It seems that dash-0.5.9 is released http://git.kernel.org/cgit/utils/dash/dash.git/commit/?id=801fbd560d334fc94e98fec4097eeac70ea63e3d which fixes some bugs like e.g. printf '%b' 'begin \0 end' (in current dash-0.5.8.2 this outputs "begin "). When bumping, please also consider removing dumb-echo.patch, because this is not XSI compliant (and also breaks with ./configure from autoconf-2.13). I will file a separate bug for this.
Created attachment 442754 [details, diff] dash-0.5.9.ebuild.diff This is the ebuild I am using in my personal overlay right now. If no objections arise I gonna do the version bump in a couple of days.
Author: Lars Wendler <polynomial-c@gentoo.org> Date: Tue Aug 16 09:15:16 2016 app-shells/dash: Bump to version 0.5.9 (bug #590694). Package-Manager: portage-2.3.0 Signed-off-by: Lars Wendler <polynomial-c@gentoo.org> Although I'd prefer to wait for the Debian package, I decided to bump this now as I am using version 0.5.9 for quite a while without any visible problems.