I tested on xenial by creating an eoan pbuilder.
With the existing debootstrap package (1.0.78+nmu1ubuntu1.8) this fails with error message:
Warning: Unknown distribution "eoan". Do you want to continue [y|N]? n
After upgrading to debootstrap from xenial-proposed (1.0.78+nmu1ubuntu1.9) the eoan pbuilder is created successfully and /etc/os-release inside the pbuilder shows VERSION="19.10 (Eoan EANIMAL)" as expected.
I tested on xenial by creating an eoan pbuilder. nmu1ubuntu1. 8) this fails with error message:
With the existing debootstrap package (1.0.78+
Warning: Unknown distribution "eoan". Do you want to continue [y|N]? n
After upgrading to debootstrap from xenial-proposed (1.0.78+ nmu1ubuntu1. 9) the eoan pbuilder is created successfully and /etc/os-release inside the pbuilder shows VERSION="19.10 (Eoan EANIMAL)" as expected.