I have found a workaround, so I would like to drop this issue. I believe the issue is due to a bug in a corner case lisp-unit2 that does not show up under normal circumstances. For instance, lisp-unit2 compiles in the cl-test-grid (link <https://common-lisp.net/project/cl-test-grid/library/lisp-unit2.html>). I posted an issue <https://github.com/AccelerationNet/lisp-unit2/issues/10> on LispUnit2's GitHub. On 4 Jun 2019, at 10:42, Mirko Vukovic wrote:

Hello,

I am hitting a bug when loading lisp-unit2 as it (still) depends on the depreciated variable *systems-being-operated* (I did submit a ticket <https://github.com/AccelerationNet/lisp-unit2/issues/10>, but it is as yet not addressed). So I am trying to fix it myself.

The *system-being-operated* variable was replaced by the boolean *in-operate* in 7c3f979c < https://gitlab.common-lisp.net/asdf/asdf/commit/7c3f979c0db4ac5f224ca634ce9e...

...

.

*systems-being-operated* was a hash with a list of systems or NIL, while *in-operate* is a boolean (T or NIL).

Does some other variable contain the information that *systems-being-operated* held?

Thank you,

Mirko