QA output created by 407
=== This should work ===

myevents
    inst [0 or "fungus"] value [0 event records]
    inst [1 or "bogus"] value [2 event records timestamps TIMESTAMP...TIMESTAMP]

myevents
    inst [0 or "fungus"] value [1 event record timestamp TIMESTAMP]
    inst [1 or "bogus"] value [1 event record timestamp TIMESTAMP]

myevents
    inst [0 or "fungus"] value [2 event records timestamps TIMESTAMP...TIMESTAMP]
    inst [1 or "bogus"] value [1 event record timestamp TIMESTAMP]

myevents
    inst [0 or "fungus"] value [5 event records (7 missed) timestamps TIMESTAMP...TIMESTAMP]
    inst [1 or "bogus"] value [2 event records timestamps TIMESTAMP...TIMESTAMP]

=== These should NOT work ===
Semantic error: derived metric my.bad_1: sample.event.records - sample.event.records: Non-arithmetic type for left operand
Semantic error: derived metric my.bad_2: 1 + sample.event.records: Non-arithmetic type for right operand
Semantic error: derived metric my.bad_3: <expr> + sample.event.records: Non-arithmetic type for right operand
Semantic error: derived metric my.bad_4: sample.event.records - <expr>: Non-arithmetic type for left operand
Semantic error: derived metric my.bad_5: 1 + sample.event.records: Non-arithmetic type for right operand
Semantic error: derived metric my.bad_6: sample.event.records * 2: Non-arithmetic type for left operand
Error: my: Unknown metric name
