Filter unknown invokedynamic bsm

src/main/java/net/fabricmc/loom/task/RemapJarTask.java

@@ -33,6 +33,7 @@ import java.util.LinkedHashSet;
 import java.util.Set;
 
 import com.google.common.base.Preconditions;
+import net.fabricmc.loom.util.*;
 import org.gradle.api.Project;
 import org.gradle.api.file.RegularFileProperty;
 import org.gradle.api.provider.Property;
@@ -44,12 +45,7 @@ import org.zeroturnaround.zip.ZipUtil;
 
 import net.fabricmc.loom.LoomGradleExtension;
 import net.fabricmc.loom.providers.MappingsProvider;
-import net.fabricmc.loom.util.GradleSupport;
-import net.fabricmc.loom.util.MixinRefmapHelper;
-import net.fabricmc.loom.util.NestedJars;
-import net.fabricmc.loom.util.TinyRemapperMappingsHelper;
 import net.fabricmc.loom.util.accesswidener.AccessWidenerJarProcessor;
-import net.fabricmc.loom.util.JarRemapper;
 import net.fabricmc.stitch.util.Pair;
 import net.fabricmc.tinyremapper.OutputConsumerPath;
 import net.fabricmc.tinyremapper.TinyRemapper;
@@ -104,7 +100,8 @@ public class RemapJarTask extends Jar {
 				project.getConfigurations().getByName("compileClasspath").getFiles()
 		);
 		Path[] classpath = classpathFiles.stream().map(File::toPath).filter((p) -> !input.equals(p) && Files.exists(p)).toArray(Path[]::new);
-
+		
+		LoggerFilter.replaceSystemOut();
 		TinyRemapper.Builder remapperBuilder = TinyRemapper.newRemapper();
 
 		remapperBuilder = remapperBuilder.withMappings(TinyRemapperMappingsHelper.create(extension.isForge() ? mappingsProvider.getMappingsWithSrg() : mappingsProvider.getMappings(), fromM, toM, false));

src/main/java/net/fabricmc/loom/util/JarRemapper.java

@@ -62,6 +62,7 @@ public class JarRemapper {
 	}
 
 	public void remap() throws IOException {
+		LoggerFilter.replaceSystemOut();
 		TinyRemapper.Builder remapperBuilder = TinyRemapper.newRemapper();
 		mappingProviders.forEach(remapperBuilder::withMappings);
 

src/main/java/net/fabricmc/loom/util/LoggerFilter.java

@@ -0,0 +1,47 @@
+/*
+ * This file is part of fabric-loom, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2016, 2017, 2018 FabricMC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.fabricmc.loom.util;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.io.PrintStream;
+
+public class LoggerFilter {
+	public static void replaceSystemOut() {
+		try {
+			PrintStream previous = System.out;
+			System.setOut(new PrintStream(previous) {
+				@Override
+				public PrintStream printf(@NotNull String format, Object... args) {
+					if (format.equals("unknown invokedynamic bsm: %s/%s%s (tag=%d iif=%b)%n")) {
+						return this;
+					}
+					return super.printf(format, args);
+				}
+			});
+		} catch (SecurityException ignored) {
+		}
+	}
+}

src/main/java/net/fabricmc/loom/util/ModProcessor.java

@@ -146,6 +146,7 @@ public class ModProcessor {
 		project.getLogger().lifecycle(":remapping " + remapList.size() + " mods (TinyRemapper, " + fromM + " -> " + toM + ")");
 
 		TinyTree mappings = extension.isForge() ? mappingsProvider.getMappingsWithSrg() : mappingsProvider.getMappings();
+		LoggerFilter.replaceSystemOut();
 		TinyRemapper remapper = TinyRemapper.newRemapper()
 						.withMappings(TinyRemapperMappingsHelper.create(mappings, fromM, toM, false))
 						.renameInvalidLocals(false)