bug#30745: 26.0.91; ert should macros nest strangely

[Noam Postavsky]

Noam Postavsky <npostavs@gmail.com> writes:

> The main blocker for this is the other thing:
>
>>> But it bumps into another bug lurking in process.c, which just happened
>>> to work okay previously because ert would bind debug-on-error while
>>> running tests.

Also it seems to be breaking some electric tests

   FAILED  electric-layout-plainer-c-mode-use-c-style
   FAILED  electric-modes-int-main-allman-style

I don't really have any clue why though.