restart from savepoint fails with "userVisibleTail should not be larger than offset. This is a bug."

I took a savepoint, then used 

SET 'execution.savepoint.path' = ...

to set the savepoint path, and then re-executed the query that had been running before the stop-with-savepoint.

It was not an INSERT INTO job, but rather a "collect" job running a SELECT query.

It then failed with

userVisibleTail should not be larger than offset. This is a bug.

Perhaps there is an unstated requirement that using the sql-client to restart from a savepoint only works with INSERT INTO jobs?