Wrap file.declarations with runReadAction

#EA-209932 Fixed

compiler/backend-common/src/org/jetbrains/kotlin/backend/common/CodegenUtil.kt

@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.backend.common
 
+import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.project.Project
 import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.backend.common.bridges.findInterfaceImplementation
@@ -171,10 +172,12 @@ object CodegenUtil {
      * Returns functions, properties and type aliases in the given [file] which should be generated by the back-end.
      */
     @JvmStatic
-    fun getMemberDeclarationsToGenerate(file: KtFile): List<KtDeclaration> =
-        file.declarations.filter { declaration ->
+    fun getMemberDeclarationsToGenerate(file: KtFile): List<KtDeclaration> {
+        val declarations = ApplicationManager.getApplication().runReadAction<List<KtDeclaration>> { file.declarations }
+        return declarations.filter { declaration ->
             !declaration.hasExpectModifier() && (declaration is KtNamedFunction || declaration is KtProperty || declaration is KtTypeAlias)
         }
+    }
 
     @JvmStatic
     fun getMemberDescriptorsToGenerate(file: KtFile, bindingContext: BindingContext): List<MemberDescriptor> =