Native: terminate if cinterop ObjC reference conversion throws exception

To avoid forwarding Obj-C exceptions to Kotlin or vice versa.
Otherwise this might lead to a crash or other undesirable behaviour.

^KT-50648 Fixed

kotlin-native/backend.native/tests/build.gradle

@@ -4387,6 +4387,9 @@ if (PlatformInfo.isAppleTarget(project)) {
         it.defFile 'interop/objc/kt48816/objclib.def'
         it.headers "$projectDir/interop/objc/kt48816/objclib.h"
     }
+    createInterop("objc_kt50648") {
+        it.defFile 'interop/objc/kt50648/objclib.def'
+    }
 }
 
 createInterop("withSpaces") {
@@ -5033,6 +5036,16 @@ if (PlatformInfo.isAppleTarget(project)) {
         flags = ["-Xlazy-ir-for-caches=enable"]
     }
 
+    interopTest("interop_objc_kt50648") {
+        source = 'interop/objc/kt50648/main.kt'
+        interop = "objc_kt50648"
+        expectedExitStatusChecker = { it != 0 }
+        outputChecker = {
+            it.contains("Converting Obj-C blocks with non-reference-typed return value to kotlin.Any is not supported (v)") &&
+                    (it.contains("kfun:#main(){}") || project.globalTestArgs.contains('-opt')) // Stacktrace.
+        }
+    }
+
     standaloneTest("objc_arc_contract") {
         doBeforeBuild {
             mkdir(buildDir)

kotlin-native/backend.native/tests/interop/objc/kt50648/main.kt

@@ -0,0 +1,5 @@
+import objclib.*
+
+fun main() {
+    getVoidBlockAsId()
+}

kotlin-native/backend.native/tests/interop/objc/kt50648/objclib.def

@@ -0,0 +1,6 @@
+language = Objective-C
+---
+id getVoidBlockAsId() {
+    void (^result)(void) = ^{};
+    return result;
+}

kotlin-native/runtime/src/main/cpp/ObjCExport.mm

@@ -566,11 +566,13 @@ extern "C" id Kotlin_ObjCExport_refToLocalObjC(ObjHeader* obj) {
   return Kotlin_ObjCExport_refToObjCImpl<false>(obj);
 }
 
-extern "C" ALWAYS_INLINE id Kotlin_Interop_refToObjC(ObjHeader* obj) {
+// The function is marked with noexcept, so any exception reaching it will cause std::terminate.
+extern "C" ALWAYS_INLINE id Kotlin_Interop_refToObjC(ObjHeader* obj) noexcept {
   return Kotlin_ObjCExport_refToObjCImpl<false>(obj);
 }
 
-extern "C" ALWAYS_INLINE OBJ_GETTER(Kotlin_Interop_refFromObjC, id obj) {
+// The function is marked with noexcept, so any exception reaching it will cause std::terminate.
+extern "C" ALWAYS_INLINE OBJ_GETTER(Kotlin_Interop_refFromObjC, id obj) noexcept {
   // TODO: consider removing this function.
   RETURN_RESULT_OF(Kotlin_ObjCExport_refFromObjC, obj);
 }