$ java -cp target/classes com.ankurm.jfr.events.BrokenEventPatternDemo
calls:               200
exceptions thrown:    41
events committed:     159
expected if lossless: 200
events missing:       41 (== exceptions thrown)

BrokenEventPattern.processWithoutTryFinally() has no try/finally around
event.commit(); when riskyStep() throws (about one call in five, by design),
execution leaves the method from the catch in the demo driver, not from the line
that would have called commit(). The event threshold was forced to 0 ms for this
run specifically to rule out "the event was just too fast to pass the default
threshold" as an alternative explanation -- every one of the 41 missing events is
attributable to the missing try/finally, not to filtering. No exception, log line,
or JFR.check output calls this out: the only way to notice is to count.