Assertion `((Item_cond *) cond)->functype() == ((Item_cond *) new_item)->functype()' fails on a query with LEFT JOIN and IS NULL conditions

Description

This is the test case that was discussed on IRC. It looks similar to MDEV-4942, but the fix for the latter is already in the tree, and this one still fails.

Environment

None

Assignee

Igor Babaev

Reporter

Elena Stepanova

Labels

None

Fix versions

Priority

Major
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