Tablespace is missing for a table while doing IMPORT TABLESPACE

--source include/have_innodb.inc

--let $MYSQLD_DATADIR= SELECT @@datadir

--let $SOURCE_IBD=SELECT CONCAT("$MYSQLD_DATADIR", "test/t1.ibd")

--let $TARGET_IBD=SELECT CONCAT("$MYSQLD_DATADIR", "test/imp_t1.ibd")

SET SESSION sql_mode = 'NO_ENGINE_SUBSTITUTION' ;

SET DEFAULT_STORAGE_ENGINE= 'InnoDB' ;

USE test ;

--disable_abort_on_error

CREATE TABLE t1 (

col_varchar_255_utf8 varchar(255)  CHARACTER SET utf8,

col_text_utf8 text  CHARACTER SET utf8,

col_int int) ENGINE=innodb ;

INSERT /*! IGNORE */ INTO t1 VALUES

 ('devil', 'characteristic', 3) ,

 ('fiction', 'bishop', 7) ,

 ('w', 'moderate', 1835925504) ,

 ('bkzrqlzlsgtlxhhtytdoapcgvseyjcaghquzjbbswhmmyvoeatphtlsrplbjjclcoruqlnpgkviwgqgcidiimlccjuvyepfbmsdxtpacxirfmtfyjsjkegpzfostkjltlgbjvlifrxfyaezxbdzjctezrzdridqvkpdhbonajxtqbnwugdowris', 'increasing', 9) ,

 ('k', 'cause', NULL) ,

 ('ceiling', 'shove', 1445003264) ,

 ('q', 'shout', 619905024) ,

 ('s', 'staff', NULL) ,

 ('ego', 'will', -776011776) ,

 ('index', 'stumble', NULL)  ;

FLUSH TABLES table0_innodb, table1_innodb, t1 FOR EXPORT  ;

UNLOCK TABLES ;

CREATE TABLE IF NOT EXISTS imp_t1 LIKE t1  ;

ALTER TABLE imp_t1 ADD KEY IF NOT EXISTS idx ( col_int ) ;

ALTER TABLE imp_t1 DISCARD TABLESPACE ;

ALTER TABLE imp_t1 IMPORT TABLESPACE ;

--echo 'copy ibd file around'

--copy_file $SOURCE_IBD $TARGET_IBD

ALTER TABLE imp_t1 IMPORT TABLESPACE ;

DROP TABLE imp_t1;

ERROR HY000: Got error 194 "Tablespace is missing for a table" from storage engine InnoDB

'copy ibd file around'

innodb.1 'innodb'                        [ fail ]

        Test ended at 2021-07-26 14:01:36

CURRENT_TEST: innodb.1

mysqltest: At line 32: Path 'SELECT CONCAT("SELECT @@datadir", "test/imp_t1.ibd")' is not a subdirectory of MYSQLTEST_VARDIR '/home/kevgs/work/m/bb-10.2-kevgs/build/mysql-test/var'or MYSQL_TMP_DIR '/home/kevgs/work/m/bb-10.2-kevgs/build/mysql-test/var/tmp'

Warnings from just before the error:

Warning 1810 IO Read error: (2, No such file or directory) Error opening './test/imp_t1.cfg', will attempt to import without schema verification 

Warning 1816 ALTER TABLE '`test`.`imp_t1`' IMPORT TABLESPACE failed with error 44 : 'Tablespace not found'

 - saving '/home/kevgs/work/m/bb-10.2-kevgs/build/mysql-test/var/log/innodb.1-innodb/' to '/home/kevgs/work/m/bb-10.2-kevgs/build/mysql-test/var/log/innodb.1-innodb/'

***Warnings generated in error logs during shutdown after running tests: innodb.1

2021-07-26 14:01:35 140407949309696 [ERROR] InnoDB: Operating system error number 2 in a file operation.

2021-07-26 14:01:35 140407949309696 [ERROR] InnoDB: The error means the system cannot find the path specified.

2021-07-26 14:01:35 140407949309696 [ERROR] InnoDB: Trying to import a tablespace, but could not open the tablespace file ./test/imp_t1.ibd