Type demangling error in Xcode 10 beta 6 Playgrounds

CTMacUser · 2018-09-09T19:14:41.715Z

Since I've been using Xcode 10 beta 6, I've gotten:

SWIFT RUNTIME BUG: unable to demangle type of field 'base'. mangled type name is '5IndexSlQz'

whenever I do experiments with collections. The actual names ("base" and "5IndexSlQz" here) differ on what I'm actually doing; as it has happened on at least two playgrounds. Has anyone else noticed this? Is there an upcoming fix yet?

tkremenek · 2018-09-10T02:50:36.164Z

This is likely:

GitHub

Issues · apple/swift

The Swift Programming Language. Contribute to apple/swift development by creating an account on GitHub.

That is a fix on master.

@Mike_Ash was looking to see if it is fixed in the 4.2 branch.