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diff --git a/mysql-test/suite/innodb/t/create-index.test b/mysql-test/suite/innodb/t/create-index.test
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+--source include/have_innodb.inc
+
+--echo #
+--echo # Bug #18010711 UNIQUE PREFIX INDEX ON BINARY COLUMN: FAILING
+--echo # ASSERTION: FLEN == LEN
+--echo #
+create table t1 (f1 binary(5)) engine=innodb;
+insert into t1 values ('w'), ('w');
+--error ER_DUP_ENTRY
+create unique index index_t1 on t1(f1(4));
+drop table t1;