diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/inline/AnonymousObjectTransformer.kt b/compiler/backend/src/org/jetbrains/kotlin/codegen/inline/AnonymousObjectTransformer.kt
index e1f3d2d917d..77fb95729f8 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/inline/AnonymousObjectTransformer.kt
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/inline/AnonymousObjectTransformer.kt
@@ -90,7 +90,10 @@ class AnonymousObjectTransformer(
                 val node = MethodNode(access, name, desc, signature, exceptions)
                 if (name == "<init>") {
                     if (constructor != null) {
-                        throw RuntimeException("Lambda, SAM or anonymous object should have only one constructor")
+                        throw RuntimeException(
+                            "Lambda, SAM or anonymous object should have only one constructor.\n" +
+                                    "First:\n${constructor.nodeText}\n\nSecond:\n${node.nodeText}\n"
+                        )
                     }
                     constructor = node
                 } else {
diff --git a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxInlineCodegenTestGenerated.java b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxInlineCodegenTestGenerated.java
index 3e8f3abdd24..1bee3c1f65a 100644
--- a/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxInlineCodegenTestGenerated.java
+++ b/compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxInlineCodegenTestGenerated.java
@@ -2244,6 +2244,12 @@ public class FirBlackBoxInlineCodegenTestGenerated extends AbstractFirBlackBoxIn
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxInline/inlineClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
         }
 
+        @Test
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt");
+        }
+
         @Test
         @TestMetadata("inlineClassWithInlineValReturningInlineClass.kt")
         public void testInlineClassWithInlineValReturningInlineClass() throws Exception {
diff --git a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/SyntheticAccessorLowering.kt b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/SyntheticAccessorLowering.kt
index a3cb675b7c4..973a1a77445 100644
--- a/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/SyntheticAccessorLowering.kt
+++ b/compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/SyntheticAccessorLowering.kt
@@ -229,8 +229,9 @@ internal class SyntheticAccessorLowering(val context: JvmBackendContext) : IrEle
 
             val constructedClass = constructedClass
 
-            if (!DescriptorVisibilities.isPrivate(visibility) && !constructedClass.isInline && hasMangledParameters)
-                return true
+            if (!DescriptorVisibilities.isPrivate(visibility) && !constructedClass.isInline && hasMangledParameters &&
+                !constructedClass.isAnonymousObject
+            ) return true
 
             if (visibility != DescriptorVisibilities.PUBLIC && constructedClass.modality == Modality.SEALED)
                 return true
diff --git a/compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt b/compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt
new file mode 100644
index 00000000000..b1d2e56b616
--- /dev/null
+++ b/compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt
@@ -0,0 +1,16 @@
+// NO_CHECK_LAMBDA_INLINING
+// FILE: 1.kt
+
+package test
+
+inline class IC(val value: Any)
+
+inline fun <reified T> f(a: IC): () -> T = {
+    a.value as T
+}
+
+// FILE: 2.kt
+
+import test.*
+
+fun box(): String = f<String>(IC("OK"))()
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxInlineCodegenTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxInlineCodegenTestGenerated.java
index 4bbf6aaa6cf..e58203d76d6 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxInlineCodegenTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/BlackBoxInlineCodegenTestGenerated.java
@@ -2244,6 +2244,12 @@ public class BlackBoxInlineCodegenTestGenerated extends AbstractBlackBoxInlineCo
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxInline/inlineClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM, true);
         }
 
+        @Test
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt");
+        }
+
         @Test
         @TestMetadata("inlineClassWithInlineValReturningInlineClass.kt")
         public void testInlineClassWithInlineValReturningInlineClass() throws Exception {
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/CompileKotlinAgainstInlineKotlinTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/CompileKotlinAgainstInlineKotlinTestGenerated.java
index cd25eee936b..9470fe0531e 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/CompileKotlinAgainstInlineKotlinTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/CompileKotlinAgainstInlineKotlinTestGenerated.java
@@ -2244,6 +2244,12 @@ public class CompileKotlinAgainstInlineKotlinTestGenerated extends AbstractCompi
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxInline/inlineClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM, true);
         }
 
+        @Test
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt");
+        }
+
         @Test
         @TestMetadata("inlineClassWithInlineValReturningInlineClass.kt")
         public void testInlineClassWithInlineValReturningInlineClass() throws Exception {
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxInlineCodegenTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxInlineCodegenTestGenerated.java
index 8489888393a..9fb6095ddf9 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxInlineCodegenTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrBlackBoxInlineCodegenTestGenerated.java
@@ -2244,6 +2244,12 @@ public class IrBlackBoxInlineCodegenTestGenerated extends AbstractIrBlackBoxInli
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxInline/inlineClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
         }
 
+        @Test
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt");
+        }
+
         @Test
         @TestMetadata("inlineClassWithInlineValReturningInlineClass.kt")
         public void testInlineClassWithInlineValReturningInlineClass() throws Exception {
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrCompileKotlinAgainstInlineKotlinTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrCompileKotlinAgainstInlineKotlinTestGenerated.java
index d1a19baf1e7..55e41322306 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrCompileKotlinAgainstInlineKotlinTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/IrCompileKotlinAgainstInlineKotlinTestGenerated.java
@@ -2244,6 +2244,12 @@ public class IrCompileKotlinAgainstInlineKotlinTestGenerated extends AbstractIrC
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxInline/inlineClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_IR, true);
         }
 
+        @Test
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt");
+        }
+
         @Test
         @TestMetadata("inlineClassWithInlineValReturningInlineClass.kt")
         public void testInlineClassWithInlineValReturningInlineClass() throws Exception {
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/JvmIrAgainstOldBoxInlineTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/JvmIrAgainstOldBoxInlineTestGenerated.java
index ce4ed6b602c..e42ec5e9820 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/JvmIrAgainstOldBoxInlineTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/JvmIrAgainstOldBoxInlineTestGenerated.java
@@ -2244,6 +2244,12 @@ public class JvmIrAgainstOldBoxInlineTestGenerated extends AbstractJvmIrAgainstO
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxInline/inlineClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_MULTI_MODULE_IR_AGAINST_OLD, true);
         }
 
+        @Test
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt");
+        }
+
         @Test
         @TestMetadata("inlineClassWithInlineValReturningInlineClass.kt")
         public void testInlineClassWithInlineValReturningInlineClass() throws Exception {
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/JvmOldAgainstIrBoxInlineTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/JvmOldAgainstIrBoxInlineTestGenerated.java
index 3b646a4262f..6f7e9d3cc2b 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/JvmOldAgainstIrBoxInlineTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/codegen/JvmOldAgainstIrBoxInlineTestGenerated.java
@@ -2244,6 +2244,12 @@ public class JvmOldAgainstIrBoxInlineTestGenerated extends AbstractJvmOldAgainst
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxInline/inlineClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JVM_MULTI_MODULE_OLD_AGAINST_IR, true);
         }
 
+        @Test
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt");
+        }
+
         @Test
         @TestMetadata("inlineClassWithInlineValReturningInlineClass.kt")
         public void testInlineClassWithInlineValReturningInlineClass() throws Exception {
diff --git a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenInlineES6TestGenerated.java b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenInlineES6TestGenerated.java
index 47fd9bacfb7..41bff6fe402 100644
--- a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenInlineES6TestGenerated.java
+++ b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/es6/semantics/IrJsCodegenInlineES6TestGenerated.java
@@ -1795,6 +1795,11 @@ public class IrJsCodegenInlineES6TestGenerated extends AbstractIrJsCodegenInline
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxInline/inlineClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR_ES6, true);
         }
 
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt");
+        }
+
         @TestMetadata("inlineClassWithInlineValReturningInlineClass.kt")
         public void testInlineClassWithInlineValReturningInlineClass() throws Exception {
             runTest("compiler/testData/codegen/boxInline/inlineClasses/inlineClassWithInlineValReturningInlineClass.kt");
diff --git a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenInlineTestGenerated.java b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenInlineTestGenerated.java
index 022c5e3c219..5d7d9b55532 100644
--- a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenInlineTestGenerated.java
+++ b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrJsCodegenInlineTestGenerated.java
@@ -1795,6 +1795,11 @@ public class IrJsCodegenInlineTestGenerated extends AbstractIrJsCodegenInlineTes
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxInline/inlineClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
         }
 
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt");
+        }
+
         @TestMetadata("inlineClassWithInlineValReturningInlineClass.kt")
         public void testInlineClassWithInlineValReturningInlineClass() throws Exception {
             runTest("compiler/testData/codegen/boxInline/inlineClasses/inlineClassWithInlineValReturningInlineClass.kt");
diff --git a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/semantics/JsCodegenInlineTestGenerated.java b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/semantics/JsCodegenInlineTestGenerated.java
index c6ceb1eb10d..9e8111be9fa 100644
--- a/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/semantics/JsCodegenInlineTestGenerated.java
+++ b/js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/semantics/JsCodegenInlineTestGenerated.java
@@ -1795,6 +1795,11 @@ public class JsCodegenInlineTestGenerated extends AbstractJsCodegenInlineTest {
             KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxInline/inlineClasses"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS, true);
         }
 
+        @TestMetadata("anonymousObject.kt")
+        public void testAnonymousObject() throws Exception {
+            runTest("compiler/testData/codegen/boxInline/inlineClasses/anonymousObject.kt");
+        }
+
         @TestMetadata("inlineClassWithInlineValReturningInlineClass.kt")
         public void testInlineClassWithInlineValReturningInlineClass() throws Exception {
             runTest("compiler/testData/codegen/boxInline/inlineClasses/inlineClassWithInlineValReturningInlineClass.kt");