Maintainers for libgcc1-dbg are Debian GCC Maintainers <debian-gcc@lists.debian.org>.
You may want to refer to the following packages that are part of the same source: cpp-8, fixincludes, g++-8, g++-8-multilib, gcc-8, gcc-8-base, gcc-8-hppa64-linux-gnu, gcc-8-locales, gcc-8-multilib, gcc-8-offload-nvptx, gcc-8-plugin-dev, gcc-8-source, gcc-8-test-results, gccbrig-8, gccgo-8, gccgo-8-multilib, gdc-8, gdc-8-multilib, gfortran-8, gfortran-8-multilib, gnat-8, gnat-8-sjlj, gobjc++-8, gobjc++-8-multilib, gobjc-8, gobjc-8-multilib, lib32asan5-dbg, lib32atomic1-dbg, lib32gcc-8-dev, lib32gcc1, lib32gcc1-dbg, lib32gfortran-8-dev, lib32gfortran5-dbg, lib32go13, lib32go13-dbg, lib32gomp1-dbg, lib32gphobos-8-dev, lib32gphobos76-dbg, lib32itm1-dbg, lib32lsan0-dbg, lib32mpx2, lib32mpx2-dbg, lib32objc-8-dev, lib32objc4-dbg, lib32quadmath0-dbg, lib32stdc++-8-dev, lib32stdc++6-8-dbg, lib32ubsan1-dbg, lib64asan5-dbg, lib64atomic1-dbg, lib64gcc-8-dev, lib64gcc1, lib64gcc1-dbg, lib64gfortran-8-dev, lib64gfortran5-dbg, lib64go13, lib64go13-dbg, lib64gomp1-dbg, lib64gphobos-8-dev, lib64gphobos76-dbg, lib64itm1-dbg, lib64mpx2, lib64mpx2-dbg, lib64objc-8-dev, lib64objc4-dbg, lib64quadmath0-dbg, lib64stdc++-8-dev, lib64stdc++6-8-dbg, lib64ubsan1-dbg, libasan5-dbg, libatomic1-dbg, libgcc-8-dev, libgcc1, libgccjit-8-dev, libgccjit-8-doc, libgccjit0-dbg, libgfortran-8-dev, libgfortran5-dbg, libgnat-8, libgnat-8-dbg, libgnatvsn8, libgnatvsn8-dbg, libgnatvsn8-dev, libgo13, libgo13-dbg, libgomp1-dbg, libgphobos-8-dev, libgphobos76-dbg, libhsail-rt-8-dev, libhsail-rt0-dbg, libitm1-dbg, liblsan0-dbg, libmpx2, libmpx2-dbg, libobjc-8-dev, libobjc4-dbg, libquadmath0-dbg, libstdc++-8-dev, libstdc++-8-doc, libstdc++-8-pic, libstdc++6-8-dbg, libtsan0-dbg, libubsan1-dbg, libx32asan5-dbg, libx32atomic1-dbg, libx32gcc-8-dev, libx32gcc1, libx32gcc1-dbg, libx32gfortran-8-dev, libx32gfortran5-dbg, libx32go13, libx32go13-dbg, libx32gomp1-dbg, libx32gphobos-8-dev, libx32gphobos76-dbg, libx32itm1-dbg, libx32lsan0-dbg, libx32objc-8-dev, libx32objc4-dbg, libx32quadmath0-dbg, libx32stdc++-8-dev, libx32stdc++6-8-dbg, libx32ubsan1-dbg.
You might like to refer to the libgcc1-dbg package page, to the Package Tracking System, or to the source package src:gcc-8's bug page.
If you find a bug not listed here, please report it.