The common behaviour for empty OR and XOR operations is that they evaluate to false. Contrary to this, empty any-of and exactly-one-of groups count as being matched. In the 2017-10-08 council meeting, the following motion passed: 1) PMS changes as detailed in https://archives.gentoo.org/gentoo-pms/message/a612bdc64f7aa3e556b129a67493da1b 2) note that PMS team comes up with a proposal for the next EAPI to define a behavior that seems correct in terms of resolver and our uses The first change has been applied retroactively (matching Portage behaviour and the state of the Gentoo repository). The proposal for EAPI 7 is to have empty any-of and exactly-one-of groups (which still can result from collapsing USE conditionals) evaluate to false.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/proj/portage.git/commit/?id=9ebd5865559aa17186c23c90c6a90894449dc3ac commit 9ebd5865559aa17186c23c90c6a90894449dc3ac Author: Michał Górny <mgorny@gentoo.org> AuthorDate: 2018-02-26 13:09:32 +0000 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: 2018-03-04 21:03:52 +0000 Empty || *DEPEND group no longer satisfy deps in EAPI 7 Bug: https://bugs.gentoo.org/636596 pym/portage/dep/__init__.py | 3 +++ pym/portage/tests/resolver/test_eapi.py | 9 ++++++++- 2 files changed, 11 insertions(+), 1 deletion(-) https://gitweb.gentoo.org/proj/portage.git/commit/?id=83f059e7db3a269e994e70f98b0e406f819b19e5 commit 83f059e7db3a269e994e70f98b0e406f819b19e5 Author: Michał Górny <mgorny@gentoo.org> AuthorDate: 2018-02-26 12:48:37 +0000 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: 2018-03-04 21:03:52 +0000 Empty ||/^^ REQUIRED_USE groups are no longer true in EAPI 7 Bug: https://bugs.gentoo.org/636596 pym/portage/dep/__init__.py | 4 ++-- pym/portage/eapi.py | 10 ++++++++-- pym/portage/tests/dep/testCheckRequiredUse.py | 5 +++-- pym/portage/tests/resolver/test_required_use.py | 8 ++++++++ 4 files changed, 21 insertions(+), 6 deletions(-)}
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/proj/pms.git/commit/?id=7d6c155014d082cfc2b37f8a0ffee61feb275ea8 commit 7d6c155014d082cfc2b37f8a0ffee61feb275ea8 Author: Ulrich Müller <ulm@gentoo.org> AuthorDate: 2017-11-05 11:26:44 +0000 Commit: Ulrich Müller <ulm@gentoo.org> CommitDate: 2018-03-30 16:35:43 +0000 EAPI 7: Empty || and ^^ groups no longer count as matched. Bug: https://bugs.gentoo.org/636596 dependencies.tex | 21 +++++++++++++++++++-- eapi-differences.tex | 6 ++++++ 2 files changed, 25 insertions(+), 2 deletions(-)}
