1 files changed, 59 insertions, 0 deletions
diff --git a/test/SemaTemplate/deduction-crash.cpp b/test/SemaTemplate/deduction-crash.cpp
new file mode 100644
index 0000000..1860c75
--- /dev/null
+++ b/test/SemaTemplate/deduction-crash.cpp
@@ -0,0 +1,59 @@
+// RUN: %clang_cc1 -fsyntax-only %s 2>&1| FileCheck %s
+
+// PR7511
+
+// Note that the error count below doesn't matter. We just want to
+// make sure that the parser doesn't crash.
+// CHECK: 16 errors
+template<a>
+struct int_;
+
+template<a>
+template<int,typename T1,typename>
+struct ac
+{
+  typedef T1 ae
+};
+
+template<class>struct aaa
+{
+  typedef ac<1,int,int>::ae ae
+};
+
+template<class>
+struct state_machine
+{
+  typedef aaa<int>::ae aaa;
+  int start()
+  {
+    ant(0);
+  }
+  
+  template<class>
+  struct region_processing_helper
+  {
+    template<class,int=0>
+    struct In;
+    
+    template<int my>
+    struct In<a::int_<aaa::a>,my>;
+        
+    template<class Event>
+    int process(Event)
+    {
+      In<a::int_<0> > a;
+    }
+  }
+  template<class Event>
+  int ant(Event)
+  {
+    region_processing_helper<int>* helper;
+    helper->process(0)
+  }
+};
+
+int a()
+{
+  state_machine<int> p;
+  p.ant(0);
+}