[ruby-core:120861] [Ruby master Feature#21105] Improve Ruby Stack Trace to Include Exact Error Position (Column Number)

Issue #21105 has been updated by Eregon (Benoit Daloze).


It is already shown:
```ruby
class Example
  def self.run
    nil.foo.bar.baz
  end
end

Example.run
```

```
example.rb:3:in `run': undefined method `foo' for nil (NoMethodError)

    nil.foo.bar.baz
       ^^^^
	from example.rb:7:in `<main>'
```

Adding columns would add a lot of noise and would not be clearer than that.
So I think we can close this as "already done, just in a different/clearer =
way"

----------------------------------------
Feature #21105: Improve Ruby Stack Trace to Include Exact Error Position (C=
olumn Number)
https://bugs.ruby-lang.org/issues/21105#change-111735

* Author: ennder (J=E9r=F4me BATAILLE)
* Status: Open
----------------------------------------
## Subject

Improve Ruby Stack Trace to Include Exact Error Position (Column Number)

## Description

Currently, when an exception occurs in Ruby, the stack trace provides the f=
ile name and line number but does not indicate the exact position (column n=
umber) where the error occurred within the line. This lack of precision can=
 make debugging more challenging, especially in cases where multiple method=
 calls or expressions are present on the same line.

## Example

``` ruby
class Example
  def self.run
    nil.some_method_call  # Error occurs here
  end
end

Example.run
```

## Expected Behavior

The stack trace should include the column number where the error occurred, =
e.g.:

``` ruby
trace.rb:4:10:in `run': undefined method `some_method_call' for nil:NilClas=
s (NoMethodError)
```


## Benefits

More precise debugging.

Easier identification of errors in complex one-liner expressions.

Better tooling support for editors and debuggers.

## Additional Notes

Would it be possible to add this enhancement in a future Ruby version?

Thank you for considering this request!




--=20
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