bug#42841: 28.0.50; [ruby-mode] ruby-{beginning,end}-of-block doesn't work as is exepected if arguments of method is divided into multi line

[Dmitry Gutov]

Hi!

On 13.08.2020 10:17, Yasuhiro KIMURA wrote:
> ruby-{beginning,end}-of-block doesn't work as is exepected if
> arguments of method is divided into multi line. Following is a sample
> code to reproduce the issue.
>
> ----------------------------------------------------------------------
> 0001: class A
> 0002:   def foo
> 0003:     puts("aaa", "bbb")
> 0004:   end
> 0005: end
> 0006:
> 0007: class B
> 0008:   def foo
> 0009:     puts("aaa",
> 0010:          "bbb")
> 0011:   end
> 0012: end
> ----------------------------------------------------------------------
>
> At first let me assume point is on line 1 column 1. If I type 'C-M-n'
> in this situmation, then point moves to line 5 column 1. And if I type
> 'C-M-p' then point moves back to line 1 column 1. This is just
> expected behavior.
>
> Next let me assume point is on line 7 column 1 and I type 'C-M-n'. The
> expected behavior is that point moves to line 12 column 1. But what
> really happens is that point moves to line 10 column 1 and following
> error message is displayed in minibuffer.

I can't seem to reproduce this. Even after some intensive testing.

> Wrong type argument: number-or-marker-p, nil

Could you perhaps provide a backtrace?

Type M-x toggle-debug-on-error, then trigger the error again.