Work around odd crash in OpenJ9 due to an anonymous in a mixin.

fabric-renderer-indigo/build.gradle

@@ -1,5 +1,5 @@
 archivesBaseName = "fabric-renderer-indigo"
-version = getSubprojectVersion(project, "0.2.19")
+version = getSubprojectVersion(project, "0.2.20")
 
 dependencies {
 	compile project(path: ':fabric-api-base', configuration: 'dev')

fabric-renderer-indigo/src/main/java/net/fabricmc/fabric/impl/client/indigo/renderer/accessor/AccessItemRenderer.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.impl.client.indigo.renderer.accessor;
+
+import net.minecraft.client.render.VertexConsumer;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.util.math.MatrixStack;
+import net.minecraft.item.ItemStack;
+
+public interface AccessItemRenderer {
+	void fabric_renderBakedItemModel(BakedModel model, ItemStack stack, int light, int overlay, MatrixStack matrixStack, VertexConsumer buffer);
+}

fabric-renderer-indigo/src/main/java/net/fabricmc/fabric/impl/client/indigo/renderer/render/IndigoQuadHandler.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.impl.client.indigo.renderer.render;
+
+import net.minecraft.client.render.VertexConsumer;
+import net.minecraft.client.render.model.BakedModel;
+import net.minecraft.client.util.math.MatrixStack;
+import net.minecraft.item.ItemStack;
+
+import net.fabricmc.fabric.impl.client.indigo.renderer.accessor.AccessItemRenderer;
+
+public class IndigoQuadHandler implements ItemRenderContext.VanillaQuadHandler {
+	private final AccessItemRenderer itemRenderer;
+
+	public IndigoQuadHandler(AccessItemRenderer itemRenderer) {
+		this.itemRenderer = itemRenderer;
+	}
+
+	@Override
+	public void accept(BakedModel model, ItemStack stack, int color, int overlay, MatrixStack matrixStack, VertexConsumer buffer) {
+		itemRenderer.fabric_renderBakedItemModel(model, stack, color, overlay, matrixStack, buffer);
+	}
+}

fabric-renderer-indigo/src/main/java/net/fabricmc/fabric/mixin/client/indigo/renderer/MixinItemRenderer.java

@@ -34,16 +34,18 @@ import net.minecraft.item.ItemStack;
 import net.fabricmc.fabric.api.renderer.v1.model.FabricBakedModel;
 import net.fabricmc.fabric.impl.client.indigo.renderer.render.ItemRenderContext;
 import net.fabricmc.fabric.impl.client.indigo.renderer.render.ItemRenderContext.VanillaQuadHandler;
+import net.fabricmc.fabric.impl.client.indigo.renderer.accessor.AccessItemRenderer;
+import net.fabricmc.fabric.impl.client.indigo.renderer.render.IndigoQuadHandler;
 
 @Mixin(ItemRenderer.class)
-public abstract class MixinItemRenderer {
+public abstract class MixinItemRenderer implements AccessItemRenderer {
 	@Shadow
 	protected abstract void renderBakedItemModel(BakedModel model, ItemStack stack, int light, int overlay, MatrixStack matrixStack, VertexConsumer buffer);
 
 	@Shadow
 	protected ItemColors colorMap;
 
-	private final VanillaQuadHandler vanillaHandler = this::renderBakedItemModel;
+	private final VanillaQuadHandler vanillaHandler = new IndigoQuadHandler(this);
 
 	private final ThreadLocal<ItemRenderContext> CONTEXTS = ThreadLocal.withInitial(() -> new ItemRenderContext(colorMap));
 
@@ -56,4 +58,9 @@ public abstract class MixinItemRenderer {
 			ci.cancel();
 		}
 	}
+
+	@Override
+	public void fabric_renderBakedItemModel(BakedModel model, ItemStack stack, int light, int overlay, MatrixStack matrixStack, VertexConsumer buffer) {
+		renderBakedItemModel(model, stack, light, overlay, matrixStack, buffer);
+	}
 }