re PR c++/54090 (internal compiler error: in unify, at cp/pt.c:15731)

2017-10-15  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/54090
	* g++.dg/template/crash128.C: New.

From-SVN: r253772

gcc/testsuite/ChangeLog

+2017-10-15  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/54090
+	* g++.dg/template/crash128.C: New.
+
 2017-10-15  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/82372

gcc/testsuite/g++.dg/template/crash128.C

+// PR c++/54090
+
+template <int n>
+struct X {
+
+  template <int N, bool = (n >= N), typename T = void> struct Y;
+
+  template <int N, typename T>
+  struct Y<N, true, T> {};
+
+  static const int M = n / 2;
+
+  template <typename T>
+  struct Y<X::M, true, T> {};
+};
+
+void foo() {
+  X<10>::Y<10/2> y;
+}