Project won't build on Ubuntu 24.04 with Swift 5.10 Release

[Dirk-Vantas]

Summary

Compilation error encountered when running swift build on Ubuntu 24.04 with swift 5.10 Release

Steps to Reproduce

1. Set up the project environment on Ubuntu 24.04.
2. Run the command swift build.

Expected Results

The project should compile successfully without any errors.

Actual Results

The following error is thrown during the compilation:

In file : /ZIPFoundation/Sources/ZIPFoundation/Archive+MemoryFile.swift:45:20:

error: value of optional type 'UnsafeMutablePointer<FILE>?' (aka 'Optional<UnsafeMutablePointer<_IO_FILE>>') must be unwrapped to a value of type 'UnsafeMutablePointer<FILE>' (aka 'UnsafeMutablePointer<_IO_FILE>')
fseeko(result, 0, SEEK_END)

Small fix I have been using so far

I modified the MemoryFile() function slightly, just so the error does not get thrown during building.

class MemoryFile {
    private(set) var data: Data
    private var offset = 0

    init(data: Data = Data()) {
        self.data = data
    }

    func open(mode: String) -> FILEPointer? {
        let cookie = Unmanaged.passRetained(self)
        let writable = mode.count > 0 && (mode.first! != "r" || mode.last! == "+")
        let append = mode.count > 0 && mode.first! == "a"
        #if os(macOS) || os(iOS) || os(tvOS) || os(visionOS) || os(watchOS) || os(Android)
        let result = writable
            ? funopen(cookie.toOpaque(), readStub, writeStub, seekStub, closeStub)
            : funopen(cookie.toOpaque(), readStub, nil, seekStub, closeStub)
        #else
        let stubs = cookie_io_functions_t(read: readStub, write: writeStub, seek: seekStub, close: closeStub)
        let result = fopencookie(cookie.toOpaque(), mode, stubs)
        #endif
        if append {
            if let unwrappedResult = result {
                fseeko(unwrappedResult, 0, SEEK_END)
            } else {
                // Handle the error if result is nil
                print("Error: result is nil when attempting to open in append mode")
                return nil
            }
        }
        return result
    }
}