jnigen SIGABRT when called with null object

[brianquinlan]

This code:

    final privateKey = keyStore.getEntry('test-combined'.toJString(),
        bindings.KeyStore_ProtectionParameter.fromReference(jNullReference));
    print('>>> PRIVATE KEY: ${privateKey.getAttributes()}');

Leads to this failure:

JNI DETECTED ERROR IN APPLICATION: can't call java.util.Set java.security.KeyStore$Entry.getAttributes() on null object
F/ok_http_example( 6573): runtime.cc:716]     in call to CallObjectMethodV
F/libc    ( 6573): Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 6602 (1.ui), pid 6573 (ok_http_example)
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'google/sdk_gphone64_arm64/emu64a:15/AE3A.240806.036/12592187:user/release-keys'
Revision: '0'
ABI: 'arm64'
Timestamp: 2025-01-06 11:34:42.468317417-0800
Process uptime: 737s
Cmdline: com.example.ok_http_example
pid: 6573, tid: 6602, name: 1.ui  >>> com.example.ok_http_example <<<
uid: 10229
tagged_addr_ctrl: 0000000000000001 (PR_TAGGED_ADDR_ENABLE)
pac_enabled_keys: 000000000000000f (PR_PAC_APIAKEY, PR_PAC_APIBKEY, PR_PAC_APDAKEY, PR_PAC_APDBKEY)
signal 6 (SIGABRT), code -1 (SI_QUEUE), fault addr --------
Abort message: 'JNI DETECTED ERROR IN APPLICATION: can't call java.util.Set java.security.KeyStore$Entry.getAttributes() on null object
    in call to CallObjectMethodV'

The method being called is KeyStore.getEntry().

The generated Dart code:

  static final _getEntry = _$jni.ProtectedJniExtensions.lookup<
          _$jni.NativeFunction<
              _$jni.JniResult Function(
                  _$jni.Pointer<_$jni.Void>,
                  _$jni.JMethodIDPtr,
                  _$jni.VarArgs<
                      (
                        _$jni.Pointer<_$jni.Void>,
                        _$jni.Pointer<_$jni.Void>
                      )>)>>('globalEnv_CallObjectMethod')
      .asFunction<
          _$jni.JniResult Function(
              _$jni.Pointer<_$jni.Void>,
              _$jni.JMethodIDPtr,
              _$jni.Pointer<_$jni.Void>,
              _$jni.Pointer<_$jni.Void>)>();

  /// from: `public final java.security.KeyStore$Entry getEntry(java.lang.String string, java.security.KeyStore$ProtectionParameter protectionParameter)`
  /// The returned object must be released after use, by calling the [release] method.
  KeyStore_Entry getEntry(
    _$jni.JString string,
    KeyStore_ProtectionParameter protectionParameter,
  ) {
    return _getEntry(reference.pointer, _id_getEntry as _$jni.JMethodIDPtr,
            string.reference.pointer, protectionParameter.reference.pointer)
        .object(const $KeyStore_Entry$Type());
  }

[HosseinYousefi]

It seems that keyStore.getEntry returns null. Latest version of jnigen generates the code in a null-safe way based on the annotations on the underlying Java code.