Constant parameter test, kind of slow though, 46s.

src/main/java/net/runelite/deob/deobfuscators/ConstantParameter.java

@@ -490,6 +490,9 @@ public class ConstantParameter implements Deobfuscator
 				// move things that jump here to instead jump to 'to'
 				for (Instruction i : instructions.getInstructions())
 					i.replace(ins, to);
+
+				for (net.runelite.asm.attributes.code.Exception e : instructions.getCode().getExceptions().getExceptions())
+					e.replace(ins, to);
 				
 				instructions.remove(ins);
 				

src/test/java/net/runelite/deob/deobfuscators/ConstantParameterTest.java

@@ -0,0 +1,40 @@
+package net.runelite.deob.deobfuscators;
+
+import java.io.File;
+import java.io.IOException;
+import net.runelite.asm.ClassGroup;
+import net.runelite.deob.util.JarUtil;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+public class ConstantParameterTest
+{
+	private static final File GAMEPACK = new File(RenameUniqueTest.class.getResource("/gamepack_v16.jar").getFile());
+
+	@Rule
+	public TemporaryFolder folder = new TemporaryFolder();
+
+	private ClassGroup group;
+
+	@Before
+	public void before() throws IOException
+	{
+		group = JarUtil.loadJar(GAMEPACK);
+	}
+
+	@After
+	public void after() throws IOException
+	{
+		JarUtil.saveJar(group, folder.newFile());
+	}
+
+	@Test
+	public void testRun()
+	{
+		ConstantParameter cp = new ConstantParameter();
+		cp.run(group);
+	}
+}