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diff --git a/gcc/testsuite/g++.dg/template/crash11.C b/gcc/testsuite/g++.dg/template/crash11.C
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+// { dg-do compile }
+
+// Origin: kparz@iastate.edu
+
+// PR c++/7939: ICE for invalid function parameter after template
+// substitution.
+
+template <class T, class U> void foo(T, U) {}
+template <class T> void foo<T,void>(T, void) {} // { dg-error "incomplete|invalid|partial" }