pragma experimental SMTChecker; contract C { struct S { uint x; bool b; } S public s; constructor() { s.x = 1; s.b = false; } function f() public { uint x; bool b; (x,b) = this.s(); assert(x == s.x); // this should hold assert(b == s.b); // this should hold assert(b == true); // this should fail s.x = 42; (uint y, bool c) = this.s(); assert(c == b); // this should hold assert(y == x); // this should fail } } // ---- // Warning 6328: (288-305): CHC: Assertion violation happens here. // Warning 6328: (410-424): CHC: Assertion violation happens here.