fix(native): ensure event ID for fastfail crashes

CHANGELOG.md

@@ -6,6 +6,10 @@
 
 - Android: Expose app-hang detection through the NDK bindings via `NdkOptions.setEnableAppHangTracking()` and `NdkOptions.setAppHangTimeoutMillis()`. ([#1823](https://github.com/getsentry/sentry-native/pull/1823))
 
+**Fixes**:
+
+- Native/Windows: ensure valid event IDs for fast-fail crash envelopes to fix launching of the external crash reporter for fast-fail crashes. ([#1832](https://github.com/getsentry/sentry-native/pull/1832))
+
 ## 0.15.2
 
 **Fixes**:

src/backends/native/sentry_crash_daemon.c

@@ -2373,6 +2373,8 @@ build_native_event(const sentry_crash_context_t *ctx,
 
     if (sentry_value_is_null(event)) {
         event = sentry_value_new_event();
+    } else {
+        sentry__ensure_event_id(event, NULL);
     }
 
     apply_breadcrumbs_from_ring_files(event, run_folder, ctx);

tests/assertions.py

@@ -447,8 +447,10 @@ def assert_inproc_crash(envelope):
 
 
 def assert_native_crash(envelope, exception_code=None):
+    assert envelope.headers["event_id"]
     event = envelope.get_event()
     assert event is not None
+    assert event["event_id"]
     assert_matches(event, {"level": "fatal"})
 
     exc = event["exception"]["values"][0]

tests/test_integration_native.py

@@ -82,6 +82,10 @@ def test_native_capture_crash(cmake, httpserver):
         )
     assert waiting.result
 
+    assert len(httpserver.log) >= 1
+    envelope = Envelope.deserialize(httpserver.log[0][0].get_data())
+    assert_native_crash(envelope)
+
 
 @pytest.mark.skipif(
     sys.platform != "win32" or bool(os.environ.get("TEST_MINGW")),