1 // RUN: %clang_cc1 -verify %s
2 // REQUIRES: thread_support
3 
4 // FIXME: Detection of, or recovery from, stack exhaustion does not work on
5 // NetBSD at the moment. Since this is a best-effort mitigation for exceeding
6 // implementation limits, just disable the test.
7 // UNSUPPORTED: system-netbsd
8 
9 // expected-warning@* 0-1{{stack nearly exhausted}}
10 // expected-note@* 0+{{}}
11 
12 template<int N> struct X : X<N-1> {};
13 template<> struct X<0> {};
14 X<1000> x;
15 
16 template<typename ...T> struct tuple {};
17 template<typename ...T> auto f(tuple<T...> t) -> decltype(f(tuple<T...>(t))) {} // expected-error {{exceeded maximum depth}}
18 void g() { f(tuple<int, int>()); }
19 
20 int f(X<0>);
21 template<int N> auto f(X<N>) -> f(X<N-1>());
22 
23 int k = f(X<1000>());
24