Import of middle HMPP target platforms is supported

idea/idea-jvm/src/org/jetbrains/kotlin/idea/facet/FrameworkLibraryValidatorWithDynamicDescription.kt

@@ -37,7 +37,7 @@ class FrameworkLibraryValidatorWithDynamicDescription(
         private val context: LibrariesValidatorContext,
         private val validatorsManager: FacetValidatorsManager,
         private val libraryCategoryName: String,
-        private val getPlatform: () -> TargetPlatform
+        private val getPlatform: () -> TargetPlatform?
 ) : FrameworkLibraryValidator() {
     private val IdePlatformKind<*>.libraryDescription: CustomLibraryDescription?
         get() = this.tooling.getLibraryDescription(context.module.project)
@@ -69,7 +69,7 @@ class FrameworkLibraryValidatorWithDynamicDescription(
     }
 
     override fun check(): ValidationResult {
-        val targetPlatform = getPlatform()
+        val targetPlatform = getPlatform() ?: return ValidationResult("No target platforms selected")
 
         if (checkLibraryIsConfigured(targetPlatform.idePlatformKind)) {
             val conflictingPlatforms = IdePlatformKind.ALL_KINDS

idea/idea-jvm/src/org/jetbrains/kotlin/idea/facet/KotlinLibraryValidatorCreator.kt

@@ -28,6 +28,6 @@ class KotlinLibraryValidatorCreator : KotlinFacetValidatorCreator() {
                 DelegatingLibrariesValidatorContext(editorContext),
                 validatorsManager,
                 "kotlin"
-        ) { editor.chosenPlatform!! }
+        ) { editor.getChosenPlatform() }
     }
 }