KT-62071 [AA] Do not throw error from getScopeContextForPosition when implicitScope of receiver value is null

`implicitScope` can be `null`
in case when the implicit receiver resides in a user-defined `kotlin.*`
package, but the user have not yet allowed this with compiler argument
directive.

In this case,
we don't want the IDE to crush and show exceptions - the `kotlin`
package would be highlighted by the compiler diagnostics and other
resolve problems, and that would be enough

^KT-62071 Fixed

analysis/analysis-api-fir/tests-gen/org/jetbrains/kotlin/analysis/api/fir/test/cases/generated/cases/components/scopeProvider/FirIdeDependentAnalysisSourceModuleScopeContextForPositionTestGenerated.java

@@ -100,6 +100,12 @@ public class FirIdeDependentAnalysisSourceModuleScopeContextForPositionTestGener
         runTest("analysis/analysis-api/testData/components/scopeProvider/scopeContextForPosition/localTypeScope.kt");
     }
 
+    @Test
+    @TestMetadata("notEnabledKotlinPackage.kt")
+    public void testNotEnabledKotlinPackage() throws Exception {
+        runTest("analysis/analysis-api/testData/components/scopeProvider/scopeContextForPosition/notEnabledKotlinPackage.kt");
+    }
+
     @Test
     @TestMetadata("simpleScopeContextForPosition.kt")
     public void testSimpleScopeContextForPosition() throws Exception {

analysis/analysis-api-fir/tests-gen/org/jetbrains/kotlin/analysis/api/fir/test/cases/generated/cases/components/scopeProvider/FirIdeNormalAnalysisSourceModuleScopeContextForPositionTestGenerated.java

@@ -100,6 +100,12 @@ public class FirIdeNormalAnalysisSourceModuleScopeContextForPositionTestGenerate
         runTest("analysis/analysis-api/testData/components/scopeProvider/scopeContextForPosition/localTypeScope.kt");
     }
 
+    @Test
+    @TestMetadata("notEnabledKotlinPackage.kt")
+    public void testNotEnabledKotlinPackage() throws Exception {
+        runTest("analysis/analysis-api/testData/components/scopeProvider/scopeContextForPosition/notEnabledKotlinPackage.kt");
+    }
+
     @Test
     @TestMetadata("simpleScopeContextForPosition.kt")
     public void testSimpleScopeContextForPosition() throws Exception {

analysis/analysis-api-standalone/tests-gen/org/jetbrains/kotlin/analysis/api/standalone/fir/test/cases/generated/cases/components/scopeProvider/FirStandaloneNormalAnalysisSourceModuleScopeContextForPositionTestGenerated.java

@@ -100,6 +100,12 @@ public class FirStandaloneNormalAnalysisSourceModuleScopeContextForPositionTestG
         runTest("analysis/analysis-api/testData/components/scopeProvider/scopeContextForPosition/localTypeScope.kt");
     }
 
+    @Test
+    @TestMetadata("notEnabledKotlinPackage.kt")
+    public void testNotEnabledKotlinPackage() throws Exception {
+        runTest("analysis/analysis-api/testData/components/scopeProvider/scopeContextForPosition/notEnabledKotlinPackage.kt");
+    }
+
     @Test
     @TestMetadata("simpleScopeContextForPosition.kt")
     public void testSimpleScopeContextForPosition() throws Exception {

analysis/analysis-api/testData/components/scopeProvider/scopeContextForPosition/notEnabledKotlinPackage.kt

@@ -0,0 +1,9 @@
+// FILE: main.kt
+package kotlin.myPackage
+
+class SomeClass {
+    fun test(param: String) {
+        <expr>param</expr>
+    }
+}
+

analysis/analysis-api/testData/components/scopeProvider/scopeContextForPosition/notEnabledKotlinPackage.pretty.txt

@@ -0,0 +1,51 @@
+element: param
+implicit receivers:
+  type: kotlin.myPackage.SomeClass
+  owner symbol: KtFirNamedClassOrObjectSymbol
+
+scopes:
+  LocalScope, index = 0
+    packages: 0
+    classifiers: 0
+    callables: 0
+    constructors: 0
+
+  LocalScope, index = 1
+    packages: 0
+    classifiers: 0
+    callables: 1
+      param: kotlin.String
+    constructors: 0
+
+  TypeScope, index = 2
+    packages: 0
+    classifiers: 0
+    callables: 0
+    constructors: 0
+
+  ExplicitSimpleImportingScope, index = 3
+    packages: 0
+    classifiers: 0
+    callables: 0
+    constructors: 0
+
+  PackageMemberScope, index = 4
+    packages: 0
+    classifiers: 0
+    callables: 0
+    constructors: 0
+
+  DefaultSimpleImportingScope, index = 5
+
+  DefaultSimpleImportingScope, index = 6
+
+  ExplicitStarImportingScope, index = 7
+    packages: 0
+    classifiers: 0
+    callables: 0
+    constructors: 0
+
+  DefaultSimpleImportingScope, index = 8
+
+  DefaultStarImportingScope, index = 9
+

analysis/analysis-api/testData/components/scopeProvider/scopeContextForPosition/notEnabledKotlinPackage.txt

@@ -0,0 +1,72 @@
+element: param
+implicit receivers:
+  type: KtClassErrorType:
+    annotationsList: []
+    type: ERROR_TYPE
+  owner symbol: KtFirNamedClassOrObjectSymbol
+
+scopes:
+  LocalScope, index = 0
+    packages: 0
+    classifiers: 0
+    callables: 0
+    constructors: 0
+
+  LocalScope, index = 1
+    packages: 0
+    classifiers: 0
+    callables: 1
+      KtValueParameterSymbol:
+        annotationsList: []
+        callableIdIfNonLocal: null
+        contextReceivers: []
+        generatedPrimaryConstructorProperty: null
+        hasDefaultValue: false
+        isCrossinline: false
+        isExtension: false
+        isImplicitLambdaParameter: false
+        isNoinline: false
+        isVararg: false
+        name: param
+        origin: SOURCE
+        receiverParameter: null
+        returnType: KtUsualClassType:
+          annotationsList: []
+          ownTypeArguments: []
+          type: kotlin/String
+        symbolKind: LOCAL
+        typeParameters: []
+    constructors: 0
+
+  TypeScope, index = 2
+    packages: 0
+    classifiers: 0
+    callables: 0
+    constructors: 0
+
+  ExplicitSimpleImportingScope, index = 3
+    packages: 0
+    classifiers: 0
+    callables: 0
+    constructors: 0
+
+  PackageMemberScope, index = 4
+    packages: 0
+    classifiers: 0
+    callables: 0
+    constructors: 0
+
+  DefaultSimpleImportingScope, index = 5
+
+  DefaultSimpleImportingScope, index = 6
+
+  ExplicitStarImportingScope, index = 7
+    packages: 0
+    classifiers: 0
+    callables: 0
+    constructors: 0
+
+  DefaultSimpleImportingScope, index = 8
+
+  DefaultStarImportingScope, index = 9
+

compiler/fir/semantics/src/org/jetbrains/kotlin/fir/declarations/ImplicitReceiverUtils.kt

@@ -282,13 +282,14 @@ class FirTowerDataElement(
     private fun ImplicitReceiverValue<*>.getImplicitScope(
         processTypeScope: FirTypeScope.(ConeKotlinType) -> FirTypeScope,
     ): FirScope {
-        return when (val type = type.fullyExpandedType(useSiteSession)) {
-            is ConeErrorType,
-            is ConeStubType -> FirTypeScope.Empty
-            else -> implicitScope?.processTypeScope(type) ?: errorWithAttachment("Scope for type ${type::class.simpleName} is null") {
-                withConeTypeEntry("type", type)
-            }
-        }
+        // N.B.: implicitScope == null when the type sits in a user-defined 'kotlin' package,
+        // but there is no '-Xallow-kotlin-package' compiler argument provided
+        val implicitScope = implicitScope ?: return FirTypeScope.Empty
+
+        val type = type.fullyExpandedType(useSiteSession)
+        if (type is ConeErrorType || type is ConeStubType) return FirTypeScope.Empty
+
+        return implicitScope.processTypeScope(type)
     }
 }