Libgdx JsonWriter StackOverflowError-Collection of common programming errors

11 years ago

admin

2 minutes

I’m getting a StackOverflowError when trying to write an object to json with com.badlogic.gdx.utils.Json, which is based on jsonbeans. The object and all objects it references only contain primitive variables like float, boolean, int, etc except for references to a ShapeRenderer. Multiple objects all reference the same ShapeRenderer. There are some circular references (objects both having a reference to each other) but i assume it should be able to handle that.

What could be the cause of these errors? Are the circular references the problem? I can’t simply remove them without going back to the drawing board and restructuring major parts of my app.

Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.StackOverflowError
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:111)
Caused by: java.lang.StackOverflowError
    at java.util.regex.Pattern$CharProperty$1.isSatisfiedBy(Unknown Source)
    at java.util.regex.Pattern$7.isSatisfiedBy(Unknown Source)
    at java.util.regex.Pattern$7.isSatisfiedBy(Unknown Source)
    at java.util.regex.Pattern$7.isSatisfiedBy(Unknown Source)
    at java.util.regex.Pattern$7.isSatisfiedBy(Unknown Source)
    at java.util.regex.Pattern$CharProperty.match(Unknown Source)
    at java.util.regex.Pattern$Curly.match0(Unknown Source)
    at java.util.regex.Pattern$Curly.match(Unknown Source)
    at java.util.regex.Pattern$CharProperty.match(Unknown Source)
    at java.util.regex.Matcher.match(Unknown Source)
    at java.util.regex.Matcher.matches(Unknown Source)
    at com.badlogic.gdx.utils.JsonWriter$OutputType.quoteName(JsonWriter.java:174)
    at com.badlogic.gdx.utils.JsonWriter.name(JsonWriter.java:46)
    at com.badlogic.gdx.utils.JsonWriter.set(JsonWriter.java:113)
    at com.badlogic.gdx.utils.Json.writeType(Json.java:574)
    at com.badlogic.gdx.utils.Json.writeObjectStart(Json.java:533)
    at com.badlogic.gdx.utils.Json.writeValue(Json.java:491)
    at com.badlogic.gdx.utils.Json.writeFields(Json.java:237)
    at com.badlogic.gdx.utils.Json.writeValue(Json.java:492)
    at com.badlogic.gdx.utils.Json.writeFields(Json.java:237)
    at com.badlogic.gdx.utils.Json.writeValue(Json.java:492)
    at com.badlogic.gdx.utils.Json.writeFields(Json.java:237)
    at com.badlogic.gdx.utils.Json.writeValue(Json.java:492)
    at com.badlogic.gdx.utils.Json.writeFields(Json.java:237)

This goes on for about 1024 lines:

    at com.badlogic.gdx.utils.Json.writeValue(Json.java:492)
    at com.badlogic.gdx.utils.Json.writeFields(Json.java:237)

Not sure whether that’s the log limit or the stack limit, i guess the first one.