[BUG] free(): double free detected in tcache 2 on restore

[flanger001]

Describe the bug
When I run myloader on a backup directory, it restores all data successfully but then segfaults when restoring constraints. It emits the error in the title. The attached log file will indicate where this is happening.

To Reproduce
Command executed:

myloader \
--host="$address" \
--user="$username" \
--password="$password" \
--database="$database_name" \
--directory="$directory_name" \
--no-data \
--innodb-optimize-keys=AFTER_IMPORT_ALL_TABLES \
--threads="$(nproc)" \
--max-threads-per-table="$(nproc)" \
--verbose=3

Note the --no-data option was so that I could reproduce this successfully and not have it take 6 hours.

Myloader version:
myloader 0.12.3-3, built against MySQL 8.0.28-19

Expected behavior
I expected the restore to complete successfully with no errors.

Log
restore.log

Backup
Not applicable

How to repeat
Running the above command on a backup directory will result in a segfault every time.

Files for reproduction steps are tough because the schema is from a production database. 🙁 I can email you the structure files privately if that would be possible?

Environment (please complete the following information):

• OS version: Debian GNU/Linux 11
• MyDumper version: mydumper 0.12.3-3, built against MySQL 8.0.28-19

Additional context
This is being run from a script in a Kubernetes pod, and the database backup directory is on a mounted block volume. The database being restored to is not on the same machine, but it is in the same Kubernetes cluster.

I believe this error is similar to these:

• [BUG] double free or corruption when using innodb-optimize-keys #703
• [BUG] Segmentation fault (core dumped) #594

Thank you!

[flanger001]

I just tried this again with mydumper 0.12.3-1, built against MySQL 8.0.27-18 and it completed successfully, so I am guessing whatever I am seeing here showed up in 0.12.3-2 or 0.12.3-3.

[flanger001]

And @davidducos if you want the structure files to reproduce this with, let me know and I can get them to you.

[davidducos]

I created a test for master and it didn't fail. Can you test with master? you will need to compile it locally...

[davidducos]

@flanger001 It has been fixed on v0.12.5-1

[flanger001]

@davidducos I can attempt this later today for sure. Thank you!