RE: Double-click opens the wrong file

[Drew Adams <drew.adams@oracle.com>]

> Occasionally, when I double click a file to edit it, Emacs will visit a
> different file instead.
> 
> Repeated double clicking visits a succession of incorrect files, until
> Emacs eventually settles on the right one.
> 
> The files are all ones I have been working with recently, although not
> necessarily in Emacs. The visited file need not be in the same location
> or even exist at all – Emacs will quite happily visit a recently deleted
> file.
> 
> Only double clicking files associated with Emacs (26.0.90) seems to be
> affected. Visiting with find-file, drag and drop, and the menu-bar, as
> well as other versions of Emacs, have the expected behaviour.
> 
> I would open a bug, but it feels like an OS problem (I'm on macOS
> 10.12.6), rather than a flaw in Emacs.
> 
> Any ideas what's going on or how to fix/debug this issue?

One place to start is to use `C-h k' and then double-click
wherever you notice the problem.  That should at least tell
you what Emacs command is being invoked by that double-click.