branch/serial

sql/test/BugTracker-2019/cte-union.Bug-6755 from 70130:d2a25d02ca50, searching backwards on branch Nov2019

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70130:d2a25d02ca50F_MISSING F_ABRT19 commits
70109:ce4a28db1cddF_MISSING F_ABRT3 commits
70102:44fe79e1edf2F_MISSING F_ABRT3 commits
70085:21e85f0d6944test not run!1 commits