FIR: Add test for type resolution when referenced nested class from supertypes

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java

@@ -34746,6 +34746,12 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirDiagnosti
             public void testSamOverloadsWithKtFunctionWithoutRefinedSams() throws Exception {
                 runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/samOverloadsWithKtFunctionWithoutRefinedSams.kt");
             }
+
+            @Test
+            @TestMetadata("sameNameClassesFromSupertypes.kt")
+            public void testSameNameClassesFromSupertypes() throws Exception {
+                runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/sameNameClassesFromSupertypes.kt");
+            }
         }
 
         @Nested

compiler/testData/diagnostics/testsWithStdLib/resolve/sameNameClassesFromSupertypes.kt

@@ -0,0 +1,22 @@
+// FIR_IDENTICAL
+// SKIP_TXT
+
+abstract class MostBase {
+    inner class Inner(
+        val bad: String,
+    )
+}
+
+abstract class Base : MostBase() {
+    inner class Inner(
+        val name: String?,
+        val res: Int,
+    )
+}
+
+class A : Base() {
+    fun foo(l: List<Inner>) {
+        val m = l.groupBy(Inner::name)
+        m[""]!![0].res
+    }
+}

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

@@ -34842,6 +34842,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
             public void testSamOverloadsWithKtFunctionWithoutRefinedSams() throws Exception {
                 runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/samOverloadsWithKtFunctionWithoutRefinedSams.kt");
             }
+
+            @Test
+            @TestMetadata("sameNameClassesFromSupertypes.kt")
+            public void testSameNameClassesFromSupertypes() throws Exception {
+                runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/sameNameClassesFromSupertypes.kt");
+            }
         }
 
         @Nested