[ruby-core:122551] [Ruby Misc#20968] `Array#fetch_values` unexpected method name in stack trace

Issue #20968 has been updated by mame (Yusuke Endoh).


I have updated the behavior to (mostly) suppress the display of `<internal:...>` frames in a backtrace. The algorithm works as follows:

* When internal frames appear in a sequence, it retains only one frame -- the one directly called from Ruby code.
* The location information of the internal frame is now backpatched with the filename and line number of the caller (similar to how we handle C frames).

If you encounter any cases where this algorithm does not work well, please let me know.

Please note that this transformation is not applied when using the debug inspector API or `TracePoint#path`, so `<internal:...>` will still appear in those cases. This behavior may change in the future. See also #21395.

----------------------------------------
Misc #20968: `Array#fetch_values` unexpected method name in stack trace
https://bugs.ruby-lang.org/issues/20968#change-113784

* Author: koic (Koichi ITO)
* Status: Closed
----------------------------------------

It seems that the current Ruby implementation is displaying unexpected method name in stack trace.

## Expected

Similar to `Hash#fetch_values`, the method name `Array#fetch_values` is expected to be displayed in the stack trace.

```console
$ ruby -e '{k: 42}.fetch_values(:unknown)'
-e:1:in 'Hash#fetch_values': key not found: :unknown (KeyError)
        from -e:1:in '<main>'

$ ruby -e '[1].fetch_values(42)'
-e:1:in 'Array#fetch_values': index 42 outside of array bounds: -1...1 (IndexError)
        from -e:1:in '<main>'
```


## Actual

The stack trace displays the `Array#fetch` method, which user is not aware of, along with the `<internal.array>` stack trace.

```console
$ ruby -e '[1].fetch_values(42)'
<internal:array>:211:in 'Array#fetch': index 42 outside of array bounds: -1...1 (IndexError)
        from <internal:array>:211:in 'block in Array#fetch_values'
        from <internal:array>:211:in 'Array#map!'
        from <internal:array>:211:in 'Array#fetch_values'
        from -e:1:in '<main>'
```


It likely requires an approach such as implementing it in C, as suggested in https://github.com/ruby/ruby/pull/11555.



-- 
https://bugs.ruby-lang.org/
______________________________________________
 ruby-core mailing list -- [e-mail]
 To unsubscribe send an email to [e-mail]
 ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/