Bug fix: DataFlowInfo.getCompleteTypeInfo (with a test)

compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/smartcasts/DelegatingDataFlowInfo.java

@@ -100,8 +100,8 @@ import static org.jetbrains.kotlin.resolve.calls.smartcasts.Nullability.NOT_NULL
                     result.putAll(key, info.typeInfo.get(key));
                 }
             }
-            if (valueWithGivenTypeInfo != null) {
+            if (info.valueWithGivenTypeInfo != null) {
-                withGivenTypeInfo.add(valueWithGivenTypeInfo);
+                withGivenTypeInfo.add(info.valueWithGivenTypeInfo);
             }
             info = (DelegatingDataFlowInfo) info.parent;
         }

compiler/testData/diagnostics/tests/smartCasts/varnotnull/assignNestedWhile.kt

@@ -0,0 +1,28 @@
+class Bar {
+    fun next(): Bar? {
+        if (2 == 4)
+            return this
+        else
+            return null
+    }
+}
+
+fun foo(): Bar {
+    var x: Bar? = Bar()
+    var y: Bar?
+    y = Bar()
+    while (x != null) {
+        // Here call is unsafe because of inner loop
+        y<!UNSAFE_CALL!>.<!>next()
+        while (y != null) {
+            if (x == y)
+                // x is not null because of outer while
+                return <!DEBUG_INFO_SMARTCAST!>x<!>
+            // y is not null because of inner while
+            y = <!DEBUG_INFO_SMARTCAST!>y<!>.next()
+        }
+        // x is not null because of outer while
+        x = <!DEBUG_INFO_SMARTCAST!>x<!>.next()
+    }
+    return Bar()
+}

compiler/testData/diagnostics/tests/smartCasts/varnotnull/assignNestedWhile.txt

@@ -0,0 +1,11 @@
+package
+
+internal fun foo(): Bar
+
+internal final class Bar {
+    public constructor Bar()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    internal final fun next(): Bar?
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/tests/org/jetbrains/kotlin/checkers/JetDiagnosticsTestGenerated.java

@@ -11741,6 +11741,12 @@ public class JetDiagnosticsTestGenerated extends AbstractJetDiagnosticsTest {
                     JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/diagnostics/tests/smartCasts/varnotnull"), Pattern.compile("^(.+)\\.kt$"), true);
                 }
 
+                @TestMetadata("assignNestedWhile.kt")
+                public void testAssignNestedWhile() throws Exception {
+                    String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/smartCasts/varnotnull/assignNestedWhile.kt");
+                    doTest(fileName);
+                }
+
                 @TestMetadata("assignment.kt")
                 public void testAssignment() throws Exception {
                     String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/smartCasts/varnotnull/assignment.kt");