[Bug binutils/29192] New: addr2line suspected incompatibility with DWARF5

[ofekshilon at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29192

            Bug ID: 29192
           Summary: addr2line suspected incompatibility with DWARF5
           Product: binutils
           Version: 2.38
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: ofekshilon at gmail dot com
  Target Milestone: ---

==========Example:
$ cat toy.cpp
#include <iostream>
int main() {
        std::cout << "hello world";
        return 0;
}
$ clang-14 -g -stdlib=libc++ -lc++ -I/usr/lib/llvm-14/include/c++/v1 toy.cpp -o
toy14
$ addr2line -fe ./toy 0x1234
addr2line: DWARF error: invalid or unhandled FORM value: 0x25
main
??:?
=========end example

According to the dwarf5 spec (https://dwarfstd.org/doc/DWARF5.pdf), section
7.5.6 page 221, 0x25 is a valid DW_FORM value:

      DW_FORM_strx1 ‡ 0x25 string.


In other cases (not yet reduced to a small repro) we see:
  addr2line: Dwarf Error: Could not find abbrev number 127

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