--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/torture/pr52772.C	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,85 @@
+// { dg-do compile }
+
+typedef __SIZE_TYPE__ size_t;
+
+class c1;
+
+class c2 {
+  public: c2() { };
+  void *operator new(size_t size, const c1 & crc1);
+};
+
+class c3 {
+  public: c3() { _Obj = 0; }
+  ~c3() { if (_Obj) delete _Obj; }
+  void set(c2 *pObj);
+  protected: c2 *_Obj;
+};
+
+void c3::set(c2 *pObj) { _Obj = pObj; };
+
+template<class TYPE> class tc1 : public c2 {
+  public: tc1(int n=0){};
+  int get() const;
+  TYPE& operator[] (int id);
+  TYPE * _data;
+  int _size;
+};
+
+template<class TYPE> TYPE & tc1<TYPE>::operator[] (int id) {
+  return _data[id];
+}
+ 
+template<class TYPE> int tc1<TYPE>::get() const {
+  return _size;
+}
+
+class c4 {
+  public: c4();
+};
+
+class c5 : public c2 {
+  protected: c2 * _own;
+  public: c5(c2 *o) : _own(o) { }
+  c5(const c4 & box);
+  int add(const c4 & ext);
+};
+
+class c6 {
+  public: int get() const {};
+};
+
+class c7 {
+  friend class c8;
+  int find(c6 * loop) const;
+};
+
+class c8 {
+  const c1 & _rc1;
+  int tria(c7 * face, c5 * vtree0 = 0);
+};
+
+int c8::tria(c7 * face, c5 * vtree0) {
+  c6 *sLData[64];
+  tc1<c6*> loops(64);
+  while (loops.get() > 1) { 
+    c6 *iloop = 0; 
+    for (int j=1; j<loops.get(); j++) { 
+      if (loops[j]->get() < 32) { 
+        iloop = loops[j];
+      }
+    }
+    face->find(iloop);
+  }
+  c4 box;
+  c3 ctree;
+  c5 *vtree = vtree0;
+  if (!vtree) { 
+    vtree = new (_rc1) c5(box); 
+    ctree.set(vtree); 
+    for (int j=0; j<1; j++) { 
+      c4 sVBBox; 
+      vtree->add(sVBBox);
+    }
+  }
+}