LLDB error: unknown type name 'let', Xcode 8.1

Question

I am trying to unsafe cast an UIImageView in LLDB. I am getting the error: unknown type name 'let'. Here is a screen shot error: unknown type name

I have tried importing UIkit

expr -l Swift -- import UIKit

but it does not fix the issue.

Compare stackoverflow.com/a/38905566/1187415. – And it is .self, not .safe — Martin R
– Martin R, Commented Dec 14, 2016 at 20:11
Comparison has been made before posting the question, hence the mention of expr -l Swift -- import UIKit not working. — Carlos De la Mora
– Carlos De la Mora, Commented Dec 15, 2016 at 2:16

Jim Ingham · Accepted Answer · 2016-12-16 23:34:14Z

3

It looks to me like you are trying to evaluate a swift expression when not stopped in a Swift frame. lldb guesses the appropriate language to use for expressions from the language of the current frame. If this were C then "let" is in the position to be a type name, making sense of the error.

What happens if you do:

(lldb) expr -l swift --

You can force all expressions to be run as swift expressions using:

(lldb) settings set target.language swift

if that suits your purposes better.

answered Dec 16, 2016 at 23:34

Jim Ingham

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1 Comment

Carlos De la Mora Over a year ago

(lldb) expr -l swift -- Enter expressions, then terminate with an empty line to evaluate: 1 I do not know what happened but after restarting the application I can not replicate the problem.

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