NI: Prefer nullable lower bound to flexible one when substitution of type variable is performed

^KT-32435 Fixed

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java

@@ -14642,6 +14642,11 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                 runTest("compiler/testData/diagnostics/tests/nullableTypes/elvisOnUnit.kt");
             }
 
+            @TestMetadata("inferenceFlexibleTToNullable.kt")
+            public void testInferenceFlexibleTToNullable() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/nullableTypes/inferenceFlexibleTToNullable.kt");
+            }
+
             @TestMetadata("nullAssertOnTypeWithNullableUpperBound.kt")
             public void testNullAssertOnTypeWithNullableUpperBound() throws Exception {
                 runTest("compiler/testData/diagnostics/tests/nullableTypes/nullAssertOnTypeWithNullableUpperBound.kt");

compiler/tests/org/jetbrains/kotlin/checkers/javac/DiagnosticsUsingJavacTestGenerated.java

@@ -14637,6 +14637,11 @@ public class DiagnosticsUsingJavacTestGenerated extends AbstractDiagnosticsUsing
                 runTest("compiler/testData/diagnostics/tests/nullableTypes/elvisOnUnit.kt");
             }
 
+            @TestMetadata("inferenceFlexibleTToNullable.kt")
+            public void testInferenceFlexibleTToNullable() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/nullableTypes/inferenceFlexibleTToNullable.kt");
+            }
+
             @TestMetadata("nullAssertOnTypeWithNullableUpperBound.kt")
             public void testNullAssertOnTypeWithNullableUpperBound() throws Exception {
                 runTest("compiler/testData/diagnostics/tests/nullableTypes/nullAssertOnTypeWithNullableUpperBound.kt");

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -18111,6 +18111,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/platformTypes"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
         }
 
+        @TestMetadata("inferenceFlexibleTToNullable.kt")
+        public void testInferenceFlexibleTToNullable() throws Exception {
+            runTest("compiler/testData/codegen/box/platformTypes/inferenceFlexibleTToNullable.kt");
+        }
+
         @TestMetadata("unsafeNullCheck.kt")
         public void testUnsafeNullCheck() throws Exception {
             runTest("compiler/testData/codegen/box/platformTypes/unsafeNullCheck.kt");

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

@@ -18111,6 +18111,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/platformTypes"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM, true);
         }
 
+        @TestMetadata("inferenceFlexibleTToNullable.kt")
+        public void testInferenceFlexibleTToNullable() throws Exception {
+            runTest("compiler/testData/codegen/box/platformTypes/inferenceFlexibleTToNullable.kt");
+        }
+
         @TestMetadata("unsafeNullCheck.kt")
         public void testUnsafeNullCheck() throws Exception {
             runTest("compiler/testData/codegen/box/platformTypes/unsafeNullCheck.kt");

compiler/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java

@@ -16595,6 +16595,11 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/platformTypes"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM_IR, true);
         }
 
+        @TestMetadata("inferenceFlexibleTToNullable.kt")
+        public void testInferenceFlexibleTToNullable() throws Exception {
+            runTest("compiler/testData/codegen/box/platformTypes/inferenceFlexibleTToNullable.kt");
+        }
+
         @TestMetadata("unsafeNullCheck.kt")
         public void testUnsafeNullCheck() throws Exception {
             runTest("compiler/testData/codegen/box/platformTypes/unsafeNullCheck.kt");

compiler/tests/org/jetbrains/kotlin/codegen/ir/IrBlackBoxCodegenTestGenerated.java

@@ -16595,6 +16595,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/testData/codegen/box/platformTypes"), Pattern.compile("^(.+)\\.kt$"), TargetBackend.JVM_IR, true);
         }
 
+        @TestMetadata("inferenceFlexibleTToNullable.kt")
+        public void testInferenceFlexibleTToNullable() throws Exception {
+            runTest("compiler/testData/codegen/box/platformTypes/inferenceFlexibleTToNullable.kt");
+        }
+
         @TestMetadata("unsafeNullCheck.kt")
         public void testUnsafeNullCheck() throws Exception {
             runTest("compiler/testData/codegen/box/platformTypes/unsafeNullCheck.kt");