Add test for KT-49209

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -29034,6 +29034,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             runTest("compiler/testData/codegen/box/platformTypes/kt47785.kt");
         }
 
+        @Test
+        @TestMetadata("kt49209.kt")
+        public void testKt49209() throws Exception {
+            runTest("compiler/testData/codegen/box/platformTypes/kt49209.kt");
+        }
+
         @Test
         @TestMetadata("rawTypeWithNestedClass.kt")
         public void testRawTypeWithNestedClass() throws Exception {

compiler/testData/codegen/box/platformTypes/kt49209.kt

@@ -0,0 +1,12 @@
+// TARGET_BACKEND: JVM
+// IGNORE_BACKEND_FIR: JVM_IR
+// JVM_TARGET: 1.8
+// FULL_JDK
+
+import java.util.Optional
+
+fun <T> T?.toOptional(): Optional<T> = Optional.ofNullable(this)
+
+fun box(): String {
+    return "OK".toOptional().get()
+}

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxCodegenTestGenerated.java

@@ -28896,6 +28896,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/platformTypes/kt47785.kt");
         }
 
+        @Test
+        @TestMetadata("kt49209.kt")
+        public void testKt49209() throws Exception {
+            runTest("compiler/testData/codegen/box/platformTypes/kt49209.kt");
+        }
+
         @Test
         @TestMetadata("rawTypeWithNestedClass.kt")
         public void testRawTypeWithNestedClass() throws Exception {

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxCodegenTestGenerated.java

@@ -29034,6 +29034,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/platformTypes/kt47785.kt");
         }
 
+        @Test
+        @TestMetadata("kt49209.kt")
+        public void testKt49209() throws Exception {
+            runTest("compiler/testData/codegen/box/platformTypes/kt49209.kt");
+        }
+
         @Test
         @TestMetadata("rawTypeWithNestedClass.kt")
         public void testRawTypeWithNestedClass() throws Exception {

compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -24545,6 +24545,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/platformTypes/kt47785.kt");
         }
 
+        @TestMetadata("kt49209.kt")
+        public void testKt49209() throws Exception {
+            runTest("compiler/testData/codegen/box/platformTypes/kt49209.kt");
+        }
+
         @TestMetadata("rawTypeWithNestedClass.kt")
         public void testRawTypeWithNestedClass() throws Exception {
             runTest("compiler/testData/codegen/box/platformTypes/rawTypeWithNestedClass.kt");