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			15 lines
		
	
	
		
			499 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
			
		
		
	
	
			15 lines
		
	
	
		
			499 B
		
	
	
	
		
			Solidity
		
	
	
	
	
	
abstract contract A {
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	int public testvar;
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	function foo() internal virtual returns (uint256);
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}
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abstract contract B {
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	function foo() internal returns (uint256);
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	function test() internal virtual returns (uint256);
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}
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abstract contract X is A, B {
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	int public override testvar;
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	function test() internal override returns (uint256);
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}
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// ----
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// TypeError: (218-333): Derived contract must override function "foo". Function with the same name and parameter types defined in two or more base classes.
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