diff --git a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/KtFirAnalysisSession.kt b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/KtFirAnalysisSession.kt
index 94da7030fd2..1e5b6a45fd5 100644
--- a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/KtFirAnalysisSession.kt
+++ b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/KtFirAnalysisSession.kt
@@ -9,6 +9,7 @@ import com.intellij.openapi.project.Project
 import com.intellij.psi.search.GlobalSearchScope
 import org.jetbrains.kotlin.analysis.api.InvalidWayOfUsingAnalysisSession
 import org.jetbrains.kotlin.analysis.api.KtAnalysisSession
+import org.jetbrains.kotlin.analysis.api.assertIsValidAndAccessible
 import org.jetbrains.kotlin.analysis.api.components.*
 import org.jetbrains.kotlin.analysis.api.fir.components.*
 import org.jetbrains.kotlin.analysis.api.fir.symbols.KtFirOverrideInfoProvider
diff --git a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/KtSymbolByFirBuilder.kt b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/KtSymbolByFirBuilder.kt
index 71eac338dc2..7b1e58ccd29 100644
--- a/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/KtSymbolByFirBuilder.kt
+++ b/analysis/analysis-api-fir/src/org/jetbrains/kotlin/analysis/api/fir/KtSymbolByFirBuilder.kt
@@ -9,10 +9,7 @@ import com.intellij.openapi.project.Project
 import com.intellij.psi.JavaPsiFacade
 import com.intellij.psi.search.GlobalSearchScope
 import com.intellij.util.containers.ContainerUtil
-import org.jetbrains.kotlin.analysis.api.KtStarProjectionTypeArgument
-import org.jetbrains.kotlin.analysis.api.KtTypeArgument
-import org.jetbrains.kotlin.analysis.api.KtTypeArgumentWithVariance
-import org.jetbrains.kotlin.analysis.api.ValidityTokenOwner
+import org.jetbrains.kotlin.analysis.api.*
 import org.jetbrains.kotlin.analysis.api.fir.symbols.*
 import org.jetbrains.kotlin.analysis.api.fir.types.*
 import org.jetbrains.kotlin.analysis.api.fir.utils.weakRef
diff --git a/analysis/symbol-light-classes/src/org/jetbrains/kotlin/light/classes/symbol/IDEKotlinAsJavaFirSupport.kt b/analysis/symbol-light-classes/src/org/jetbrains/kotlin/light/classes/symbol/IDEKotlinAsJavaFirSupport.kt
index b9a2fc9c205..154ae0f6914 100644
--- a/analysis/symbol-light-classes/src/org/jetbrains/kotlin/light/classes/symbol/IDEKotlinAsJavaFirSupport.kt
+++ b/analysis/symbol-light-classes/src/org/jetbrains/kotlin/light/classes/symbol/IDEKotlinAsJavaFirSupport.kt
@@ -8,10 +8,7 @@ package org.jetbrains.kotlin.light.classes.symbol
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiClass
 import com.intellij.psi.search.GlobalSearchScope
-import org.jetbrains.kotlin.analysis.project.structure.KtBinaryModule
-import org.jetbrains.kotlin.analysis.project.structure.KtLibrarySourceModule
-import org.jetbrains.kotlin.analysis.project.structure.KtNotUnderContentRootModule
-import org.jetbrains.kotlin.analysis.project.structure.getKtModule
+import org.jetbrains.kotlin.analysis.project.structure.*
 import org.jetbrains.kotlin.analysis.providers.createDeclarationProvider
 import org.jetbrains.kotlin.analysis.providers.createPackageProvider
 import org.jetbrains.kotlin.asJava.KotlinAsJavaSupport
@@ -23,9 +20,7 @@ import org.jetbrains.kotlin.light.classes.symbol.classes.getOrCreateFirLightFaca
 import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.parentOrNull
-import org.jetbrains.kotlin.psi.KtClassOrObject
-import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.psi.KtScript
+import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.utils.addToStdlib.ifNotEmpty
 
 class IDEKotlinAsJavaFirSupport(private val project: Project) : KotlinAsJavaSupport() {
@@ -84,8 +79,10 @@ class IDEKotlinAsJavaFirSupport(private val project: Project) : KotlinAsJavaSupp
             .getKotlinSubPackageFqNames(fqn)
             .map { fqn.child(it) }
 
-    override fun getLightClass(classOrObject: KtClassOrObject): KtLightClass? =
-        getOrCreateFirLightClass(classOrObject)
+    override fun getLightClass(classOrObject: KtClassOrObject): KtLightClass? {
+        if (!classOrObject.isFromSource()) return null
+        return getOrCreateFirLightClass(classOrObject)
+    }
 
     override fun getLightClassForScript(script: KtScript): KtLightClass =
         error("Should not be called")
@@ -105,21 +102,35 @@ class IDEKotlinAsJavaFirSupport(private val project: Project) : KotlinAsJavaSupp
     override fun getFacadeClassesInPackage(packageFqName: FqName, scope: GlobalSearchScope): Collection<PsiClass> =
         project.createDeclarationProvider(scope)
             .getFacadeFilesInPackage(packageFqName)
+            .asSequence()
+            .filter { it.isFromSource() }
             .groupBy { it.javaFileFacadeFqName }
             .mapNotNull { getOrCreateFirLightFacade(it.value, it.key) }
 
     override fun getFacadeNames(packageFqName: FqName, scope: GlobalSearchScope): Collection<String> =
         project.createDeclarationProvider(scope)
             .getFacadeFilesInPackage(packageFqName)
+            .filter { it.isFromSource() }
             .mapTo(mutableSetOf()) { it.javaFileFacadeFqName.shortName().asString() }
 
-    override fun findFilesForFacade(facadeFqName: FqName, scope: GlobalSearchScope): Collection<KtFile> =
-        project.createDeclarationProvider(scope)
+    override fun findFilesForFacade(facadeFqName: FqName, scope: GlobalSearchScope): Collection<KtFile> {
+        return project.createDeclarationProvider(scope)
             .findFilesForFacade(facadeFqName)
+            .filter { it.isFromSource() }
+    }
 
     override fun getFakeLightClass(classOrObject: KtClassOrObject): KtFakeLightClass =
         KtFirBasedFakeLightClass(classOrObject)
 
     override fun createFacadeForSyntheticFile(facadeClassFqName: FqName, file: KtFile): PsiClass =
         TODO("Not implemented")
+}
+
+
+private fun KtElement.isFromSource(): Boolean {
+    if (this is KtFile && isCompiled) {
+        // small optimisation to not invoke expensive getKtModule
+        return false
+    }
+    return getKtModule(project) is KtSourceModule
 }
\ No newline at end of file
diff --git a/analysis/symbol-light-classes/src/org/jetbrains/kotlin/light/classes/symbol/classes/FirLightClassForFacade.kt b/analysis/symbol-light-classes/src/org/jetbrains/kotlin/light/classes/symbol/classes/FirLightClassForFacade.kt
index a1cb974f6ca..994be2cb627 100644
--- a/analysis/symbol-light-classes/src/org/jetbrains/kotlin/light/classes/symbol/classes/FirLightClassForFacade.kt
+++ b/analysis/symbol-light-classes/src/org/jetbrains/kotlin/light/classes/symbol/classes/FirLightClassForFacade.kt
@@ -40,6 +40,12 @@ class FirLightClassForFacade(
 
     init {
         require(files.isNotEmpty())
+        /*
+        Actually, here should be the following check
+        require(files.all { it.getKtModule() is KtSourceModule })
+        but it is quite expensive
+         */
+        require(files.none { it.isCompiled })
     }
 
     private val firstFileInFacade by lazyPub { files.first() }