Debugger: Fix NPE in CFA during evaluation (KT-32830)

compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowInformationProvider.kt

@@ -35,6 +35,7 @@ import org.jetbrains.kotlin.psi.psiUtil.containingClassOrObject
 import org.jetbrains.kotlin.psi.psiUtil.forEachDescendantOfType
 import org.jetbrains.kotlin.resolve.*
 import org.jetbrains.kotlin.resolve.BindingContext.*
+import org.jetbrains.kotlin.resolve.bindingContextUtil.getEnclosingDescriptor
 import org.jetbrains.kotlin.resolve.bindingContextUtil.isUsedAsExpression
 import org.jetbrains.kotlin.resolve.bindingContextUtil.isUsedAsResultOfLambda
 import org.jetbrains.kotlin.resolve.bindingContextUtil.isUsedAsStatement
@@ -471,7 +472,7 @@ class ControlFlowInformationProvider private constructor(
             trace.get(BACKING_FIELD_REQUIRED, it)
         } ?: true
         if (variableDescriptor is PropertyDescriptor && variableDescriptor.isVar) {
-            val descriptor = BindingContextUtils.getEnclosingDescriptor(trace.bindingContext, expression)
+            val descriptor = getEnclosingDescriptor(trace.bindingContext, expression)
             val setterDescriptor = variableDescriptor.setter
 
             val receiverValue = expression.getResolvedCall(trace.bindingContext)?.getDispatchReceiverWithSmartCast()

compiler/frontend/src/org/jetbrains/kotlin/cfg/ControlFlowProcessor.kt

@@ -50,6 +50,7 @@ import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.BindingContextUtils
 import org.jetbrains.kotlin.resolve.BindingTrace
 import org.jetbrains.kotlin.resolve.CompileTimeConstantUtils
+import org.jetbrains.kotlin.resolve.bindingContextUtil.getEnclosingFunctionDescriptor
 import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
 import org.jetbrains.kotlin.resolve.calls.model.ArgumentMatch
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall
@@ -916,8 +917,8 @@ class ControlFlowProcessor(
         private fun jumpDoesNotCrossFunctionBoundary(jumpExpression: KtExpressionWithLabel, jumpTarget: KtLoopExpression): Boolean {
             val bindingContext = trace.bindingContext
 
-            val labelExprEnclosingFunc = BindingContextUtils.getEnclosingFunctionDescriptor(bindingContext, jumpExpression)
-            val labelTargetEnclosingFunc = BindingContextUtils.getEnclosingFunctionDescriptor(bindingContext, jumpTarget)
+            val labelExprEnclosingFunc = getEnclosingFunctionDescriptor(bindingContext, jumpExpression)
+            val labelTargetEnclosingFunc = getEnclosingFunctionDescriptor(bindingContext, jumpTarget)
             return if (labelExprEnclosingFunc !== labelTargetEnclosingFunc) {
                 // Check to report only once
                 if (builder.getLoopExitPoint(jumpTarget) != null ||

compiler/frontend/src/org/jetbrains/kotlin/resolve/BindingContextUtils.java

@@ -8,12 +8,12 @@ package org.jetbrains.kotlin.resolve;
 import com.google.common.collect.Lists;
 import com.intellij.openapi.util.Pair;
 import com.intellij.psi.PsiElement;
-import com.intellij.psi.util.PsiTreeUtil;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.kotlin.descriptors.*;
 import org.jetbrains.kotlin.diagnostics.Diagnostic;
 import org.jetbrains.kotlin.psi.*;
+import org.jetbrains.kotlin.resolve.bindingContextUtil.BindingContextUtilsKt;
 import org.jetbrains.kotlin.resolve.calls.callUtil.CallUtilKt;
 import org.jetbrains.kotlin.resolve.calls.model.ResolvedCall;
 import org.jetbrains.kotlin.resolve.calls.model.VariableAsFunctionResolvedCall;
@@ -111,31 +111,6 @@ public class BindingContextUtils {
         return value;
     }
 
-    @NotNull
-    public static DeclarationDescriptor getEnclosingDescriptor(@NotNull BindingContext context, @NotNull KtElement element) {
-        KtNamedDeclaration declaration = PsiTreeUtil.getParentOfType(element, KtNamedDeclaration.class);
-        if (declaration instanceof KtFunctionLiteral) {
-            return getEnclosingDescriptor(context, declaration);
-        }
-        DeclarationDescriptor descriptor = context.get(DECLARATION_TO_DESCRIPTOR, declaration);
-        assert descriptor != null : "No descriptor for named declaration: " + declaration.getText() + "\n(of type " + declaration.getClass() + ")";
-        return descriptor;
-    }
-
-    @Nullable
-    public static FunctionDescriptor getEnclosingFunctionDescriptor(@NotNull BindingContext context, @NotNull KtElement element) {
-        KtElement functionOrClass = PsiTreeUtil.getParentOfType(element, KtFunction.class, KtClassOrObject.class);
-        DeclarationDescriptor descriptor = context.get(DECLARATION_TO_DESCRIPTOR, functionOrClass);
-        if (functionOrClass instanceof KtFunction) {
-            if (descriptor instanceof FunctionDescriptor) return (FunctionDescriptor) descriptor;
-            return null;
-        }
-        else {
-            if (descriptor instanceof ClassDescriptor) return ((ClassDescriptor) descriptor).getUnsubstitutedPrimaryConstructor();
-            return null;
-        }
-    }
-
     public static void reportAmbiguousLabel(
             @NotNull BindingTrace trace,
             @NotNull KtSimpleNameExpression targetLabel,

compiler/frontend/src/org/jetbrains/kotlin/resolve/BindingContextUtils.kt

@@ -17,6 +17,8 @@
 package org.jetbrains.kotlin.resolve.bindingContextUtil
 
 import com.intellij.psi.PsiElement
+import com.intellij.psi.util.PsiTreeUtil
+import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.descriptors.impl.AnonymousFunctionDescriptor
@@ -114,4 +116,38 @@ fun KtTypeElement.getAbbreviatedTypeOrType(context: BindingContext): KotlinType?
         }
         else -> null
     }
+}
+
+fun <T : PsiElement> KtElement.getParentOfTypeCodeFragmentAware(vararg parentClasses: Class<out T>): T? {
+    PsiTreeUtil.getParentOfType(this, *parentClasses)?.let { return it }
+
+    val containingFile = this.containingFile
+    if (containingFile is KtCodeFragment) {
+        val context = containingFile.context
+        if (context != null) {
+            return PsiTreeUtil.getParentOfType(context, *parentClasses)
+        }
+    }
+
+    return null
+}
+
+fun getEnclosingDescriptor(context: BindingContext, element: KtElement): DeclarationDescriptor {
+    val declaration = element.getParentOfTypeCodeFragmentAware(KtNamedDeclaration::class.java)
+    return if (declaration is KtFunctionLiteral) {
+        getEnclosingDescriptor(context, declaration)
+    } else {
+        context.get(DECLARATION_TO_DESCRIPTOR, declaration)
+            ?: error("No descriptor for named declaration: " + declaration?.text + "\n(of type " + declaration?.javaClass + ")")
+    }
+}
+
+fun getEnclosingFunctionDescriptor(context: BindingContext, element: KtElement): FunctionDescriptor? {
+    val functionOrClass = element.getParentOfTypeCodeFragmentAware(KtFunction::class.java, KtClassOrObject::class.java)
+    val descriptor = context.get(DECLARATION_TO_DESCRIPTOR, functionOrClass)
+    return if (functionOrClass is KtFunction) {
+        if (descriptor is FunctionDescriptor) descriptor else null
+    } else {
+        if (descriptor is ClassDescriptor) descriptor.unsubstitutedPrimaryConstructor else null
+    }
 }