mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
31 lines
529 B
Solidity
31 lines
529 B
Solidity
pragma experimental SMTChecker;
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abstract contract D {
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function d() external virtual;
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}
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contract C {
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uint x;
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D d;
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bool lock;
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modifier mutex {
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require(!lock);
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lock = true;
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_;
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lock = false;
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}
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function set(uint _x) mutex public {
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x = _x;
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}
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function f() public {
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uint y = x;
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d.d();
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assert(y == x);
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}
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}
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// ----
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// Warning 6328: (307-321): CHC: Assertion violation happens here.\nCounterexample:\nx = 1, d = 0, lock = false\n\nTransaction trace:\nC.constructor()\nState: x = 0, d = 0, lock = false\nC.f()
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