pragma experimental SMTChecker; contract C { function f(bytes memory data) public pure { (uint a1, bytes32 b1, C c1) = abi.decode(data, (uint, bytes32, C)); (uint a2, bytes32 b2, C c2) = abi.decode(data, (uint, bytes32, C)); assert(a1 == a2); assert(a1 != a2); } } // ---- // Warning 2072: (102-112): Unused local variable. // Warning 2072: (114-118): Unused local variable. // Warning 2072: (172-182): Unused local variable. // Warning 2072: (184-188): Unused local variable. // Warning 8364: (155-156): Assertion checker does not yet implement type type(contract C) // Warning 8364: (225-226): Assertion checker does not yet implement type type(contract C) // Warning 6328: (252-268): CHC: Assertion violation happens here.\nCounterexample:\n\ndata = [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 18, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15]\n\n\nTransaction trace:\nC.constructor()\nC.f([15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 18, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15]) // Warning 8364: (155-156): Assertion checker does not yet implement type type(contract C) // Warning 8364: (225-226): Assertion checker does not yet implement type type(contract C)