Issue #14889 has been reported by ioquatix (Samuel Williams).

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Bug #14889: TracePoint for :line never seems to trigger on argument list. Maybe by design?
https://bugs.ruby-lang.org/issues/14889

* Author: ioquatix (Samuel Williams)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
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I have the following code.

```
  30  1|		def print_summary(
  31  0|			output = $stdout
  32   |		)
```

In the margin is the line number followed by the number of hits according to `:line` trace point.

I feel like line 31 should also trigger a line trace point. It's an argument, but it must be executed.

Maybe a different trace point? `:argument`?



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