> $ nm -l a.exe
> 00406000 b .bssBFD: Dwarf Error: Could not find abbrev number 120.
> 00406018 b .bssBFD: Dwarf Error: Could not find abbrev number 120.
> [...]
> 00406040 b _u.25303BFD: Dwarf Error: Could not find abbrev number 120.
> 00401000 T _WinMainCRTStartup
> /usr/src/debug/cygwin-2.2.1-1/winsup/cygwin/crt0.c:23
> 004070b8 i fthunkBFD: Dwarf Error: Could not find abbrev number 120.
> 00407074 i hnameBFD: Dwarf Error: Could not find abbrev number 120.
> 
> Ken

Kai is of the opinion that rebuilding the gcc, CRT, Cygwin and
everything in between be rebuilt with the new binutils to solve the issue.

Might be a huge undertaking.