C++ PATCH for c++/54652 (ICE with repeated typedef/attribute)

Jason Merrill jason@redhat.com
Tue Jan 28 04:16:00 GMT 2014

Since duplicate_decls throws away the new decl before returning 1, we 
need to make sure that we don't have anything pointing to it.  In a 
TYPE_DECL, the type points back to the decl via TYPE_NAME, so we always 
need to choose the type from the olddecl.

Tested x86_64-pc-linux-gnu, applying to trunk and 4.8.
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