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Summary of changes
This is to fix the issue #1369, a test case issue.
This test fails randomly because in optimal message selection, there is a shuffling at L373. Further at line L412, there is a trim message chain operation. When performing
trim_msgs_at
and deriving the prev, when idx == 0, prev should equal to None, but instead returned from the function. By chance that the caller passes idx == 0 to the function, then the chain is not trimed and should havevalid
being false but instead true.Reference issue to close (if applicable)
Closes #1369
Other information and links