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.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@117118 138bc75d-0d04-0410-961f-82ee72b054a4