Multifile facade should contain reflection data,

otherwise callable references to stdlib functions will not work in the migration scheme.

compiler/backend/src/org/jetbrains/kotlin/codegen/MultifileClassCodegen.kt

@@ -27,6 +27,7 @@ import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
 import org.jetbrains.kotlin.descriptors.PackageFragmentDescriptor
 import org.jetbrains.kotlin.diagnostics.DiagnosticUtils
 import org.jetbrains.kotlin.fileClasses.getFileClassType
+import org.jetbrains.kotlin.load.java.JvmAbi
 import org.jetbrains.kotlin.load.java.JvmAnnotationNames
 import org.jetbrains.kotlin.load.kotlin.PackageParts
 import org.jetbrains.kotlin.load.kotlin.incremental.IncrementalPackageFragmentProvider
@@ -35,9 +36,13 @@ import org.jetbrains.kotlin.progress.ProgressIndicatorAndCompilationCanceledStat
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.MemberComparator
+import org.jetbrains.kotlin.resolve.jvm.AsmTypes
+import org.jetbrains.kotlin.resolve.jvm.diagnostics.JvmDeclarationOrigin
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.MultifileClass
 import org.jetbrains.kotlin.resolve.jvm.diagnostics.MultifileClassPart
 import org.jetbrains.org.objectweb.asm.Opcodes
+import org.jetbrains.org.objectweb.asm.Type
+import org.jetbrains.org.objectweb.asm.commons.InstructionAdapter
 import java.util.*
 
 
@@ -111,6 +116,7 @@ public class MultifileClassCodegen(
             tasks: Map<CallableMemberDescriptor, () -> Unit>,
             partFqNames: List<FqName>
     ) {
+        generateKotlinPackageReflectionField()
         MemberCodegen.generateModuleNameField(state, classBuilder)
 
         for (member in tasks.keySet().sortedWith(MemberComparator.INSTANCE)) {
@@ -150,7 +156,6 @@ public class MultifileClassCodegen(
                 }
             }
             else if (declaration is JetScript) {
-
                 // SCRIPT: generate script code, should be separate execution branch
                 if (state.generateDeclaredClassFilter.shouldGenerateScript(declaration)) {
                     ScriptCodegen.createScriptCodegen(declaration, state, partContext).generate()
@@ -182,6 +187,16 @@ public class MultifileClassCodegen(
         }
     }
 
+    private fun generateKotlinPackageReflectionField() {
+        val mv = classBuilder.newMethod(JvmDeclarationOrigin.NO_ORIGIN, Opcodes.ACC_STATIC, "<clinit>", "()V", null, null)
+        val method = AsmUtil.method("createKotlinPackage",
+                                    AsmTypes.K_PACKAGE_TYPE, AsmTypes.getType(Class::class.java), AsmTypes.getType(String::class.java))
+        val iv = InstructionAdapter(mv)
+        MemberCodegen.generateReflectionObjectField(state, facadeClassType, classBuilder, method, JvmAbi.KOTLIN_PACKAGE_FIELD_NAME, iv)
+        iv.areturn(Type.VOID_TYPE)
+        FunctionCodegen.endVisit(mv, "package facade static initializer", null)
+    }
+
     private fun writeKotlinMultifileFacadeAnnotationIfNeeded(partFqNames: List<FqName>) {
         if (state.classBuilderMode != ClassBuilderMode.FULL) return
         if (files.any { it.isScript }) return

compiler/testData/codegen/boxWithStdlib/reflection/functions/functionFromStdlib.kt

@@ -0,0 +1,5 @@
+fun doStuff(fn: String.() -> String) = "ok".fn()
+
+fun box(): String {
+    return doStuff(String::toUpperCase)
+}

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithStdlibCodegenTestGenerated.java

@@ -3381,6 +3381,12 @@ public class BlackBoxWithStdlibCodegenTestGenerated extends AbstractBlackBoxCode
                 JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/boxWithStdlib/reflection/functions"), Pattern.compile("^(.+)\\.kt$"), true);
             }
 
+            @TestMetadata("functionFromStdlib.kt")
+            public void testFunctionFromStdlib() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithStdlib/reflection/functions/functionFromStdlib.kt");
+                doTestWithStdlib(fileName);
+            }
+
             @TestMetadata("localFunctionName.kt")
             public void testLocalFunctionName() throws Exception {
                 String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithStdlib/reflection/functions/localFunctionName.kt");