bug#19657: 25.0.50; Test failures in Emacs master, can't figure out what I'm doing wrong

[Glenn Morris]

Jorgen Schaefer wrote:

> Test package-test-describe-package backtrace:
>   autoload-find-destination("/home/forcer/tmp/pkg-test-user-dir-28222y
>   autoload--setup-output(t nil "/home/forcer/tmp/pkg-test-user-dir-282
>   autoload-generate-file-autoloads("../../../simple-single-1.3/simple-
>   update-directory-autoloads("/home/forcer/tmp/pkg-test-user-dir-28222
>   package-generate-autoloads(simple-single "/home/forcer/tmp/pkg-test-

Interesting!
Looks like you have TMPDIR set to a subdirectory of HOME?
I can reproduce the failures with such a setting:

make package-test                             # works fine
mkdir $HOME/foo
TMPDIR=$HOME/foo make package-test            # fails

So it's a real bug that no-one has found till now.