Info-read-node-name is useful even when the current buffer is not an

Info buffer because it can be used to specify a file from which to read

Info node name completions, e.g. if you want to produce a link within an

Emacs Lisp file to a specific Info node.

Unfortunately, when this function is called outside of an Info buffer,

it produces an error when it calls `Info-build-node-completions' and

that calls `Info-build-node-completions-1' which fails to produce any

completions.  By wrapping that last call in a condition-case to catch

the error, the problem is solved and Info-read-node-name works properly

in any buffer.  At first, it will report there are no completions, then

when you specify an Info file, it will complete for that file as

desired.  For example, try the unpatched and then the patched code

in an Emacs Lisp buffer, evaluating this expression:

(Info-read-node-name "(File)Node: ")

The patch is included below.

Bob

--------

*** info-orig.el.gz 2016-06-27 15:57:29.000000000 -0400

--- info.el.gz 2016-06-27 15:57:29.000000000 -0400

***************

*** 1882,1888 ****

     (push (cons filename Info-current-file-completions) Info-file-completions)

     Info-current-file-completions))

      (or Info-current-file-completions

! (Info-build-node-completions-1))))

  

  (defun Info-build-node-completions-1 ()

    (let ((compl nil)

--- 1882,1890 ----

     (push (cons filename Info-current-file-completions) Info-file-completions)

     Info-current-file-completions))

      (or Info-current-file-completions

! (condition-case nil

!    (Info-build-node-completions-1)

!  (error nil)))))

  

  (defun Info-build-node-completions-1 ()

    (let ((compl nil)