Hi, Philip.

The error was covered by my error message. After going one level deep, the
real error message is `Package lacks a file header `.
It occurred with the following code, not `package-install-file` (sorry for
the confusion).

``elisp
(with-temp-buffer
  (dired path)
  (ignore-errors (package-dir-info)))  ; error occurred this line
```

The test package I'm trying to install is located at
https://github.com/emacs-eask/cli/tree/master/test/jest/install/foo-mode.

Thanks!

On Thu, May 22, 2025 at 3:45 AM Philip Kaludercic <philipk@posteo.net>
wrote:

> Eli Zaretskii <eliz@gnu.org> writes:
>
> >> From: Jen-Chieh Shen <jcs090218@gmail.com>
> >> Date: Tue, 20 May 2025 17:08:38 -0700
> >>
> >> I recently encountered an error, No package in XXX, when using the
> package-install-file function in
> >> the latest Emacs snapshot. This function was working correctly as of
> May 5, 2025, but started failing
> >> sometime after May 8, 2025. I suspect there may have been a breaking
> change introduced.
> >>
> >> This issue only affects the snapshot build—my CI tests cover Emacs
> versions 26.3, 27.2, 28.2, 29.4, 30.1,
> >> and the snapshot, and all versions except the snapshot pass. You can
> view the test results here:
> >> https://github.com/emacs-eask/cli/actions/runs/14904371642.
> >
> > Philip, could you please take a look at this issue?
>
> Can you elaborate what the tests are doing?  package-install-file works
> fine for me on my end.
>