diff --git a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java
index 89f36f464db..ae6c188af14 100644
--- a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java
+++ b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java
@@ -591,6 +591,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
             runTest("compiler/testData/diagnostics/tests/IsExpressions.kt");
         }
 
+        @Test
+        @TestMetadata("k2IrParentIssue.kt")
+        public void testK2IrParentIssue() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/k2IrParentIssue.kt");
+        }
+
         @Test
         @TestMetadata("kt11167.kt")
         public void testKt11167() throws Exception {
diff --git a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java
index f634140cd61..97d9688202a 100644
--- a/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java
+++ b/analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java
@@ -591,6 +591,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
             runTest("compiler/testData/diagnostics/tests/IsExpressions.kt");
         }
 
+        @Test
+        @TestMetadata("k2IrParentIssue.kt")
+        public void testK2IrParentIssue() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/k2IrParentIssue.kt");
+        }
+
         @Test
         @TestMetadata("kt11167.kt")
         public void testKt11167() throws Exception {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeOldFrontendDiagnosticsTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeOldFrontendDiagnosticsTestGenerated.java
index 4c66bae8631..84bf1261d06 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeOldFrontendDiagnosticsTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirLightTreeOldFrontendDiagnosticsTestGenerated.java
@@ -591,6 +591,12 @@ public class FirLightTreeOldFrontendDiagnosticsTestGenerated extends AbstractFir
             runTest("compiler/testData/diagnostics/tests/IsExpressions.kt");
         }
 
+        @Test
+        @TestMetadata("k2IrParentIssue.kt")
+        public void testK2IrParentIssue() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/k2IrParentIssue.kt");
+        }
+
         @Test
         @TestMetadata("kt11167.kt")
         public void testKt11167() throws Exception {
diff --git a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiOldFrontendDiagnosticsTestGenerated.java b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiOldFrontendDiagnosticsTestGenerated.java
index be3290e3670..b63aafd727d 100644
--- a/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiOldFrontendDiagnosticsTestGenerated.java
+++ b/compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirPsiOldFrontendDiagnosticsTestGenerated.java
@@ -591,6 +591,12 @@ public class FirPsiOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiDia
             runTest("compiler/testData/diagnostics/tests/IsExpressions.kt");
         }
 
+        @Test
+        @TestMetadata("k2IrParentIssue.kt")
+        public void testK2IrParentIssue() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/k2IrParentIssue.kt");
+        }
+
         @Test
         @TestMetadata("kt11167.kt")
         public void testKt11167() throws Exception {
diff --git a/compiler/testData/diagnostics/tests/k2IrParentIssue.kt b/compiler/testData/diagnostics/tests/k2IrParentIssue.kt
new file mode 100644
index 00000000000..25433d0ca48
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/k2IrParentIssue.kt
@@ -0,0 +1,16 @@
+// FIR_IDENTICAL
+// ISSUE: KT-64089
+
+fun <T> contentReturner(f: () -> T): T {
+    return null <!UNCHECKED_CAST!>as T<!>
+}
+
+fun main(number: Int? = null) {
+    contentReturner {
+        "".apply {
+            number!!
+        }
+    }
+
+    number != null
+}
diff --git a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
index 054e0f35a72..87b1bf19489 100644
--- a/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
+++ b/compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java
@@ -591,6 +591,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
             runTest("compiler/testData/diagnostics/tests/IsExpressions.kt");
         }
 
+        @Test
+        @TestMetadata("k2IrParentIssue.kt")
+        public void testK2IrParentIssue() throws Exception {
+            runTest("compiler/testData/diagnostics/tests/k2IrParentIssue.kt");
+        }
+
         @Test
         @TestMetadata("kt11167.kt")
         public void testKt11167() throws Exception {