Cleaning output files: out/production/module/B.class End of files Compiling files: src/B.kt End of files Cleaning output files: out/production/module/CompanionExtensionKt.class out/production/module/CompanionReferenceExplicitKt.class out/production/module/CompanionReferenceImplicitKt.class out/production/module/ImportedMemberKt.class out/production/module/META-INF/module.kotlin_module End of files Compiling files: src/companionExtension.kt src/companionReferenceExplicit.kt src/companionReferenceImplicit.kt src/importedMember.kt End of files COMPILATION FAILED Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type kotlin.String? Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type kotlin.String? Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type kotlin.String? Only safe (?.) or non-null asserted (!!.) calls are allowed on a nullable receiver of type kotlin.String? Cleaning output files: out/production/module/B.class End of files Compiling files: src/B.kt src/companionExtension.kt src/companionReferenceExplicit.kt src/companionReferenceImplicit.kt src/importedMember.kt End of files