Ruby 3.4 and weird stacktraces

[23tux]

I updated to Ruby 3.4.7 and noticed some weird behaviour in my Rails 7.1 app regarding error stack traces.

This template produces an error page in development as you would expect:

- if true
  - "foo"
- current_user.foo

The stacktrace in the browser output looks strange:

            @virtual_path = "spree/layouts/application";;@output_buffer = output_buffer || ActionView::OutputBuffer.new; if true; 
; "foo"; 
; end; current_user.foo; 
; @output_buffer
          end

However, when I change the template do this:

- if true
  - "foo"
  - 123
- current_user.foo

I just get the rendered 500.html page in my browser (which is pretty annoying during development), but the stacktrace in my stdout on my dev server looks better than the one I got in my browser:

ActionView::Template::Error (undefined method 'foo' for an instance of Spree::User):
    1: - if true
    2:   - "foo"
    3:   - 123
    4: - current_user.foo

app/views/layouts/application.html.slim:4:in '_app_views_spree_layouts_application_html_slim__1872156654256792566_3029336'

So this is very annoying while developing. Any idea how I could debug this more, or how this could be solved?