Fatal error: Attempted to read an unowned reference but object was already deallocated

Hello,

With the latest release of SwiftSoup (2.3.7), I've been seeing crashes that didn't occur before. The crash occurs when selecting an element and wrapping it, as in this example:

if let quote = try? doc.select("blockquote") {
     _ = try? quote.wrap("<details ontoggle='postQuoteHeightChange()'></details>")
}

This yields the message Fatal error: Attempted to read an unowned reference but object 0x------------ was already deallocated, with Xcode showing a SIGABRT at line 470 of Node.swift:

SwiftSoup/Sources/Node.swift

Line 470 in bc4350f

if (input.parentNode != nil) {

The issue disappears if I roll SwiftSoup back to 2.3.6.

Hi, yes it is the change that i do with 2.3.7.
I make a rollback with 2.3.8 that is now online. I will fine a different solution for the other issue