[K/N][tests] Add a reproducer for KT-85399

SvyatoslavScherbina · Space Team · commit c9ab9db37a19 · 2026-04-15T08:58:23.000Z
This commit adds a test that is basically a simplified version of the code reported by the user in KT-85399, using Objective-C code instead of `@objc` Swift. (cherry picked from commit bef2b50)
diff --git a/native/native.tests/testData/codegen/cinterop/objc/kt85399.kt b/native/native.tests/testData/codegen/cinterop/objc/kt85399.kt
@@ -0,0 +1,53 @@
+// TARGET_BACKEND: NATIVE
+// DISABLE_NATIVE: isAppleTarget=false
+
+// KT-85399
+// IGNORE_NATIVE: optimizationMode=DEBUG
+// IGNORE_NATIVE: optimizationMode=NO
+
+// MODULE: cinterop
+// FILE: lib.def
+language = Objective-C
+headers = lib.h
+
+// FILE: lib.h
+#import <Foundation/Foundation.h>
+
+@protocol AService <NSObject>
+@end
+
+@interface AServiceImpl : NSObject <AService>
+@end
+
+@interface ServiceModule : NSObject
+@property (nonatomic, strong) Class<AService> _Nonnull aService;
+@end
+
+// FILE: lib.m
+#import "lib.h"
+
+@implementation AServiceImpl
+@end
+
+@implementation ServiceModule
+- (instancetype)init {
+    self = [super init];
+    if (self) {
+        _aService = [AServiceImpl class];
+    }
+    return self;
+}
+@end
+
+// MODULE: main(cinterop)
+// FILE: main.kt
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
+
+import lib.*
+
+fun box(): String {
+    val module = ServiceModule()
+    val service = module.aService
+
+    return if (service is AServiceProtocolMeta) "OK" else "FAIL: $service"
+}
