See More
Popular Forum

MBA (4887) B.Tech (1769) Engineering (1486) Class 12 (1030) Study Abroad (1004) Computer Science and Engineering (988) Business Management Studies (865) BBA (846) Diploma (746) CAT (651) B.Com (648) B.Sc (643) JEE Mains (618) Mechanical Engineering (574) Exam (525) India (462) Career (452) All Time Q&A (439) Mass Communication (427) BCA (417) Science (384) Computers & IT (Non-Engg) (383) Medicine & Health Sciences (381) Hotel Management (373) Civil Engineering (353) MCA (349) Tuteehub Top Questions (348) Distance (340) Colleges in India (334)
See More

Failed to demangle superclass with Cocoapods in Xcode 10.2

General Tech Bugs & Fixes

Max. 2000 characters



( 6 months ago )


After moving to Xcode 10.2, when running my app I get a crash with the error failed to demangle superclass of MyClass from mangled name MySuperClass.

The crash occurs when I try to create an instance of MyClass. I am using CocoaPods 1.6.1 and have not yet upgraded to Swift 5. The class in question is defined inside a Pod, and is a subclass of a class defined a different Pod (listed as a sub dependency of the first Pod).

Adding to the complexity (unsure if it is related) is that the super class takes a generic, and the sub class defines a concrete type and does not take a generic. I.e.

// Inside Pod B:
open class MySuperClass<DataType: Decodable> { ... }

// Inside Pod A:
open class MySubClass: MySuperClass<AConcreteStructConformingToCodable> { ... }

// Inside my project:
let myClass = MySubClass()

I have tried overriding the Pod build settings to build with and without optmisation without any change in behaviour.

what's your interest