What is the deal with DW_FORM_GNU_* and DW_FORM_LLVM_* values? They're obviously not on the DWARF5 spec
Same for DW_AT_APPLE_*
DW_AT_subscr_data, DW_AT_subscr_data, DW_AT_element_list, DW_AT_member, DW_AT_dwo_id, DW_AT_ghs_namespace_alias, DW_AT_ghs_rsm, DW_AT_ghs_frsm, DW_AT_ghs_frames, DW_AT_ghs_rso, DW_AT_ghs_subcpu, DW_AT_ghs_lbrace_line, DW_AT_sf_names, DW_AT_src_info, DW_AT_mac_info, DW_AT_src_coords, DW_AT_body_begin, DW_AT_body_end is not to be found on the PDF
DW_AT_bit_offset, DW_AT_macro_info, DW_TAG_mutable_type is deprecated