Bug Report
Thanks to @SchrodingerZhu. He ran across this bug and helped me figure out how it happened.
1. Minimal reproduce step (Required)
./dbms/gtests_dbms --gtest_filter="*Date*:*Join*"
2. What did you expect to see? (Required)
All test passed.
3. What did you see instead (Required)

4. What is your TiFlash version? (Required)
Nightly