StackOverflowError in the preprocessor when generating converters via @CompiledJson

[vrasidas-at-b2c2]

Hi,

Thank you very much for creating and maintaining this fantastic library!

I am getting a stack overflow error in some cases when using the @CompiledJson annotation.

Error:

...
Caused by: java.lang.StackOverflowError
	at java.base/java.lang.String.valueOf(String.java:2951)
	at java.base/java.lang.StringBuilder.append(StringBuilder.java:168)
	at jdk.compiler/com.sun.tools.javac.util.List.toString(List.java:326)
	at jdk.compiler/com.sun.tools.javac.util.List.toString(List.java:339)
	at jdk.compiler/com.sun.tools.javac.code.Type$ClassType.toString(Type.java:1027)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:179)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:203)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:188)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:203)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:188)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:203)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:188)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:203)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:188)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:203)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:188)
	at com.dslplatform.json.processor.AttributeInfo.createTypeSignature(AttributeInfo.java:203)
...

We are using Java 11 and the minimal repro for this is:

package foo;

import com.dslplatform.json.CompiledJson;

@CompiledJson
public class GenericClass<T> implements Comparable<GenericClass<T>> {

    final T genericField;

    public GenericClass(T genericField) {
        this.genericField = genericField;
    }

    public final T getGenericField() {
        return genericField;
    }

    @Override
    public int compareTo(GenericClass<T> other) {
        return 1;
    }
}

Any help with this would be appreciated!

[zapov]

Tnx for the report.
I managed to reproduce it.
Will look into how to resolve this.

[zapov]

I've pushed a fix on master. It seems only bound generics were supported more extensively.
I added basic support for unbounded ones so your case will now work, but there is significant more work to fully wrap the generics support.

[vrasidas-at-b2c2]

Thank you very much @zapov for looking into this.

Are you planning to release the fix any time soon?

[zapov]

Yes. Probably this or next week

[zapov]

v1.10 released