FWICS, the default of USE=-slirp disables '-net user' and the error message is completely unhelpful: qemu-system-x86_64: Parameter 'type' expects a netdev backend type I think it'd really be preferable to default to IUSE=+slirp, so that users suddenly don't lose networking by default.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=419a580ff4ffa72a4314a7befa0e64ceed21fa54 commit 419a580ff4ffa72a4314a7befa0e64ceed21fa54 Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2020-07-17 19:39:01 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2020-07-17 19:39:18 +0000 app-emulation/qemu: enable USE=slirp by default Reported-by: Michał Górny Closes: https://bugs.gentoo.org/733098 Package-Manager: Portage-2.3.103, Repoman-2.3.23 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> app-emulation/qemu/qemu-5.0.0-r2.ebuild | 2 +- app-emulation/qemu/qemu-9999.ebuild | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)