Subject: Re: bug#22817: 25.0.91; [PATCH] Include versioned preloaded libraries in `package--builtin-versions'

From: Chris Feng <[email-masked]>
Date: Sat, 27 Feb 2016 09:24:32 +0800

> Currently `package--builtin-versions' does not contain versioned preloaded
> libraries (cl-generic, tabulated-list), which makes package.el believe they're
> not builtin and install the versions from ELPA.  This patch fixes the problem.

I forgot to mention that the bug can be reproduced by installing a
package having a preloaded lib as a dependency, e.g.:

  M-x package-install RET xelb RET

Then cl-generic 0.2 will get installed.