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[Bug c++/15507] New: hang laying out union


compiling this hangs:

struct A {
  // empty
};

struct B : A {
  int b;
};

union U {
  A a;
  B b;
};

-- 
           Summary: hang laying out union
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sdouglass at arm dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15507


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