On Saturday, May 27th, 2023 at 14:33, Eli Zaretskii <eliz@gnu.org> wrote:
> > From: Jimmy Yuen Ho Wong wyuenho@gmail.com
> 
> > Date: Sat, 27 May 2023 18:38:29 +0100
> > 
> > Reproduction:
> > 
> > 0. Open a Emacs GUI, i.e. NS port
> > 1. C-x C-f /some/nonexistent/Dockerfile
> > 2. M-x toggle-debug-on-error
> > 2. M-x imenu-add-menubar-index
> > 3. Click on the Index > Stage menu item
> > 4. Observe the following error pops up
> > 
> > Expectation:
> > 
> > If the dockerfile-ts-mode buffer is empty, there should not be an extra
> > item preset in the imenu index that when clicked on will jump to a
> > non-existent location and result in an error.
> > 
> > `Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil) imenu-default-goto-function("Stage" nil) imenu(("Stage" nil imenu-default-goto-function)) imenu(("Stage")) imenu--menubar-select(("Stage")) #f(compiled-function () (interactive nil) #<bytecode 0xcfe8182542f4cbd>)() funcall-interactively(#f(compiled-function () (interactive nil) #<bytecode 0xcfe8182542f4cbd>)) #<subr call-interactively>(#f(compiled-function () (interactive nil) #<bytecode 0xcfe8182542f4cbd>) nil nil) call-interactively@ido-cr+-record-current-command(#<subr call-interactively> #f(compiled-function () (interactive nil) #<bytecode 0xcfe8182542f4cbd>) nil nil) apply(call-interactively@ido-cr+-record-current-command #<subr call-interactively> (#f(compiled-function () (interactive nil) #<bytecode 0xcfe8182542f4cbd>) nil nil)) call-interactively(#f(compiled-function () (interactive nil) #<bytecode 0xcfe8182542f4cbd>) nil nil) command-execute(#f(compiled-function () (interactive nil) #<bytecode 0xcfe8182542f4cbd>))`
> 
> 
> Thanks.
> 
> Randy, can you p-lease look into this?

Thanks for the report Jimmy.

Patch attached.