[Bug debug/20998] [3.4/4.0/4.1 Regression] GCC does not emit debug info for variables in anonymous unions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-12 06:06 -------
(In reply to comment #2)
> It is because of ALIAS_DECL
Which means it was caused by:
2002-12-18  Jason Merrill  <jason@redhat.com>
        
        Handle anonymous unions at the tree level.
        C++ ABI change: Mangle anonymous unions using the name of their
        first named field (by depth-first search).  Should not cause
        binary compatibility problems, though, as the compiler previously
        didn't emit anything for affected unions.
        * cp-tree.def (ALIAS_DECL): New tree code.

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           What    |Removed                     |Added
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                 CC|                            |jason at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20998