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1c42199c8f
Apply path remapping to DW_AT_GNU_dwo_name when producing split DWARF `--remap-path-prefix` doesn't apply to paths to `.o` (in case of packed) or `.dwo` (in case of unpacked) files in `DW_AT_GNU_dwo_name`. GCC also has this bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91888
Please read the rustc-dev-guide chapter on Backend Agnostic Codegen.