Maintainers for libgeos-dev are Debian GIS Project <pkg-grass-devel@lists.alioth.debian.org>.
You may want to refer to the following packages that are part of the same source: geos-bin, libgeos++-dev, libgeos-3.7.1, libgeos-3.9.0, libgeos-c1t64, libgeos-c1v5, libgeos-doc, libgeos3.11.1, libgeos3.12.1t64, ruby-geos.
You might like to refer to the libgeos-dev package page, to the Package Tracking System, or to the source package src:geos's bug page.
If you find a bug not listed here, please report it.