fix: show method alias in "method not decompiled" messages (#410)

jadx-core/src/main/java/jadx/core/codegen/MethodGen.java

@@ -4,6 +4,8 @@ import java.util.Iterator;
 import java.util.List;
 
 import com.android.dx.rop.code.AccessFlags;
+import jadx.core.dex.info.ClassInfo;
+import jadx.core.utils.Utils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -165,8 +167,16 @@ public class MethodGen {
 			addFallbackMethodCode(code);
 			code.startLine("*/");
 
+			ClassInfo clsAlias = mth.getParentClass().getAlias();
+
 			code.startLine("throw new UnsupportedOperationException(\"Method not decompiled: ")
-					.add(mth.toString())
+					.add(clsAlias.makeFullClsName(clsAlias.getShortName(), true))
+					.add(".")
+					.add(mth.getAlias())
+					.add("(")
+					.add(Utils.listToString(mth.getMethodInfo().getArgumentsTypes()))
+					.add("):")
+					.add(mth.getMethodInfo().getReturnType().toString())
 					.add("\");");
 		} else {
 			RegionGen regionGen = new RegionGen(this);