New GNU ELPA package: inspector - Tool for inspection of Emacs Lisp objects.

    Summary: Tool for inspection of Emacs Lisp objects.
   Requires: emacs-25
    Website: https://github.com/mmontone/emacs-inspector
   Keywords: debugging tool emacs-lisp development 
 Maintainer: Mariano Montone <[email protected]>
     Author: Mariano Montone <[email protected]>

Overview
Inspector tool for Emacs Lisp objects.

Similar to inspectors available for Smalltalk and Common Lisp, but for Emacs Lisp.

Installation
This package is available from ELPA.

M-x package-install RET inspector RET

Usage
Invocation
M-x inspect-expression to evaluate an elisp expression and inspect the result.
M-x inspect-last-sexp to evaluate last sexp in current buffer and inspect the result.
Inside the inspector
M-x inspector-pop bound to letter l, to navigate to previous object.
M-x inspector-quit bound to letter q, to exit the inspector.
Also, M-x forward-button and M-x backward-button are conveniently bound to n and p. They can be used for fast navigation across the buttons that the inspector displays.

Finally, you can use M-x eval-expression bound to letter e, to evaluate an elisp expression using the object currently being inspected (it is bound to *).

From the Emacs debugger
When on an Emacs debugging backtrace, press letter i to inspect the pointed frame and its local variables.