Fixed completion for safe call

compiler/frontend.java/src/org/jetbrains/kotlin/synthetic/SyntheticExtensionsScope.kt

@@ -31,6 +31,7 @@ import org.jetbrains.kotlin.resolve.lazy.FileScopeProvider
 import org.jetbrains.kotlin.resolve.scopes.JetScope
 import org.jetbrains.kotlin.storage.StorageManager
 import org.jetbrains.kotlin.types.JetType
+import org.jetbrains.kotlin.types.typeUtil.makeNotNullable
 import org.jetbrains.kotlin.utils.addIfNotNull
 import java.util.*
 
@@ -76,7 +77,7 @@ class SyntheticExtensionsScope(storageManager: StorageManager) : JetScope by Jet
     override fun getSyntheticExtensionProperties(receiverType: JetType, name: Name): Collection<VariableDescriptor> {
         if (name.isSpecial()) return emptyList()
         if (name.getIdentifier()[0].isUpperCase()) return emptyList()
-        return collectSyntheticPropertiesByName(null, receiverType, name) ?: emptyList()
+        return collectSyntheticPropertiesByName(null, receiverType.makeNotNullable(), name) ?: emptyList()
     }
 
     private fun collectSyntheticPropertiesByName(result: SmartList<PropertyDescriptor>?, type: JetType, name: Name): SmartList<PropertyDescriptor>? {
@@ -96,7 +97,7 @@ class SyntheticExtensionsScope(storageManager: StorageManager) : JetScope by Jet
 
     override fun getSyntheticExtensionProperties(receiverType: JetType): Collection<VariableDescriptor> {
         val result = ArrayList<PropertyDescriptor>()
-        result.collectSyntheticProperties(receiverType)
+        result.collectSyntheticProperties(receiverType.makeNotNullable())
         return result
     }
 

idea/idea-completion/testData/basic/common/extensions/SyntheticExtensionsSafeCall.kt

@@ -0,0 +1,7 @@
+import java.io.File
+
+fun foo(file: File?) {
+    file?.<caret>
+}
+
+// EXIST_JAVA_ONLY: { lookupString: "absolutePath", itemText: "absolutePath", tailText: " for File", typeText: "String!" }

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JSBasicCompletionTestGenerated.java

@@ -1221,6 +1221,12 @@ public class JSBasicCompletionTestGenerated extends AbstractJSBasicCompletionTes
                 doTest(fileName);
             }
 
+            @TestMetadata("SyntheticExtensionsSafeCall.kt")
+            public void testSyntheticExtensionsSafeCall() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/extensions/SyntheticExtensionsSafeCall.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("WrongExplicitReceiver.kt")
             public void testWrongExplicitReceiver() throws Exception {
                 String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/extensions/WrongExplicitReceiver.kt");

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/JvmBasicCompletionTestGenerated.java

@@ -1221,6 +1221,12 @@ public class JvmBasicCompletionTestGenerated extends AbstractJvmBasicCompletionT
                 doTest(fileName);
             }
 
+            @TestMetadata("SyntheticExtensionsSafeCall.kt")
+            public void testSyntheticExtensionsSafeCall() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/extensions/SyntheticExtensionsSafeCall.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("WrongExplicitReceiver.kt")
             public void testWrongExplicitReceiver() throws Exception {
                 String fileName = JetTestUtils.navigationMetadata("idea/idea-completion/testData/basic/common/extensions/WrongExplicitReceiver.kt");