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#include <iostream>
 
template <int i, int j>
void fn()
{
	std::cout << "1 ";
	fn<i + 1, j>();
}
 
template <int j>
void fn<j, j>()
{
	std::cout << "2 ";
}
 
int main()
{
	fn<0, 4>();
}
 

prog.cpp:11:15: error: non-class, non-variable partial specialization ‘fn<j, j>’ is not allowed
 void fn<j, j>()
               ^
prog.cpp: In instantiation of ‘void fn() [with int i = 899; int j = 4]’:
prog.cpp:7:14:   recursively required from ‘void fn() [with int i = 1; int j = 4]’
prog.cpp:7:14:   required from ‘void fn() [with int i = 0; int j = 4]’
prog.cpp:18:11:   required from here
prog.cpp:7:14: fatal error: template instantiation depth exceeds maximum of 900 (use -ftemplate-depth= to increase the maximum)
  fn<i + 1, j>();
  ~~~~~~~~~~~~^~
compilation terminated.

Standard output is empty