JsonWriter#jsonValue(String) throws AssertionError

[HaedHutner]

Relevant code:

https://github.com/Atherys-Horizons/AtherysCore/blob/master/src/main/java/com/atherys/core/gson/AbstractConfigurateAdapter.java#L39

Without getting into the details of it, logger.info(json) outputs the proper Json string. However, JsonWriter#jsonValue(String) right after it throws an AssertionError. Here is the relevant error:

`[19:35:59] [Server thread/INFO] [atheryscore]: Write: {"ContentVersion":1,"ItemType":"minecraft:anvil","Count":1,"UnsafeDamage":0,"UnsafeData":{"display":{"Name":"The Magical Anvil"}}}

[19:35:59] [Server thread/ERROR] [Sponge]: Could not pass FMLServerStartedEvent to Plugin{id=atherysquests, name=A'therys Quests, version=1.0.0b, description=A quest plugin written for the A'therys Horizons server., source=D:\Sponge1122\Server\mods\AtherysQuests-all.jar}
java.lang.AssertionError: null
at com.google.gson.internal.bind.JsonTreeWriter$1.write(JsonTreeWriter.java:36) ~[JsonTreeWriter$1.class:?]
at java.io.Writer.write(Unknown Source) ~[?:1.8.0_161]
at java.io.Writer.write(Unknown Source) ~[?:1.8.0_161]
at java.io.Writer.append(Unknown Source) ~[?:1.8.0_161]
at com.google.gson.stream.JsonWriter.jsonValue(JsonWriter.java:436) ~[JsonWriter.class:?]
at com.atherys.core.gson.AbstractConfigurateAdapter.write(AbstractConfigurateAdapter.java:44) ~[AbstractConfigurateAdapter.class:?]
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[TypeAdapterRuntimeTypeWrapper.class:?]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:125) ~[ReflectiveTypeAdapterFactory$1.class:?]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:243) ~[ReflectiveTypeAdapterFactory$Adapter.class:?]
at com.google.gson.TypeAdapter.toJsonTree(TypeAdapter.java:234) ~[TypeAdapter.class:?]
at com.atherys.core.utils.RuntimeTypeAdapterFactory$1.write(RuntimeTypeAdapterFactory.java:222) ~[RuntimeTypeAdapterFactory$1.class:?]
at com.google.gson.TypeAdapter$1.write(TypeAdapter.java:191) ~[TypeAdapter$1.class:?]
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[TypeAdapterRuntimeTypeWrapper.class:?]
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:97) ~[CollectionTypeAdapterFactory$Adapter.class:?]
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:61) ~[CollectionTypeAdapterFactory$Adapter.class:?]
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[TypeAdapterRuntimeTypeWrapper.class:?]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:125) ~[ReflectiveTypeAdapterFactory$1.class:?]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:243) ~[ReflectiveTypeAdapterFactory$Adapter.class:?]
at com.google.gson.Gson.toJson(Gson.java:669) ~[Gson.class:?]
at com.google.gson.Gson.toJson(Gson.java:648) ~[Gson.class:?]
at com.google.gson.Gson.toJson(Gson.java:603) ~[Gson.class:?]
at com.atherys.quests.AtherysQuests.start(AtherysQuests.java:120) ~[AtherysQuests.class:?]
at com.atherys.quests.AtherysQuests.onStart(AtherysQuests.java:141) ~[AtherysQuests.class:?]
at org.spongepowered.common.event.listener.GameStartedServerEventListener_AtherysQuests_onStart5.handle(Unknown Source) ~[?:?]
at org.spongepowered.common.event.RegisteredListener.handle(RegisteredListener.java:95) ~[RegisteredListener.class:1.12.2-2611-7.1.0-BETA-2970]
at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:335) [SpongeModEventManager.class:1.12.2-2611-7.1.0-BETA-2970]
at org.spongepowered.mod.event.SpongeModEventManager.post(SpongeModEventManager.java:368) [SpongeModEventManager.class:1.12.2-2611-7.1.0-BETA-2970]
at org.spongepowered.common.SpongeImpl.postEvent(SpongeImpl.java:213) [SpongeImpl.class:1.12.2-2611-7.1.0-BETA-2970]
at org.spongepowered.mod.SpongeMod.onStateEvent(SpongeMod.java:240) [SpongeMod.class:1.12.2-2611-7.1.0-BETA-2970]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_161]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_161]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_161]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_161]
at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) [minecraft_server.1.12.2.jar:?]
at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150) [minecraft_server.1.12.2.jar:?]
at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76) [minecraft_server.1.12.2.jar:?]
at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399) [minecraft_server.1.12.2.jar:?]
at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71) [minecraft_server.1.12.2.jar:?]
at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) [minecraft_server.1.12.2.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:217) [minecraft_server.1.12.2.jar:?]
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:278) [LoadController.class:?]
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:256) [LoadController.class:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_161]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_161]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_161]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_161]
at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91) [minecraft_server.1.12.2.jar:?]
at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150) [minecraft_server.1.12.2.jar:?]
at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76) [minecraft_server.1.12.2.jar:?]
at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399) [minecraft_server.1.12.2.jar:?]
at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71) [minecraft_server.1.12.2.jar:?]
at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116) [minecraft_server.1.12.2.jar:?]
at com.google.common.eventbus.EventBus.post(EventBus.java:217) [minecraft_server.1.12.2.jar:?]
at net.minecraftforge.fml.common.LoadController.redirect$onPost$zza000(LoadController.java:560) [LoadController.class:?]
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:148) [LoadController.class:?]
at net.minecraftforge.fml.common.Loader.serverStarted(Loader.java:784) [Loader.class:?]
at net.minecraftforge.fml.common.FMLCommonHandler.handleServerStarted(FMLCommonHandler.java:301) [FMLCommonHandler.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_161]`

[HaedHutner]

Not a Gson-related error. Please ignore.

[Marcono1234]

This is in part actually a valid Gson issue, see #1651. In general using jsonValue(String) should be avoided if you cannot know for sure that the JsonWriter is not actually a JsonTreeWriter at runtime.