Gentoo's Bugzilla –
Attachment 661509 Details for
Bug 743613gnome-base/librsvg-2.48.8 on musl-1.2.1: /usr/lib/rust-1.46.0/rustlib/x86_64-unknown-linux-musl/lib/libunwind-6bcb0d8697a865ce.rlib(elf64.o): in function `_Uelf64_get_proc_name_in_image': undefined reference to `lzma_stream_footer_decode'