Saving and loading projection kind of array element type in bytecode.

compiler/backend/src/org/jetbrains/jet/codegen/signature/BothSignatureWriter.java

@@ -166,7 +166,7 @@ public class BothSignatureWriter {
                 writeClassEnd();
                 return;
             case Type.ARRAY:
-                writeArrayType(nullable);
+                writeArrayType(nullable, Variance.INVARIANT);
                 writeAsmType(asmType.getElementType(), false, kotlinTypeName);
                 writeArrayEnd();
                 return;
@@ -235,9 +235,9 @@ public class BothSignatureWriter {
         jetSignatureWriter.visitEnd();
     }
 
-    public void writeArrayType(boolean nullable) {
+    public void writeArrayType(boolean nullable, Variance projectionKind) {
         push(signatureVisitor().visitArrayType());
-        jetSignatureWriter.visitArrayType(nullable);
+        jetSignatureWriter.visitArrayType(nullable, toJetSignatureVariance(projectionKind));
         if (jvmCurrentType == null) {
             ++jvmCurrentTypeArrayLevel;
         }

compiler/backend/src/org/jetbrains/jet/codegen/state/JetTypeMapper.java

@@ -266,10 +266,11 @@ public class JetTypeMapper extends BindingTraceAware {
             if (jetType.getArguments().size() != 1) {
                 throw new UnsupportedOperationException("arrays must have one type argument");
             }
-            JetType memberType = jetType.getArguments().get(0).getType();
+            TypeProjection memberProjection = jetType.getArguments().get(0);
+            JetType memberType = memberProjection.getType();
 
             if (signatureVisitor != null) {
-                signatureVisitor.writeArrayType(jetType.isNullable());
+                signatureVisitor.writeArrayType(jetType.isNullable(), memberProjection.getProjectionKind());
                 mapType(memberType, signatureVisitor, JetTypeMapperMode.TYPE_PARAMETER);
                 signatureVisitor.writeArrayEnd();
             }

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/JetTypeJetSignatureReader.java

@@ -161,7 +161,7 @@ public abstract class JetTypeJetSignatureReader extends JetSignatureExceptionsAd
     }
 
     @Override
-    public JetSignatureVisitor visitArrayType(final boolean nullable) {
+    public JetSignatureVisitor visitArrayType(final boolean nullable, final JetSignatureVariance wildcard) {
         return new JetTypeJetSignatureReader(javaSemanticServices, kotlinBuiltIns, typeVariableResolver) {
             @Override
             public void visitBaseType(char descriptor, boolean nullable) {
@@ -178,7 +178,8 @@ public abstract class JetTypeJetSignatureReader extends JetSignatureExceptionsAd
 
             @Override
             protected void done(@NotNull JetType jetType) {
-                JetType arrayType = TypeUtils.makeNullableAsSpecified(KotlinBuiltIns.getInstance().getArrayType(jetType), nullable);
+                JetType arrayType = TypeUtils.makeNullableAsSpecified(KotlinBuiltIns.getInstance().getArrayType(
+                        parseVariance(wildcard), jetType), nullable);
                 JetTypeJetSignatureReader.this.done(arrayType);
             }
         };

compiler/testData/loadKotlin/type/ArrayOfInNumber.kt

@@ -0,0 +1,3 @@
+package test
+
+fun nothing(): Array<in Number> = throw Exception()

compiler/testData/loadKotlin/type/ArrayOfInNumber.txt

@@ -0,0 +1,3 @@
+namespace test
+
+internal final fun nothing(): jet.Array<in jet.Number>

compiler/testData/loadKotlin/type/ArrayOfOutNumber.kt

@@ -0,0 +1,3 @@
+package test
+
+fun nothing(): Array<out Number> = throw Exception()

compiler/testData/loadKotlin/type/ArrayOfOutNumber.txt

@@ -0,0 +1,3 @@
+namespace test
+
+internal final fun nothing(): jet.Array<out jet.Number>

compiler/testData/loadKotlin/type/ArrayOfOutT.kt

@@ -0,0 +1,3 @@
+package test
+
+fun <T> nothing(): Array<out T> = throw Exception()

compiler/testData/loadKotlin/type/ArrayOfOutT.txt

@@ -0,0 +1,3 @@
+namespace test
+
+internal final fun </*0*/ T : jet.Any?>nothing(): jet.Array<out T>

compiler/tests/org/jetbrains/jet/jvm/compiler/LoadCompiledKotlinTestGenerated.java

@@ -724,6 +724,11 @@ public class LoadCompiledKotlinTestGenerated extends AbstractLoadCompiledKotlinT
             doTest("compiler/testData/loadKotlin/type/AnyQ.kt");
         }
         
+        @TestMetadata("ArrayOfInNumber.kt")
+        public void testArrayOfInNumber() throws Exception {
+            doTest("compiler/testData/loadKotlin/type/ArrayOfInNumber.kt");
+        }
+        
         @TestMetadata("ArrayOfInt.kt")
         public void testArrayOfInt() throws Exception {
             doTest("compiler/testData/loadKotlin/type/ArrayOfInt.kt");
@@ -734,6 +739,16 @@ public class LoadCompiledKotlinTestGenerated extends AbstractLoadCompiledKotlinT
             doTest("compiler/testData/loadKotlin/type/ArrayOfInteger.kt");
         }
         
+        @TestMetadata("ArrayOfOutNumber.kt")
+        public void testArrayOfOutNumber() throws Exception {
+            doTest("compiler/testData/loadKotlin/type/ArrayOfOutNumber.kt");
+        }
+        
+        @TestMetadata("ArrayOfOutT.kt")
+        public void testArrayOfOutT() throws Exception {
+            doTest("compiler/testData/loadKotlin/type/ArrayOfOutT.kt");
+        }
+        
         @TestMetadata("ArrayOfString.kt")
         public void testArrayOfString() throws Exception {
             doTest("compiler/testData/loadKotlin/type/ArrayOfString.kt");

compiler/tests/org/jetbrains/jet/lang/resolve/lazy/LazyResolveNamespaceComparingTestGenerated.java

@@ -726,6 +726,11 @@ public class LazyResolveNamespaceComparingTestGenerated extends AbstractLazyReso
                 doTestSinglePackage("compiler/testData/loadKotlin/type/AnyQ.kt");
             }
             
+            @TestMetadata("ArrayOfInNumber.kt")
+            public void testArrayOfInNumber() throws Exception {
+                doTestSinglePackage("compiler/testData/loadKotlin/type/ArrayOfInNumber.kt");
+            }
+            
             @TestMetadata("ArrayOfInt.kt")
             public void testArrayOfInt() throws Exception {
                 doTestSinglePackage("compiler/testData/loadKotlin/type/ArrayOfInt.kt");
@@ -736,6 +741,16 @@ public class LazyResolveNamespaceComparingTestGenerated extends AbstractLazyReso
                 doTestSinglePackage("compiler/testData/loadKotlin/type/ArrayOfInteger.kt");
             }
             
+            @TestMetadata("ArrayOfOutNumber.kt")
+            public void testArrayOfOutNumber() throws Exception {
+                doTestSinglePackage("compiler/testData/loadKotlin/type/ArrayOfOutNumber.kt");
+            }
+            
+            @TestMetadata("ArrayOfOutT.kt")
+            public void testArrayOfOutT() throws Exception {
+                doTestSinglePackage("compiler/testData/loadKotlin/type/ArrayOfOutT.kt");
+            }
+            
             @TestMetadata("ArrayOfString.kt")
             public void testArrayOfString() throws Exception {
                 doTestSinglePackage("compiler/testData/loadKotlin/type/ArrayOfString.kt");