reopen 44294
stop

>> -	  (user-error "Rerun etags: `%s' not found in %s"
>> -                      pat buffer-file-name)))
>> +	  (if (or (= (point-min) 1) (not widen-automatically))
>> +              (user-error "Rerun etags: `%s' not found in %s"
>> +                          pat buffer-file-name)
>> +            ;; Rerun after removing narrowing
>> +            (widen)
>> +            (etags-goto-tag-location tag-info))))
>
> By the way... have you tried to use the same method here as in elisp-mode?
> Meaning, widen unconditionally inside 'save-restriction'.
>
> There should be no reason for backends to do it differently. And this way,
> you don't have to always search twice for a missing tag when inside
> a narrowing.

It should not widen unnecessarily when the found position is within the
narrowed region.  In this regard, xref--goto-char does the right thing:

  (defun xref--goto-char (pos)
    (cond
     ((and (<= (point-min) pos) (<= pos (point-max))))
     (widen-automatically (widen))
     (t (user-error "Position is outside accessible part of buffer")))
    (goto-char pos))

It widens only when position is outside accessible part of buffer
(and widen-automatically is non-nil).

Now I fixed goto-line to use the same condition as in xref--goto-char

  (and (<= (point-min) p) (<= p (point-max)))

to widen only when the found position is outside accessible part of buffer: