Bug#46616: Assertion `!table->auto_increment_field_not_null' on

view manipulations
      
The bespoke flag was not properly reset after last call to 
fill_record. Fixed by resetting in caller mysql_update.

mysql-test/r/auto_increment.result:
  Bug#46616: Test result.
mysql-test/t/auto_increment.test:
  Bug#46616: Test case.
sql/sql_update.cc:
  Bug#46616: Fix.

mysql-test/r/auto_increment.result

@@ -440,3 +440,17 @@ a	val
 2	1
 3	1
 drop table t1;
+#
+# Bug#46616: Assertion `!table->auto_increment_field_not_null' on view   
+# manipulations
+#
+CREATE TABLE t1 ( a INT );
+INSERT INTO t1 VALUES (1), (1);
+CREATE TABLE t2 ( a INT AUTO_INCREMENT KEY );
+CREATE TABLE IF NOT EXISTS t2 AS SELECT a FROM t1;
+ERROR 23000: Duplicate entry '1' for key 1
+UPDATE t2 SET a = 2;
+SELECT a FROM t2;
+a
+2
+DROP TABLE t1, t2;

mysql-test/t/auto_increment.test

@@ -292,3 +292,19 @@ update t1 set a=2 where a=1;
 insert into t1 (val) values (1);
 select * from t1;
 drop table t1;
+--echo #
+--echo # Bug#46616: Assertion `!table->auto_increment_field_not_null' on view   
+--echo # manipulations
+--echo #
+CREATE TABLE t1 ( a INT );
+INSERT INTO t1 VALUES (1), (1);
+
+CREATE TABLE t2 ( a INT AUTO_INCREMENT KEY );
+--error ER_DUP_ENTRY
+CREATE TABLE IF NOT EXISTS t2 AS SELECT a FROM t1;
+
+UPDATE t2 SET a = 2;
+
+SELECT a FROM t2;
+
+DROP TABLE t1, t2;

sql/sql_update.cc

@@ -527,6 +527,7 @@ int mysql_update(THD *thd,
       table->file->unlock_row();
     thd->row_count++;
   }
+  table->auto_increment_field_not_null= FALSE;
   /*
     Caching the killed status to pass as the arg to query event constuctor;
     The cached value can not change whereas the killed status can