[FIR] Allow resolve to private members from debugger evaluator

KT-60714

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/FirCallResolver.kt

@@ -55,6 +55,7 @@ import org.jetbrains.kotlin.resolve.calls.tasks.ExplicitReceiverKind
 import org.jetbrains.kotlin.resolve.calls.tower.CandidateApplicability
 import org.jetbrains.kotlin.resolve.calls.tower.isSuccess
 import org.jetbrains.kotlin.types.Variance
+import org.jetbrains.kotlin.util.CodeFragmentAdjustment
 
 class FirCallResolver(
     private val components: FirAbstractBodyResolveTransformer.BodyResolveTransformerComponents,
@@ -765,7 +766,13 @@ class FirCallResolver(
 
             !applicability.isSuccess -> {
                 val candidate = candidates.single()
-                createConeDiagnosticForCandidateWithError(applicability, candidate)
+                if (needTreatErrorCandidateAsResolved(candidate)) {
+                    @OptIn(CodeFragmentAdjustment::class)
+                    candidate.resetToResolved()
+                    null
+                } else {
+                    createConeDiagnosticForCandidateWithError(applicability, candidate)
+                }
             }
 
             else -> null
@@ -820,6 +827,13 @@ class FirCallResolver(
         return FirNamedReferenceWithCandidate(source, name, candidate)
     }
 
+    private fun needTreatErrorCandidateAsResolved(candidate: Candidate): Boolean {
+        return if (candidate.isCodeFragmentVisibilityError) {
+            components.resolutionStageRunner.fullyProcessCandidate(candidate, transformer.resolutionContext)
+            candidate.diagnostics.all { it.applicability.isSuccess || it.applicability == CandidateApplicability.K2_VISIBILITY_ERROR }
+        } else false
+    }
+
     private fun createErrorReferenceForSingleCandidate(
         candidate: Candidate?,
         diagnostic: ConeDiagnostic,

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/Candidate.kt

@@ -7,9 +7,10 @@ package org.jetbrains.kotlin.fir.resolve.calls
 
 import org.jetbrains.kotlin.KtFakeSourceElementKind
 import org.jetbrains.kotlin.fakeElement
-import org.jetbrains.kotlin.fir.FirElement
 import org.jetbrains.kotlin.fir.declarations.FirValueParameter
-import org.jetbrains.kotlin.fir.expressions.*
+import org.jetbrains.kotlin.fir.expressions.FirExpression
+import org.jetbrains.kotlin.fir.expressions.FirSmartCastExpression
+import org.jetbrains.kotlin.fir.expressions.FirThisReceiverExpression
 import org.jetbrains.kotlin.fir.expressions.builder.buildThisReceiverExpressionCopy
 import org.jetbrains.kotlin.fir.expressions.impl.FirExpressionStub
 import org.jetbrains.kotlin.fir.expressions.impl.FirNoReceiverExpression
@@ -20,7 +21,6 @@ import org.jetbrains.kotlin.fir.scopes.FirScope
 import org.jetbrains.kotlin.fir.symbols.FirBasedSymbol
 import org.jetbrains.kotlin.fir.types.ConeKotlinType
 import org.jetbrains.kotlin.fir.types.ConeTypeVariable
-import org.jetbrains.kotlin.fir.visitors.FirTransformer
 import org.jetbrains.kotlin.resolve.calls.inference.ConstraintSystemOperation
 import org.jetbrains.kotlin.resolve.calls.inference.model.ConstraintStorage
 import org.jetbrains.kotlin.resolve.calls.inference.model.ConstraintSystemError
@@ -28,6 +28,7 @@ import org.jetbrains.kotlin.resolve.calls.inference.model.NewConstraintSystemImp
 import org.jetbrains.kotlin.resolve.calls.tasks.ExplicitReceiverKind
 import org.jetbrains.kotlin.resolve.calls.tower.CandidateApplicability
 import org.jetbrains.kotlin.resolve.calls.tower.isSuccess
+import org.jetbrains.kotlin.util.CodeFragmentAdjustment
 
 class Candidate(
     override val symbol: FirBasedSymbol<*>,
@@ -103,6 +104,12 @@ class Candidate(
         }
     }
 
+    @CodeFragmentAdjustment
+    internal fun resetToResolved() {
+        currentApplicability = CandidateApplicability.RESOLVED
+        _diagnostics.clear()
+    }
+
     val isSuccessful: Boolean
         get() = currentApplicability.isSuccess && (!systemInitialized || !system.hasContradiction)
 

compiler/fir/resolve/src/org/jetbrains/kotlin/fir/resolve/calls/VisibilityUtils.kt

@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.fir.types.coneType
 import org.jetbrains.kotlin.fir.types.isNullableNothing
 import org.jetbrains.kotlin.fir.types.makeConeTypeDefinitelyNotNullOrNotNull
 import org.jetbrains.kotlin.fir.types.typeContext
+import org.jetbrains.kotlin.resolve.calls.tower.CandidateApplicability
 import org.jetbrains.kotlin.utils.addToStdlib.runIf
 
 fun FirVisibilityChecker.isVisible(
@@ -136,3 +137,7 @@ private fun isExplicitReceiverExpression(receiverExpression: FirExpression?): Bo
     val thisReference = receiverExpression.toReference() as? FirThisReference ?: return true
     return !thisReference.isImplicit
 }
+
+internal val Candidate.isCodeFragmentVisibilityError
+    get() = applicability == CandidateApplicability.K2_VISIBILITY_ERROR &&
+            callInfo.containingFile.declarations.singleOrNull() is FirCodeFragment

compiler/frontend.common/src/org/jetbrains/kotlin/util/CodeFragmentAdjustment.kt

@@ -0,0 +1,9 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.util
+
+@RequiresOptIn(message = "Should be used only for code fragment resolve/generation adjustments")
+annotation class CodeFragmentAdjustment