Could not parse type with internal type: undefined for custom structure

I have some contracts using a library structure data storage, compiled using an older version of Solidity, but which throw an error asking me to make a report here.

In the libraryType.sol contract I have something like this:

library PersonLib {
    struct Data {
        bool   isActive;
        bytes  hashOfData;
        string handle;
    }
    function handle(Data storage self) public view returns (string) {
        return self.handle;
    }
    function markActive(Data storage self) internal {
        self.isActive = true;
    }
    //other getters & setters omitted
}

In other contracts, the library contract is imported and the type of a variable or struct member might be PersonLib.Data - sometimes, there are more than one of the same type in the same file (e.g. a Requester and a Contributor with wrapper functions similar to this:

    function requesterHandle() public view returns (string) {
        return requester.handle;
    }
    function updateRequesterHandle(string newHandle) public {
        emit RequesterHandleUpdated(newHandle);
        PersonLib.updateHandle(requester, newHandle);
    }

That works fine in Solidity, but when trying to generate types with TypeChain, that triggers an error like this:

Could not parse type: PersonLib.Data storage with internal type: undefined.

Please submit a GitHub Issue to the TypeChain team with the failing contract/library.

This error report is hereby filed per request. Hopefully I haven’t missed something important when attempting to make it a minimal example for the report.

[StefanoGagliardi]

Thanks for your reply!

I got an error with this parameters: --target=truffle-v4 and Solidity version “0.6.4”. I also try with solidity version “0.4.24” and same target --target=truffle-v4.

Both case i got this error: Error occured: Class extends value undefined is not a constructor or null. I was unable to get the same message you posted at the beginning of this issue.

1. You got the same error?
2. NB: More important, I was thinking where is the problem to generate Type using like target: “truffle-v5” ?
   “V5” is related to Typechain is not related with ethereum. Please try to compile Smart Contracts with this target and give me a feedback. If there are no compilation errors I would say close the issue as “truffle-v4” I think is deprecated, correct? @krzkaczor

[wbt]

I wound up changing Typechain and dependencies to use --target=truffle-v4 and it still produced the same errors.