Fixes #97

src/main/java/zone/rong/mixinbooter/MixinBooterPlugin.java

@@ -23,6 +23,7 @@
 import org.spongepowered.asm.mixin.ModUtil;
 import org.spongepowered.asm.mixin.transformer.Config;
 import zone.rong.mixinbooter.fix.MixinFixer;
+import zone.rong.mixinbooter.util.MockedArtifactVersionAdapter;
 import zone.rong.mixinbooter.util.MockedMetadataCollection;
 
 import java.io.InputStreamReader;
@@ -110,7 +111,7 @@ private void initialize() {
     }
 
     private void gatherPresentMods() {
-        Gson gson = new GsonBuilder().registerTypeAdapter(ArtifactVersion.class, new MetadataCollection.ArtifactVersionAdapter())
+        Gson gson = new GsonBuilder().registerTypeAdapter(ArtifactVersion.class, new MockedArtifactVersionAdapter())
                 .setLenient()
                 .create();
         try {

src/main/java/zone/rong/mixinbooter/util/MockedArtifactVersionAdapter.java

@@ -0,0 +1,50 @@
+package zone.rong.mixinbooter.util;
+
+import com.google.gson.TypeAdapter;
+import com.google.gson.stream.JsonReader;
+import com.google.gson.stream.JsonWriter;
+import net.minecraftforge.fml.common.versioning.ArtifactVersion;
+
+import java.io.IOException;
+
+public class MockedArtifactVersionAdapter extends TypeAdapter<ArtifactVersion> {
+
+    @Override
+    public void write(JsonWriter out, ArtifactVersion value) { }
+
+    @Override
+    public ArtifactVersion read(JsonReader in) throws IOException {
+        in.nextString();
+        return new MockedArtifactVersion();
+    }
+
+    private static class MockedArtifactVersion implements ArtifactVersion {
+
+        @Override
+        public String getLabel() {
+            return "";
+        }
+
+        @Override
+        public String getVersionString() {
+            return "";
+        }
+
+        @Override
+        public boolean containsVersion(ArtifactVersion source) {
+            return false;
+        }
+
+        @Override
+        public String getRangeString() {
+            return "";
+        }
+
+        @Override
+        public int compareTo(ArtifactVersion o) {
+            return 0;
+        }
+
+    }
+
+}