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			20 lines
		
	
	
		
			259 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
			
		
		
	
	
			20 lines
		
	
	
		
			259 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
// run-pass
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fn f(mut y: Box<isize>) {
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    *y = 5;
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    assert_eq!(*y, 5);
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}
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fn g() {
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    let frob = |mut q: Box<isize>| { *q = 2; assert_eq!(*q, 2); };
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    let w = Box::new(37);
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    frob(w);
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}
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pub fn main() {
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    let z = Box::new(17);
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    f(z);
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    g();
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}
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