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 3955f3c2b71..6ade9fd9abe 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
@@ -40952,6 +40952,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
                 runTest("compiler/testData/diagnostics/tests/visibility/privateToThisExotic.kt");
             }
 
+            @Test
+            @TestMetadata("privateToThisK1Crash.kt")
+            public void testPrivateToThisK1Crash() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.kt");
+            }
+
             @Test
             @TestMetadata("protectedInternal.kt")
             public void testProtectedInternal() 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 d9288d5a53c..f3225c68465 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
@@ -40952,6 +40952,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
                 runTest("compiler/testData/diagnostics/tests/visibility/privateToThisExotic.kt");
             }
 
+            @Test
+            @TestMetadata("privateToThisK1Crash.kt")
+            public void testPrivateToThisK1Crash() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.kt");
+            }
+
             @Test
             @TestMetadata("protectedInternal.kt")
             public void testProtectedInternal() 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 0f4b876d9e7..2048fe239d1 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
@@ -38578,6 +38578,12 @@ public class FirLightTreeOldFrontendDiagnosticsTestGenerated extends AbstractFir
                 runTest("compiler/testData/diagnostics/tests/visibility/privateToThisExotic.kt");
             }
 
+            @Test
+            @TestMetadata("privateToThisK1Crash.kt")
+            public void testPrivateToThisK1Crash() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.kt");
+            }
+
             @Test
             @TestMetadata("protectedInternal.kt")
             public void testProtectedInternal() 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 9828c0331b8..291eebf9745 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
@@ -38704,6 +38704,12 @@ public class FirPsiOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiDia
                 runTest("compiler/testData/diagnostics/tests/visibility/privateToThisExotic.kt");
             }
 
+            @Test
+            @TestMetadata("privateToThisK1Crash.kt")
+            public void testPrivateToThisK1Crash() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.kt");
+            }
+
             @Test
             @TestMetadata("protectedInternal.kt")
             public void testProtectedInternal() throws Exception {
diff --git a/compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.fail b/compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.fail
new file mode 100644
index 00000000000..943621ca03a
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.fail
@@ -0,0 +1 @@
+org.jetbrains.kotlin.util.ReenteringLazyValueComputationException
diff --git a/compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.kt b/compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.kt
new file mode 100644
index 00000000000..07836baeaf4
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.kt
@@ -0,0 +1,14 @@
+// FIR_IDENTICAL
+// ISSUE: KT-55446
+val Any?.tt: String
+    get() = ""
+
+open class Base<in T>(t: T) {
+    private val tt = t.also { foo(null!!) }
+
+    fun foo(a: Derived<String>) = run {
+        val x: String = a.tt
+    }
+}
+
+class Derived<in T>(t: T) : Base<T>(t)
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 3c4f96eb905..22ca393f72e 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
@@ -40952,6 +40952,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                 runTest("compiler/testData/diagnostics/tests/visibility/privateToThisExotic.kt");
             }
 
+            @Test
+            @TestMetadata("privateToThisK1Crash.kt")
+            public void testPrivateToThisK1Crash() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/visibility/privateToThisK1Crash.kt");
+            }
+
             @Test
             @TestMetadata("protectedInternal.kt")
             public void testProtectedInternal() throws Exception {