Invoking a (Java) smart contract that is using Runtime.log("..") will cause: "COULD NOT GET STR LENGTH!" could not execute command: maximum recursion depth exceeded about neo-python HOT 7 CLOSED

I tested on C# VM, and can confirm that string concatenation didn't work.

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Interesting. Can you post the SC, or a reduced version that allows to reproduce this behaviour?

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This happens when you add a trace log statement using Runtime.log(..) that concatenates a String, for instance:

public static boolean Main(boolean b) {
    Runtime.log("Main("
        + "b=" + b          
        + ")");
        return true;
    }
}

Without the concatenation it works just fine. For instance, doing:

Runtime.log("Main()"); 

does not cause this problem.

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Does this run in the C# VM?

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I'm running a smart contract written in Java on the neo-privatenet-docker using the NEO python node / SDK.

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Hi @popsteegh

I'm not familiar with the Java compiler and what kind of byte code it outputs for string concatenation, but I have a feeling this wouldn't work in the C# VM.
If you could attach the compiled .avm file I could test it out.

Usually ( at least with a SC compiled with python ) strings need to use the special concat method to be concatenated.

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Hi @localhuman,

Sorry for the delay, busy (Christmas) times ;)

Please find attached the .avm file that you can test out (I had to zip it, because GitHub does not support attaching .avm files)

Test.avm.zip

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