KT-25937 Decompilation to Java makes UI lag roughly every 2 seconds, and is not cancellable

GitOrigin-RevId: 58ce5d601bcebb5826cb938f6ea365fa245e7be1

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

@@ -143,6 +143,8 @@ public class NewExprent extends Exprent {
     if (anonymous) {
       ClassNode child = DecompilerContext.getClassProcessor().getMapRootClasses().get(newType.value);
 
+      boolean selfReference = DecompilerContext.getProperty(DecompilerContext.CURRENT_CLASS_NODE) == child;
+
       // IDEA-204310 - avoid backtracking later on for lambdas (causes spurious imports)
       if (!enumConst && (!lambda || DecompilerContext.getOption(IFernflowerPreferences.LAMBDA_TO_ANONYMOUS_CLASS))) {
         String enclosing = null;
@@ -156,33 +158,37 @@ public class NewExprent extends Exprent {
 
         buf.append("new ");
 
-        String typename = ExprProcessor.getCastTypeName(child.anonymousClassType);
-        if (enclosing != null) {
-          ClassNode anonymousNode = DecompilerContext.getClassProcessor().getMapRootClasses().get(child.anonymousClassType.value);
-          if (anonymousNode != null) {
-            typename = anonymousNode.simpleName;
-          }
-          else {
-            typename = typename.substring(typename.lastIndexOf('.') + 1);
+        if (selfReference) {
+          buf.append("<anonymous constructor>");
+        } else {
+          String typename = ExprProcessor.getCastTypeName(child.anonymousClassType);
+          if (enclosing != null) {
+            ClassNode anonymousNode = DecompilerContext.getClassProcessor().getMapRootClasses().get(child.anonymousClassType.value);
+            if (anonymousNode != null) {
+              typename = anonymousNode.simpleName;
+            }
+            else {
+              typename = typename.substring(typename.lastIndexOf('.') + 1);
+            }
           }
-        }
 
-        GenericClassDescriptor descriptor = ClassWriter.getGenericClassDescriptor(child.classStruct);
-        if (descriptor != null) {
-          if (descriptor.superinterfaces.isEmpty()) {
-            buf.append(GenericMain.getGenericCastTypeName(descriptor.superclass));
+          GenericClassDescriptor descriptor = ClassWriter.getGenericClassDescriptor(child.classStruct);
+          if (descriptor != null) {
+            if (descriptor.superinterfaces.isEmpty()) {
+              buf.append(GenericMain.getGenericCastTypeName(descriptor.superclass));
+            }
+            else {
+              if (descriptor.superinterfaces.size() > 1 && !lambda) {
+                DecompilerContext.getLogger().writeMessage("Inconsistent anonymous class signature: " + child.classStruct.qualifiedName,
+                                                           IFernflowerLogger.Severity.WARN);
+              }
+              buf.append(GenericMain.getGenericCastTypeName(descriptor.superinterfaces.get(0)));
+            }
           }
           else {
-            if (descriptor.superinterfaces.size() > 1 && !lambda) {
-              DecompilerContext.getLogger().writeMessage("Inconsistent anonymous class signature: " + child.classStruct.qualifiedName,
-                                                         IFernflowerLogger.Severity.WARN);
-            }
-            buf.append(GenericMain.getGenericCastTypeName(descriptor.superinterfaces.get(0)));
+            buf.append(typename);
           }
         }
-        else {
-          buf.append(typename);
-        }
       }
 
       buf.append('(');
@@ -226,7 +232,7 @@ public class NewExprent extends Exprent {
         buf.append(clsBuf);
         tracer.incrementCurrentSourceLine(clsBuf.countLines());
       }
-      else {
+      else if (!selfReference) {
         TextBuffer clsBuf = new TextBuffer();
         new ClassWriter().classToJava(child, clsBuf, indent, tracer);
         buf.append(clsBuf);

test/org/jetbrains/java/decompiler/BulkDecompilationTest.java

@@ -47,6 +47,11 @@ public class BulkDecompilationTest {
     doTestJar("bulk");
   }
 
+  @Test
+  public void testKtJar() {
+    doTestJar("kt25937");
+  }
+
   @Test
   public void testObfuscated() {
     doTestJar("obfuscated");

testData/kt25937/META-INF/MANIFEST.MF

@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+Created-By: 1.8.0_171 (Oracle Corporation)
+

testData/kt25937/kt/Kt25937Kt.java

@@ -0,0 +1,26 @@
+package kt;
+
+import kotlin.Metadata;
+import kotlin.Unit;
+import kotlin.coroutines.Continuation;
+import kotlin.jvm.functions.Function1;
+import kotlin.jvm.internal.Intrinsics;
+import org.jetbrains.annotations.NotNull;
+
+@Metadata(
+   mv = {1, 1, 16},
+   bv = {1, 0, 3},
+   k = 2,
+   d1 = {"\u0000\u001c\n\u0000\n\u0002\u0010\b\n\u0000\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\u0010\u0002\n\u0002\u0010\u0000\n\u0002\b\u0003\u001a,\u0010\u0000\u001a\u00020\u00012\u001c\u0010\u0002\u001a\u0018\b\u0001\u0012\n\u0012\b\u0012\u0004\u0012\u00020\u00050\u0004\u0012\u0006\u0012\u0004\u0018\u00010\u00060\u0003ø\u0001\u0000¢\u0006\u0002\u0010\u0007\u001a\u0006\u0010\b\u001a\u00020\u0001\u0082\u0002\u0004\n\u0002\b\u0019¨\u0006\t"},
+   d2 = {"callSuspendBlock", "", "block", "Lkotlin/Function1;", "Lkotlin/coroutines/Continuation;", "", "", "(Lkotlin/jvm/functions/Function1;)I", "callSuspendBlockGood", "kotlinx-test"}
+)
+public final class Kt25937Kt {
+   public static final int callSuspendBlock(@NotNull Function1<? super Continuation<? super Unit>, ? extends Object> block) {
+      Intrinsics.checkParameterIsNotNull(block, "block");
+      return 1;
+   }
+
+   public static final int callSuspendBlockGood() {
+      return 1;
+   }
+}

testData/kt25937/kt/Kt25937_1Kt.java

@@ -0,0 +1,49 @@
+package kt;
+
+import kotlin.Metadata;
+import kotlin.ResultKt;
+import kotlin.Unit;
+import kotlin.coroutines.Continuation;
+import kotlin.coroutines.intrinsics.IntrinsicsKt;
+import kotlin.jvm.functions.Function1;
+import kotlin.jvm.internal.Intrinsics;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+@Metadata(
+   mv = {1, 1, 17},
+   bv = {1, 0, 3},
+   k = 2,
+   d1 = {"\u0000\b\n\u0000\n\u0002\u0010\b\n\u0000\u001a\u0006\u0010\u0000\u001a\u00020\u0001¨\u0006\u0002"},
+   d2 = {"some1", "", "ide-kotlin-test.kotlinx-test.main"}
+)
+public final class Kt25937_1Kt {
+   public static final int some1() {
+      return Kt25937Kt.callSuspendBlock((Function1)(new Function1<Continuation<? super Unit>, Object>((Continuation)null) {
+         int label;
+
+         @Nullable
+         public final Object invokeSuspend(@NotNull Object $result) {
+            Object var2 = IntrinsicsKt.getCOROUTINE_SUSPENDED();
+            switch(this.label) {
+            case 0:
+               ResultKt.throwOnFailure($result);
+               return Unit.INSTANCE;
+            default:
+               throw new IllegalStateException("call to 'resume' before 'invoke' with coroutine");
+            }
+         }
+
+         @NotNull
+         public final Continuation<Unit> create(@NotNull Continuation<?> completion) {
+            Intrinsics.checkParameterIsNotNull(completion, "completion");
+            Function1 var2 = new <anonymous constructor>(completion);
+            return var2;
+         }
+
+         public final Object invoke(Object var1) {
+            return ((<undefinedtype>)this.create((Continuation)var1)).invokeSuspend(Unit.INSTANCE);
+         }
+      }));
+   }
+}