, level, msg);
 
   /* Make sure we also count warnings pushed after calling set_ok_status(). */
diff --git a/sql/sql_repl.cc b/sql/sql_repl.cc
index d9d310c8078c8..0ed5cb5e99f02 100644
--- a/sql/sql_repl.cc
+++ b/sql/sql_repl.cc
@@ -3087,6 +3087,8 @@ void mysql_binlog_send(THD* thd, char* log_ident, my_off_t pos,
   }
   else if (info->errmsg != NULL)
     safe_strcpy(info->error_text, sizeof(info->error_text), info->errmsg);
+  else if (info->error_text[0] == 0)
+    safe_strcpy(info->error_text, sizeof(info->error_text), ER(info->error));
 
   my_message(info->error, info->error_text, MYF(0));