Fix NPE in KCallable.isAccessible for interfaces loaded by boot class loader

Class.getClassLoader returns null for classes loaded by the system class
loader (the one used to start the application). In this case we need to
use ClassLoader.getSystemClassLoader. We already have an extension
`safeClassLoader` specifically for this purpose in reflection.jvm, but
forgot to use it in d59f2bcc80.

 #KT-37707 Fixed

compiler/fir/fir2ir/tests/org/jetbrains/kotlin/codegen/ir/FirBlackBoxCodegenTestGenerated.java

@@ -23938,6 +23938,11 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
                 runTest("compiler/testData/codegen/box/reflection/functions/instanceOfFunction.kt");
             }
 
+            @TestMetadata("isAccessibleOnAllMembers.kt")
+            public void testIsAccessibleOnAllMembers() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/functions/isAccessibleOnAllMembers.kt");
+            }
+
             @TestMetadata("javaClassGetFunctions.kt")
             public void testJavaClassGetFunctions() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/functions/javaClassGetFunctions.kt");

compiler/testData/codegen/box/reflection/functions/isAccessibleOnAllMembers.kt

@@ -0,0 +1,20 @@
+// TARGET_BACKEND: JVM
+// IGNORE_BACKEND_FIR: JVM_IR
+// WITH_REFLECT
+
+import kotlin.reflect.jvm.isAccessible
+
+fun box(): String {
+    val members = Observer::class.members
+    for (member in members) {
+        member.isAccessible = true
+    }
+    return members.single { it.name == "result" }.call(Observer()) as String
+}
+
+class Observer : AutoCloseable {
+    override fun close() {
+    }
+
+    private fun result() = "OK"
+}

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

@@ -25524,6 +25524,11 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
                 runTest("compiler/testData/codegen/box/reflection/functions/instanceOfFunction.kt");
             }
 
+            @TestMetadata("isAccessibleOnAllMembers.kt")
+            public void testIsAccessibleOnAllMembers() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/functions/isAccessibleOnAllMembers.kt");
+            }
+
             @TestMetadata("javaClassGetFunctions.kt")
             public void testJavaClassGetFunctions() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/functions/javaClassGetFunctions.kt");

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

@@ -24341,6 +24341,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
                 runTest("compiler/testData/codegen/box/reflection/functions/instanceOfFunction.kt");
             }
 
+            @TestMetadata("isAccessibleOnAllMembers.kt")
+            public void testIsAccessibleOnAllMembers() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/functions/isAccessibleOnAllMembers.kt");
+            }
+
             @TestMetadata("javaClassGetFunctions.kt")
             public void testJavaClassGetFunctions() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/functions/javaClassGetFunctions.kt");

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

@@ -23938,6 +23938,11 @@ public class IrBlackBoxCodegenTestGenerated extends AbstractIrBlackBoxCodegenTes
                 runTest("compiler/testData/codegen/box/reflection/functions/instanceOfFunction.kt");
             }
 
+            @TestMetadata("isAccessibleOnAllMembers.kt")
+            public void testIsAccessibleOnAllMembers() throws Exception {
+                runTest("compiler/testData/codegen/box/reflection/functions/isAccessibleOnAllMembers.kt");
+            }
+
             @TestMetadata("javaClassGetFunctions.kt")
             public void testJavaClassGetFunctions() throws Exception {
                 runTest("compiler/testData/codegen/box/reflection/functions/javaClassGetFunctions.kt");

core/reflection.jvm/src/kotlin/reflect/jvm/internal/KDeclarationContainerImpl.kt

@@ -184,7 +184,7 @@ internal abstract class KDeclarationContainerImpl : ClassBasedDeclarationContain
 
             // Static "$default" methods should be looked up in each DefaultImpls class, see KT-33430
             if (isStaticDefault) {
-                val defaultImpls = superInterface.classLoader.tryLoadClass(superInterface.name + JvmAbi.DEFAULT_IMPLS_SUFFIX)
+                val defaultImpls = superInterface.safeClassLoader.tryLoadClass(superInterface.name + JvmAbi.DEFAULT_IMPLS_SUFFIX)
                 if (defaultImpls != null) {
                     parameterTypes[0] = superInterface
                     defaultImpls.tryGetMethod(name, parameterTypes, returnType)?.let { return it }