Eli Zaretskii <eliz@gnu.org> writes:

>> From: Joseph Mingrone <jrm@FreeBSD.org>
>> Date: Tue, 16 Jan 2018 00:20:38 -0400
>> Cc: Ashish SHUKLA <ashish@FreeBSD.org>

>> Building with commit 5af5df1 results in this error when ACL support is
>> turned on.

>> EMACSLOADPATH= '../src/bootstrap-emacs' -batch --no-site-file --no-site-lisp --eval '(setq load-prefer-newer t)'  -f batch-byte-compile emacs-lisp/macroexp.el
>> >>Error occurred processing emacs-lisp/macroexp.el: File error (("Copying permissions to" "Invalid argument"
>> "/wrkdirs/usr/ports/editors/emacs-devel/work-full/emacs-5af5df1f7c20858dab762830e1a94994ceda425/lisp/emacs-lisp/macroexp.elc"))

>> The build succeeded with commit 6b8e9b7 from November 17th.

> Could you try bisecting, please?

> Thanks.

The same error occurs with bf9b972 from December 2, but only when ACL is
on.  By moving back one commit to ac144dc, the build succeeds regardless
of the status of ACL.

With commit bf9b972 the value of tempfile looks something like this.
/tmp/autoload.elca4aVmU

With that commit reverted, the value of tempfile looks something like this.
/wrkdirs/usr/ports/editors/emacs-devel/work-full/emacs-694ee38/lisp/emacs-lisp/autoload.elcFmWzli

Inside the builder jail, the /tmp permissions are drwxrwxrwt.

Using the latest commit, but with the change in bf9b972 reverted, the
build succeeds.

J.