analyze when entry in independent context

compiler/frontend/src/org/jetbrains/jet/lang/types/expressions/PatternMatchingTypingVisitor.java

@@ -129,9 +129,11 @@ public class PatternMatchingTypingVisitor extends ExpressionTypingVisitor {
             }
             JetExpression bodyExpression = whenEntry.getExpression();
             if (bodyExpression != null) {
-                ExpressionTypingContext newContext = contextWithExpectedType.replaceScope(scopeToExtend).replaceDataFlowInfo(newDataFlowInfo);
+                ExpressionTypingContext newContext = contextWithExpectedType
+                        .replaceScope(scopeToExtend).replaceDataFlowInfo(newDataFlowInfo).replaceContextDependency(INDEPENDENT);
                 CoercionStrategy coercionStrategy = isStatement ? CoercionStrategy.COERCION_TO_UNIT : CoercionStrategy.NO_COERCION;
-                JetTypeInfo typeInfo = context.expressionTypingServices.getBlockReturnedTypeWithWritableScope(scopeToExtend, Collections.singletonList(bodyExpression), coercionStrategy, newContext, context.trace);
+                JetTypeInfo typeInfo = context.expressionTypingServices.getBlockReturnedTypeWithWritableScope(
+                        scopeToExtend, Collections.singletonList(bodyExpression), coercionStrategy, newContext, context.trace);
                 JetType type = typeInfo.getType();
                 if (type != null) {
                     expressionTypes.add(type);

compiler/testData/codegen/box/constants/constantsInWhen.kt

@@ -0,0 +1,18 @@
+fun test(
+        b: Boolean,
+        i: Int
+) {
+    if (b) {
+        when (i) {
+            0 -> foo(1)
+            else -> null
+        }
+    } else null
+}
+
+fun foo(i: Int) = i
+
+fun box(): String {
+    test(true, 1)
+    return "OK"
+}

compiler/tests/org/jetbrains/jet/codegen/generated/BlackBoxCodegenTestGenerated.java

@@ -31,7 +31,7 @@ import org.jetbrains.jet.codegen.generated.AbstractBlackBoxCodegenTest;
 /** This class is generated by {@link org.jetbrains.jet.generators.tests.GenerateTests}. DO NOT MODIFY MANUALLY */
 @SuppressWarnings("all")
 @TestMetadata("compiler/testData/codegen/box")
-@InnerTestClasses({BlackBoxCodegenTestGenerated.Arrays.class, BlackBoxCodegenTestGenerated.Bridges.class, BlackBoxCodegenTestGenerated.CallableReference.class, BlackBoxCodegenTestGenerated.Casts.class, BlackBoxCodegenTestGenerated.Classes.class, BlackBoxCodegenTestGenerated.Closures.class, BlackBoxCodegenTestGenerated.ControlStructures.class, BlackBoxCodegenTestGenerated.DefaultArguments.class, BlackBoxCodegenTestGenerated.DelegatedProperty.class, BlackBoxCodegenTestGenerated.Elvis.class, BlackBoxCodegenTestGenerated.Enum.class, BlackBoxCodegenTestGenerated.ExclExcl.class, BlackBoxCodegenTestGenerated.ExtensionFunctions.class, BlackBoxCodegenTestGenerated.ExtensionProperties.class, BlackBoxCodegenTestGenerated.FieldRename.class, BlackBoxCodegenTestGenerated.Finally.class, BlackBoxCodegenTestGenerated.Functions.class, BlackBoxCodegenTestGenerated.InnerNested.class, BlackBoxCodegenTestGenerated.Instructions.class, BlackBoxCodegenTestGenerated.Intrinsics.class, BlackBoxCodegenTestGenerated.Labels.class, BlackBoxCodegenTestGenerated.LocalClasses.class, BlackBoxCodegenTestGenerated.MultiDecl.class, BlackBoxCodegenTestGenerated.Namespace.class, BlackBoxCodegenTestGenerated.Objects.class, BlackBoxCodegenTestGenerated.OperatorConventions.class, BlackBoxCodegenTestGenerated.PrimitiveTypes.class, BlackBoxCodegenTestGenerated.Properties.class, BlackBoxCodegenTestGenerated.Reflection.class, BlackBoxCodegenTestGenerated.SafeCall.class, BlackBoxCodegenTestGenerated.SamConstructors.class, BlackBoxCodegenTestGenerated.Strings.class, BlackBoxCodegenTestGenerated.Super.class, BlackBoxCodegenTestGenerated.Traits.class, BlackBoxCodegenTestGenerated.TypeInfo.class, BlackBoxCodegenTestGenerated.Unit.class, BlackBoxCodegenTestGenerated.Vararg.class, BlackBoxCodegenTestGenerated.When.class})
+@InnerTestClasses({BlackBoxCodegenTestGenerated.Arrays.class, BlackBoxCodegenTestGenerated.Bridges.class, BlackBoxCodegenTestGenerated.CallableReference.class, BlackBoxCodegenTestGenerated.Casts.class, BlackBoxCodegenTestGenerated.Classes.class, BlackBoxCodegenTestGenerated.Closures.class, BlackBoxCodegenTestGenerated.Constants.class, BlackBoxCodegenTestGenerated.ControlStructures.class, BlackBoxCodegenTestGenerated.DefaultArguments.class, BlackBoxCodegenTestGenerated.DelegatedProperty.class, BlackBoxCodegenTestGenerated.Elvis.class, BlackBoxCodegenTestGenerated.Enum.class, BlackBoxCodegenTestGenerated.ExclExcl.class, BlackBoxCodegenTestGenerated.ExtensionFunctions.class, BlackBoxCodegenTestGenerated.ExtensionProperties.class, BlackBoxCodegenTestGenerated.FieldRename.class, BlackBoxCodegenTestGenerated.Finally.class, BlackBoxCodegenTestGenerated.Functions.class, BlackBoxCodegenTestGenerated.InnerNested.class, BlackBoxCodegenTestGenerated.Instructions.class, BlackBoxCodegenTestGenerated.Intrinsics.class, BlackBoxCodegenTestGenerated.Labels.class, BlackBoxCodegenTestGenerated.LocalClasses.class, BlackBoxCodegenTestGenerated.MultiDecl.class, BlackBoxCodegenTestGenerated.Namespace.class, BlackBoxCodegenTestGenerated.Objects.class, BlackBoxCodegenTestGenerated.OperatorConventions.class, BlackBoxCodegenTestGenerated.PrimitiveTypes.class, BlackBoxCodegenTestGenerated.Properties.class, BlackBoxCodegenTestGenerated.Reflection.class, BlackBoxCodegenTestGenerated.SafeCall.class, BlackBoxCodegenTestGenerated.SamConstructors.class, BlackBoxCodegenTestGenerated.Strings.class, BlackBoxCodegenTestGenerated.Super.class, BlackBoxCodegenTestGenerated.Traits.class, BlackBoxCodegenTestGenerated.TypeInfo.class, BlackBoxCodegenTestGenerated.Unit.class, BlackBoxCodegenTestGenerated.Vararg.class, BlackBoxCodegenTestGenerated.When.class})
 public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
     public void testAllFilesPresentInBox() throws Exception {
         JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), "org.jetbrains.jet.generators.tests.GenerateTests", new File("compiler/testData/codegen/box"), Pattern.compile("^(.+)\\.kt$"), true);
@@ -1265,6 +1265,19 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
         }
     }
     
+    @TestMetadata("compiler/testData/codegen/box/constants")
+    public static class Constants extends AbstractBlackBoxCodegenTest {
+        public void testAllFilesPresentInConstants() throws Exception {
+            JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), "org.jetbrains.jet.generators.tests.GenerateTests", new File("compiler/testData/codegen/box/constants"), Pattern.compile("^(.+)\\.kt$"), true);
+        }
+        
+        @TestMetadata("constantsInWhen.kt")
+        public void testConstantsInWhen() throws Exception {
+            doTest("compiler/testData/codegen/box/constants/constantsInWhen.kt");
+        }
+        
+    }
+    
     @TestMetadata("compiler/testData/codegen/box/controlStructures")
     public static class ControlStructures extends AbstractBlackBoxCodegenTest {
         public void testAllFilesPresentInControlStructures() throws Exception {
@@ -4265,6 +4278,7 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
         suite.addTestSuite(Casts.class);
         suite.addTestSuite(Classes.class);
         suite.addTest(Closures.innerSuite());
+        suite.addTestSuite(Constants.class);
         suite.addTestSuite(ControlStructures.class);
         suite.addTest(DefaultArguments.innerSuite());
         suite.addTestSuite(DelegatedProperty.class);