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addr2line.c: fix
DW_FORM_ref_addr
parsing for DWARF 2 (#8146)
addr2line.c: fix DW_FORM_ref_addr parsing for DWARF 2 This fixes a crash when retrieving backtrace info with YJIT enabled on macOS with Rust 1.71.0. Since Rust 1.71.0, the DWARF info generated by the Rust compiler uses DW_FORM_ref_addr instead of DW_FORM_ref4 for pointers to other DIEs. DW_FORM_ref_addr representation in DWARF 2 is different from DWARF 3+, so we need to handle it separately. This patch fixes the parsing of DW_FORM_ref_addr for DWARF 2, which is the default DWARF version Rustc uses on macOS. See the DWARF 2.0.0 spec, section 7.5.4 Attribute Encodings https://dwarfstd.org/doc/dwarf-2.0.0.pdf https://bugs.ruby-lang.org/issues/19789
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