decompiler: do not fail on the invalid bytecode in IDEA

src/org/jetbrains/java/decompiler/main/extern/IFernflowerPreferences.java

@@ -1,6 +1,4 @@
-/*
- * Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
- */
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package org.jetbrains.java.decompiler.main.extern;
 
 import org.jetbrains.java.decompiler.util.InterpreterUtil;
@@ -33,6 +31,7 @@ public interface IFernflowerPreferences {
   String IDEA_NOT_NULL_ANNOTATION = "inn";
   String LAMBDA_TO_ANONYMOUS_CLASS = "lac";
   String BYTECODE_SOURCE_MAPPING = "bsm";
+  String FAIL_ON_INVALID_BYTECODE = "fib";
 
   String LOG_LEVEL = "log";
   String MAX_PROCESSING_METHOD = "mpm";
@@ -76,6 +75,7 @@ public interface IFernflowerPreferences {
     defaults.put(IDEA_NOT_NULL_ANNOTATION, "1");
     defaults.put(LAMBDA_TO_ANONYMOUS_CLASS, "0");
     defaults.put(BYTECODE_SOURCE_MAPPING, "0");
+    defaults.put(FAIL_ON_INVALID_BYTECODE, "1");
 
     defaults.put(LOG_LEVEL, IFernflowerLogger.Severity.INFO.name());
     defaults.put(MAX_PROCESSING_METHOD, "0");

src/org/jetbrains/java/decompiler/modules/decompiler/exps/ExprUtil.java

@@ -4,6 +4,7 @@ package org.jetbrains.java.decompiler.modules.decompiler.exps;
 import org.jetbrains.java.decompiler.code.CodeConstants;
 import org.jetbrains.java.decompiler.main.ClassesProcessor.ClassNode;
 import org.jetbrains.java.decompiler.main.DecompilerContext;
+import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;
 import org.jetbrains.java.decompiler.main.rels.ClassWrapper;
 import org.jetbrains.java.decompiler.main.rels.MethodWrapper;
 import org.jetbrains.java.decompiler.modules.decompiler.vars.VarVersionPair;
@@ -25,7 +26,7 @@ public class ExprUtil {
     if (wrapper != null) {
       // own class
       MethodWrapper methodWrapper = wrapper.getMethodWrapper(CodeConstants.INIT_NAME, descriptor);
-      if (methodWrapper == null) {
+      if (methodWrapper == null && !DecompilerContext.getOption(IFernflowerPreferences.FAIL_ON_INVALID_BYTECODE)) {
         return null;
       }
       mask = methodWrapper.synthParameters;

test/org/jetbrains/java/decompiler/SingleClassesTest.java

@@ -23,7 +23,8 @@ public class SingleClassesTest {
   public void setUp() throws IOException {
     fixture = new DecompilerTestFixture();
     fixture.setUp(IFernflowerPreferences.BYTECODE_SOURCE_MAPPING, "1",
-                  IFernflowerPreferences.DUMP_ORIGINAL_LINES, "1");
+                  IFernflowerPreferences.DUMP_ORIGINAL_LINES, "1",
+                  IFernflowerPreferences.FAIL_ON_INVALID_BYTECODE, "0");
   }
 
   @After