Invalid primitive conversion in toJsonTree()

[nbali]

Gson version

2.12.1
2.10
2.9.1

Java / Android version

Java 17.0.10+11-LTS-240

Used tools

• Maven; version: 3.9.9

Description

The numbers gets converted into broader range (like short to long), but it wasn't a few versions before

Expected behavior

The numbers should be kept as is.

Actual behavior

Short, integer, etc gets converted to long

Reproduction steps

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonObject;

public class GsonPrimitiveTest {
    
    static class TestData {
        // boolean boolean_ = true;
        byte byte_ = 1;
        char char_ = 1;
        short short_ = 1;
        int int_ = 1;
        long long_ = 1L;
        float float_ = 1.f;
        double double_ = 1.d;
        
        // Boolean Boolean_ = true;
        Byte Byte_ = 1;
        Character Character_ = 1;
        Short Short_ = 1;
        Integer Integer_ = 1;
        Long Long_ = 1L;
        Float Float_ = 1.f;
        Double Double_ = 1.d;
    }
    
    public static void main(String[] args) {
        final TestData td = new TestData();
        final Gson gson = new GsonBuilder().create();
        final JsonObject json = gson.toJsonTree(td).getAsJsonObject();
        
        for (String key : json.keySet()) {
            System.out.println(String.format("%10s -> %s", key, json.get(key).getAsJsonPrimitive().getAsNumber().getClass()));
        }
    }
    
}

Gson version 2.12.1:

     byte_ -> class java.lang.Long
     char_ -> class com.google.gson.internal.LazilyParsedNumber
    short_ -> class java.lang.Long
      int_ -> class java.lang.Long
     long_ -> class java.lang.Long
    float_ -> class java.lang.Float
   double_ -> class java.lang.Double
     Byte_ -> class java.lang.Long
Character_ -> class com.google.gson.internal.LazilyParsedNumber
    Short_ -> class java.lang.Long
  Integer_ -> class java.lang.Long
     Long_ -> class java.lang.Long
    Float_ -> class java.lang.Float
   Double_ -> class java.lang.Double

Gson version 2.10:

     byte_ -> class java.lang.Long
     char_ -> class com.google.gson.internal.LazilyParsedNumber
    short_ -> class java.lang.Long
      int_ -> class java.lang.Long
     long_ -> class java.lang.Long
    float_ -> class java.lang.Float
   double_ -> class java.lang.Double
     Byte_ -> class java.lang.Long
Character_ -> class com.google.gson.internal.LazilyParsedNumber
    Short_ -> class java.lang.Long
  Integer_ -> class java.lang.Long
     Long_ -> class java.lang.Long
    Float_ -> class java.lang.Float
   Double_ -> class java.lang.Double

Gson version 2.9.1:

     byte_ -> class java.lang.Byte
     char_ -> class com.google.gson.internal.LazilyParsedNumber
    short_ -> class java.lang.Short
      int_ -> class java.lang.Integer
     long_ -> class java.lang.Long
    float_ -> class java.lang.Float
   double_ -> class java.lang.Double
     Byte_ -> class java.lang.Byte
Character_ -> class com.google.gson.internal.LazilyParsedNumber
    Short_ -> class java.lang.Short
  Integer_ -> class java.lang.Integer
     Long_ -> class java.lang.Long
    Float_ -> class java.lang.Float
   Double_ -> class java.lang.Double

Diff between 2.9.1 and 2.10

Exception stack trace