PR c++/28303
        * decl.c (grokdeclarator): Return error_mark_node on
        declaration with two or more data types.

        * g++.dg/template/typedef6.C: New test.
        * g++.dg/init/error1.C: Adjust error markers.
        * g++.dg/parse/crash9.C: Likewise.
        * g++.dg/template/crash55.C: Likewise.

From-SVN: r117118