K2: add test for KT-56520, case (4), callable references (unbound)

Again, both frontends here ignored classifiers from
explicit star imported scope (some.HashMap, java.util.HashMap)
because of their ambiguity. In case of K2, it works so due to logic
in BodyResolveComponents.resolveRootPartOfQualifier.
This function is called to resolve qualifier without receiver.
See also cases (3) and (7).

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosticCompilerTestFE10TestdataTestGenerated.java

@@ -44767,6 +44767,12 @@ public class DiagnosticCompilerTestFE10TestdataTestGenerated extends AbstractDia
                     runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceCase.kt");
                 }
 
+                @Test
+                @TestMetadata("callableReferenceUnboundCase.kt")
+                public void testCallableReferenceUnboundCase() throws Exception {
+                    runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceUnboundCase.kt");
+                }
+
                 @Test
                 @TestMetadata("classLiteralCase.kt")
                 public void testClassLiteralCase() throws Exception {

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated.java

@@ -44767,6 +44767,12 @@ public class LLFirPreresolvedReversedDiagnosticCompilerFE10TestDataTestGenerated
                     runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceCase.kt");
                 }
 
+                @Test
+                @TestMetadata("callableReferenceUnboundCase.kt")
+                public void testCallableReferenceUnboundCase() throws Exception {
+                    runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceUnboundCase.kt");
+                }
+
                 @Test
                 @TestMetadata("classLiteralCase.kt")
                 public void testClassLiteralCase() throws Exception {

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

@@ -42645,6 +42645,12 @@ public class FirLightTreeOldFrontendDiagnosticsTestGenerated extends AbstractFir
                     runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceCase.kt");
                 }
 
+                @Test
+                @TestMetadata("callableReferenceUnboundCase.kt")
+                public void testCallableReferenceUnboundCase() throws Exception {
+                    runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceUnboundCase.kt");
+                }
+
                 @Test
                 @TestMetadata("classLiteralCase.kt")
                 public void testClassLiteralCase() throws Exception {

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

@@ -42765,6 +42765,12 @@ public class FirPsiOldFrontendDiagnosticsTestGenerated extends AbstractFirPsiDia
                     runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceCase.kt");
                 }
 
+                @Test
+                @TestMetadata("callableReferenceUnboundCase.kt")
+                public void testCallableReferenceUnboundCase() throws Exception {
+                    runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceUnboundCase.kt");
+                }
+
                 @Test
                 @TestMetadata("classLiteralCase.kt")
                 public void testClassLiteralCase() throws Exception {

compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceUnboundCase.fir.txt

@@ -0,0 +1,4 @@
+FILE: test.kt
+    public final fun test(): R|kotlin/reflect/KProperty1<kotlin/collections/HashMap<kotlin/String, kotlin/String>, kotlin/Int>| {
+        ^test Q|kotlin/collections/HashMap|::R|SubstitutionOverride<java/util/HashMap.size: R|kotlin/Int|>|
+    }

compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceUnboundCase.kt

@@ -0,0 +1,20 @@
+// FIR_IDENTICAL
+// ISSUE: KT-56520 (case 4, unbound)
+// FIR_DUMP
+// FULL_JDK
+
+// FILE: some/HashMap.java
+
+package some;
+
+public class HashMap<K, V> extends java.util.HashMap<K, V> {}
+
+// FILE: test.kt
+
+import java.util.*
+import some.*
+
+fun test() =
+    // Ok in both K1 & K2.
+    // K1 & K2 resolve this to kotlin.collections.HashMap.
+    HashMap<String, String>::size

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

@@ -44825,6 +44825,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                     runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceCase.kt");
                 }
 
+                @Test
+                @TestMetadata("callableReferenceUnboundCase.kt")
+                public void testCallableReferenceUnboundCase() throws Exception {
+                    runTest("compiler/testData/diagnostics/testsWithStdLib/resolve/ambiguousTypeReferences/callableReferenceUnboundCase.kt");
+                }
+
                 @Test
                 @TestMetadata("classLiteralCase.kt")
                 public void testClassLiteralCase() throws Exception {