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			7 lines
		
	
	
		
			115 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
			
		
		
	
	
			7 lines
		
	
	
		
			115 B
		
	
	
	
		
			Rust
		
	
	
	
	
	
| #![feature(register_tool)]
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| 
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| #![register_tool(1)]
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| //~^ ERROR `register_tool` only accepts identifiers
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| 
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| fn main() {}
 | 
