Bug #98718 explain anaylze select count(*) from mysql.user coredump under debug version

• Submitted: 24 Feb 2020 2:27
• Modified: 3 Apr 2020 12:38
• Reporter: lou shuai (OCA)
• Status: Closed
• Category: MySQL Server: Optimizer
• Severity: S6 (Debug Builds)
• Version: 8.0.18, 8.0.19
• OS: Any
• CPU Architecture: Any

[24 Feb 2020 2:27] lou shuai

Description:
Under DEBUG version of mysqld, 
explain anaylze select count(*) from mysql.user;
will coredump

How to repeat:
explain anaylze select count(*) from mysql.user

[24 Feb 2020 4:59] MySQL Verification Team

Hello!

Thank you for the report and test case.
Observed that 8.0.19 debug build is affected.

Thanks,
Umesh

[24 Feb 2020 5:01] MySQL Verification Team

Test results - 8.0.19

Attachment: 98718.results (application/octet-stream, text), 135.49 KiB.

[3 Apr 2020 12:38] Jon Stephens

Fixed in MySQL 8.0.21.

Affects debug only, no visible changes for users.

Closed.