ICC 17.0.2 rejects valid C++ template function specialization

The following code is rejected with the message
test.cpp(19): error: declaration is incompatible with function template "void Foo::bar(Vec<, T>) [with N=0]" (declared at line 11) void Foo<0>::bar(Vec<0, T> x) {}

Compiled with: icpc -std=c++14 test.cpp
icpc --version
icpc (ICC) 17.0.2 20170213
Copyright (C) 1985-2017 Intel Corporation. All rights reserved.

constexpr int getN(int n) {
    return n;
};

template<int N, typename T>
struct Vec{ };

template<int N>
struct Foo
{
  template<typename T> void bar(Vec<getN(N), T> x);

  //// A workaround
  // static constexpr int n = getN(N);
  // template<typename T> void bar(Vec<n, T> x);
};

template<> template <typename T>
void Foo<0>::bar(Vec<0, T> x) {}

Thanks,
Matthias Hochsteger