sys.ps_trace_thread can not work

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Hello Takagi,

Thank you for the details.

Will wait for your test case example to reproduce this issue.

Also could you please add mysql version details you are using. It would be good if you can also check the same with upstream mysql community version and if you see the issue then file bug report to https://bugs.mysql.com/  

It was also found that an error occurred when executing SQL with line breaks in STORED PROCEDURE. I will add error cases later.