Minor. Add regression test

#KT-45991

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

@@ -17982,6 +17982,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             runTest("compiler/testData/codegen/box/inlineClasses/kt44867.kt");
         }
 
+        @Test
+        @TestMetadata("kt45991.kt")
+        public void testKt45991() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kt45991.kt");
+        }
+
         @Test
         @TestMetadata("mangledDefaultParameterFunction.kt")
         public void testMangledDefaultParameterFunction() throws Exception {

compiler/testData/codegen/box/inlineClasses/kt45991.kt

@@ -0,0 +1,56 @@
+// WITH_RUNTIME
+// KJS_WITH_FULL_RUNTIME
+// IGNORE_BACKEND: JVM
+// IGNORE_LIGHT_ANALYSIS
+
+var result = ""
+
+fun ex1_(res: Result<Int>) {
+    res.fold(
+        onSuccess = { result += "Ex $it\n" },
+        onFailure = {},
+    )
+}
+
+fun ex1(res: Result<Int>) {
+    res.fold(
+        onSuccess = { ex1_(res) },
+        onFailure = { ex1_(Result.failure(it)) }
+    )
+}
+
+val ex2_: (Result<Int>) -> Unit = { res ->
+    res.fold(
+        onSuccess = { result += "Ex $it\n" },
+        onFailure = {},
+    )
+}
+
+val ex2: (Result<Int>) -> Unit = { res ->
+    res.fold(
+        onSuccess = { ex2_(Result.success(it)) },
+        onFailure = { ex2_(Result.failure(it)) }
+    )
+}
+
+
+val ex3_: (Result<Int>) -> Unit = { res ->
+    res.fold(
+        onSuccess = { result += "Ex $it\n" },
+        onFailure = {},
+    )
+}
+
+val ex3: (Result<Int>) -> Unit = { res ->
+    res.fold(
+        onSuccess = { ex3_(res) },
+        onFailure = { ex3_(Result.failure(it)) }
+    )
+}
+
+fun box(): String {
+    ex1(Result.success(1))
+    ex2(Result.success(2))
+    ex3(Result.success(3))
+    return if (result == "Ex 1\nEx 2\nEx 3\n") "OK" else "FAIL $result"
+}

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

@@ -17964,6 +17964,12 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             runTest("compiler/testData/codegen/box/inlineClasses/kt44867.kt");
         }
 
+        @Test
+        @TestMetadata("kt45991.kt")
+        public void testKt45991() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kt45991.kt");
+        }
+
         @Test
         @TestMetadata("mangledDefaultParameterFunction.kt")
         public void testMangledDefaultParameterFunction() throws Exception {

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

@@ -17982,6 +17982,12 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             runTest("compiler/testData/codegen/box/inlineClasses/kt44867.kt");
         }
 
+        @Test
+        @TestMetadata("kt45991.kt")
+        public void testKt45991() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kt45991.kt");
+        }
+
         @Test
         @TestMetadata("mangledDefaultParameterFunction.kt")
         public void testMangledDefaultParameterFunction() throws Exception {

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

@@ -14253,6 +14253,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/inlineClasses/kt44867.kt");
         }
 
+        @TestMetadata("kt45991.kt")
+        public void ignoreKt45991() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kt45991.kt");
+        }
+
         @TestMetadata("safeAsOfTypeParameterWithInlineClassBound.kt")
         public void ignoreSafeAsOfTypeParameterWithInlineClassBound() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/safeAsOfTypeParameterWithInlineClassBound.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenBoxES6TestGenerated.java

@@ -13085,6 +13085,11 @@ public class IrJsCodegenBoxES6TestGenerated extends AbstractIrJsCodegenBoxES6Tes
             runTest("compiler/testData/codegen/box/inlineClasses/kt44867.kt");
         }
 
+        @TestMetadata("kt45991.kt")
+        public void testKt45991() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kt45991.kt");
+        }
+
         @TestMetadata("mangledDefaultParameterFunction.kt")
         public void testMangledDefaultParameterFunction() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/mangledDefaultParameterFunction.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenBoxTestGenerated.java

@@ -12506,6 +12506,11 @@ public class IrJsCodegenBoxTestGenerated extends AbstractIrJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/inlineClasses/kt44867.kt");
         }
 
+        @TestMetadata("kt45991.kt")
+        public void testKt45991() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kt45991.kt");
+        }
+
         @TestMetadata("mangledDefaultParameterFunction.kt")
         public void testMangledDefaultParameterFunction() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/mangledDefaultParameterFunction.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/semantics/JsCodegenBoxTestGenerated.java

@@ -12571,6 +12571,11 @@ public class JsCodegenBoxTestGenerated extends AbstractJsCodegenBoxTest {
             runTest("compiler/testData/codegen/box/inlineClasses/kt44867.kt");
         }
 
+        @TestMetadata("kt45991.kt")
+        public void testKt45991() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kt45991.kt");
+        }
+
         @TestMetadata("mangledDefaultParameterFunction.kt")
         public void testMangledDefaultParameterFunction() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/mangledDefaultParameterFunction.kt");

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/wasm/semantics/IrCodegenBoxWasmTestGenerated.java

@@ -6812,6 +6812,11 @@ public class IrCodegenBoxWasmTestGenerated extends AbstractIrCodegenBoxWasmTest
             runTest("compiler/testData/codegen/box/inlineClasses/kt44867.kt");
         }
 
+        @TestMetadata("kt45991.kt")
+        public void testKt45991() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kt45991.kt");
+        }
+
         @TestMetadata("mangledDefaultParameterFunction.kt")
         public void testMangledDefaultParameterFunction() throws Exception {
             runTest("compiler/testData/codegen/box/inlineClasses/mangledDefaultParameterFunction.kt");