The issue happens because starting from DWARF v5 DW_AT_addr_base attribute should be used instead of DW_AT_GNU_addr_base. LLDB does not do that and we end up reading the .debug_addr header as section content (as addresses) instead of skipping it and reading the real addresses. Then LLDB is unable to match 2 similar locations and thinks they are different. Differential revision: https://reviews.llvm.org/D54751 llvm-svn: 347842