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Server: nginx/1.26.1
System: Linux iZrj9cbdvwu1cot8sjlyzlZ 5.10.134-15.al8.x86_64 #1 SMP Thu Jul 20 00:44:04 CST 2023 x86_64
User: www (1000)
PHP: 7.4.33
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$ pwd: /www/server/mysql/mysql-test/t/
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File: /www/server/mysql/mysql-test/t/func_str_debug.test
--source include/have_debug_sync.inc

--echo # Bug#20554017 CONCAT MAY INCORRECTLY COPY OVERLAPPING STRINGS

SET @old_debug= @@session.debug;
SET session debug='d,force_fake_uuid';

do concat('111','11111111111111111111111111',
          substring_index(uuid(),0,1.111111e+308));

do concat_ws(',','111','11111111111111111111111111',
             substring_index(uuid(),0,1.111111e+308));

SET session debug= @old_debug;
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