solidity/test/libsolidity/syntaxTests/nameAndTypeResolution/211_uninitialized_mapping_array_variable.sol

contract C {
    function f() pure public {
        mapping(uint => uint)[] storage x;
        x;
    }
}
// ----
// TypeError: (95-96): This variable is of storage pointer type and can be accessed without prior assignment, which would lead to undefined behaviour.