rollup/test/form/self-calling-function/main.js

function foo ( x ) {
	if ( x > 0 ) foo( x - 1 );
}

function bar ( x ) {
	if ( x > 0 ) baz( x );
}

function baz ( x ) {
	bar( x - 1 );
}

foo( 10 );
bar( 10 );