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diff --git a/gcc/testsuite/g++.dg/template/crash26.C b/gcc/testsuite/g++.dg/template/crash26.C
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+// { dg-do compile }
+
+// Origin: Volker Reichelt <reichelt@gcc.gnu.org>
+
+// PR c++/18471: ICE redeclaration of typedef as class template
+
+typedef int X; // { dg-error "previous" }
+template<X> struct X {}; // { dg-error "typedef-name" }