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Android Proguard - IllegalArgumentException in Jackson TypeReference class

Android app crashes if proguard is used for obfuscation. Below is the stack.

Caused by: java.lang.IllegalArgumentException: Internal error: TypeReference constructed without actual type information at abagb<init>(TypeReference.java:35) at acdq<init>(StdCouchDbInstance.java:22) at acdp<clinit>(StdCouchDbInstance.java:22)

I use the EktorpClient library (for working with couchdb), and StdCouchDbInstance.java refers to this file and TypeReference.java to this package. Any suggestion on which option I should use in the Proguard configuration file to solve this problem?

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I just ran into this problem using Proguard with an Ektorp dependency. The Reference type is general, and -keepattributes Signature will contain general information.

I really used the following which solved my problem.

 -keepattributes Signature,*Annotation*,EnclosingMethod

From Proguard Examples :

The Signature attribute is required to access generic types when compiling in JDK 5.0 and later.

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It seems that ProGuard somehow displays information about the generic type (passing type parameters). I do not know if this will be a known ProGuard problem; but you can check Jackson users mailing list if others come across this. Alternatively, you can try a different version of Jackson, although I don't think the TypeReference class has changed much.

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