Comment 2 for bug 958033

Hi David,

Thanks for the test case.

Please try to set optimizer_switch=derived_with_keys=off, hopefully it will help with the problem for now; I tried your test case, the failure was reproducible with the default optimizer_switch, but not with derived_with_keys=off.

Although with your variation the problem only reveals on 5.5, I am fairly certain it is the same problem as described in bug https://bugs.launchpad.net/maria/+bug/957409 and which was fixed along with bugfix https://bugs.launchpad.net/maria/+bug/953649:
- it produces the same or very similar valgrind warnings as described in 957409;
- derived_with_keys=off seems to make it go away;
- after the latest merge 5.3->5.5, which includes bugfix https://bugs.launchpad.net/maria/+bug/953649, it is not reproducible any longer.

If you confirm that derived_with_keys=off helped, I will close this bug as a duplicate of https://bugs.launchpad.net/maria/+bug/957409.

Thank you.