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// RUN: %clang_cc1 -std=c++17 -fsyntax-only -verify %s
// expected-no-diagnostics
// Check recursive instantiation of lambda does not cause assertion.
// lambda function `f` in `fun1` is instantiated twice: first
// as f(f, Number<1>), then as f(f, Number<0>). The
// LocalInstantiationScopes of these two instantiations both contain
// `f` and `i`. However, since they are not merged, clang should not
// assert for that.
template <unsigned v>
struct Number
{
static constexpr unsigned value = v;
};
template <unsigned IBegin = 0,
unsigned IEnd = 1>
constexpr auto fun1(Number<IBegin> = Number<0>{}, Number<IEnd> = Number<1>{})
{
constexpr unsigned a = 0;
auto f = [&](auto fs, auto i) {
if constexpr(i.value > 0)
{
(void)a;
return fs(fs, Number<IBegin>{});
}
(void)a;
};
return f(f, Number<IEnd>{});
}
void fun2() {
fun1();
}
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