PID 12063 received SIGSEGV for address: 0x20
0   segfault-handler.node               0x00000001027a5408 _ZL16segfault_handleriP9__siginfoPv + 312
1   libsystem_platform.dylib            0x00007fff78bf6f5a _sigtramp + 26
2   ???                                 0x0000000000000000 0x0 + 0
3   realm.node                          0x00000001048cf161 _ZN5realm5_impl16RealmCoordinator16promote_to_writeERNS_5RealmE + 141
4   realm.node                          0x00000001048b3fc0 _ZN5realm5Realm17begin_transactionEv + 180
5   realm.node                          0x000000010486ee88 _ZN5realm2js10RealmClassINS_4node5TypesEE5writeEPN2v87IsolateENS5_5LocalINS5_6ObjectEEERNS0_9ArgumentsIS3_EERNS0_11ReturnValueIS3_EE + 158
6   realm.node                          0x0000000104868e21 _ZN5realm2js4wrapIXadL_ZNS0_10RealmClassINS_4node5TypesEE5writeEPN2v87IsolateENS6_5LocalINS6_6ObjectEEERNS0_9ArgumentsIS4_EERNS0_11ReturnValueIS4_EEEEEEvRKN3Nan20FunctionCallbackInfoINS6_5ValueEEE + 238
7   realm.node                          0x000000010481348e _ZN3Nan3impL23FunctionCallbackWrapperERKN2v820FunctionCallbackInfoINS1_5ValueEEE + 136
8   node                                0x00000001001fa832 _ZN2v88internal25FunctionCallbackArguments4CallEPFvRKNS_20FunctionCallbackInfoINS_5ValueEEEE + 466
9   node                                0x000000010025af90 _ZN2v88internal12_GLOBAL__N_119HandleApiCallHelperILb0EEENS0_11MaybeHandleINS0_6ObjectEEEPNS0_7IsolateENS0_6HandleINS0_10HeapObjectEEESA_NS8_INS0_20FunctionTemplateInfoEEENS8_IS4_EENS0_16BuiltinArgumentsE + 816
10  node                                0x000000010025a5d0 _ZN2v88internalL26Builtin_Impl_HandleApiCallENS0_16BuiltinArgumentsEPNS0_7IsolateE + 288
11  ???                                 0x0000090e456042fd 0x0 + 9956898128637
12  ???                                 0x0000090e456bd196 0x0 + 9956898886038
Segmentation fault: 11

npm install realm segfault-handler

const Realm = require('realm');
const SegfaultHandler = require('segfault-handler');

SegfaultHandler.registerHandler('crash.log');

// Delete any previous default.realm
Realm.deleteFile({ });

async function test() {
  const realm = new Realm({ schema: [{ name: 'Clazz', properties: {} }] });
  const objects = realm.objects('Clazz');
  await new Promise(resolve => {
    objects.addListener((collection, changes) => {
      console.log(`Realm now contains ${collection.length} objects`);
      realm.close();
      resolve();
    });
    // Create an object
    realm.write(() => {
      realm.create('Clazz', {});
    });
  });
}

async function run() {
  for (let i = 0; i < 10; i++) {
    console.log(`Attempt #${i}`);
    await test();
  }
}

run().then(() => {
  process.exit(0);
}, err => {
  console.error(err);
  process.exit(1);
});