Example app from the documentation crashes on Linux when pressing the "Stamp" button

The example app from the documentation at https://native-sdk.dev/docs/quick-start crashes on Linux when pressing the "Stamp" button

After compiling the app with "native build", run it with ./zig-out/bin/my-app and pressing the stamp button
you get a reproducible crash

s=1786634743454409533 level=info kind=event name="runtime.event" event="canvas_widget_pointer"
ts=1786634743454526151 level=info kind=event name="runtime.event" event="gpu_surface_input"
ts=1786634743674410437 level=info kind=event name="runtime.event" event="timer"
ts=1786634744174516755 level=info kind=event name="runtime.event" event="timer"
ts=1786634744320854556 level=info kind=event name="runtime.event" event="canvas_widget_pointer"
ts=1786634744320998149 level=info kind=event name="runtime.event" event="gpu_surface_input"
ts=1786634744329523694 level=info kind=event name="runtime.event" event="gpu_surface_frame"
ts=1786634744335039828 level=info kind=event name="runtime.event" event="gpu_surface_frame"
ts=1786634744435130674 level=info kind=event name="runtime.event" event="canvas_widget_pointer"
thread 3745 panic: Uncaught Error: an integer slot carries a non-integer or out-of-range value — the i64 encoding has no honest bytes for it
SC4013nsc_core_model_snapshotrebuild the app: an exception escaping a core entry is contract skew between the compiled core and its host bindings, and one build regenerates both from one contract.
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/debug/root.zig:121:27: 0x14baf4c in capturePanic (my-app)
std.debug.defaultPanic(msg, ra);
^
/run/media/pablo/SEGURO/pablo-seguro-minipc/prueba/prueba-native/my_app/.native/build/.zig-cache/o/e0fe0f3f463205701a1286dbd46428bb/shim_rt.zig:342:15: 0x14bc6ee in panicSink (my-app)
@panic(msg[0..msg_len]);
^
???:?:?: 0x14c7181 in ??? (???)
???:?:?: 0x14c6dd8 in ??? (???)
???:?:?: 0x14d7272 in ??? (???)
???:?:?: 0x14c6951 in ??? (???)
/run/media/pablo/SEGURO/pablo-seguro-minipc/prueba/prueba-native/my_app/.native/build/.zig-cache/o/e0fe0f3f463205701a1286dbd46428bb/core.zig:204:23: 0x13fa7d1 in snapshotModel (my-app)
abi.model_snapshot(&snap_ptr, &snap_len);
^
/run/media/pablo/SEGURO/pablo-seguro-minipc/prueba/prueba-native/my_app/.native/build/.zig-cache/o/e0fe0f3f463205701a1286dbd46428bb/core.zig:162:37: 0x13fc616 in update (my-app)
return .{ .model = snapshotModel(), .cmd = cmd_ptr[0..cmd_len] };
^
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/runtime/ts_core_host.zig:857:43: 0x13fbbab in dispatchDepth (my-app)
const result = core.update(model_root, msg);
^
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/runtime/ui_app.zig:1618:26: 0x13f8aef in applyMsg (my-app)
update_fx(&self.model, msg, &self.effects);
^
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/runtime/ui_app.zig:4005:70: 0x1350256 in handleRuntimeEvent (my-app)
.audio => |audio_event| if (self.effects.takeAudioMsg(audio_event)) |msg| {
^
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/runtime/ui_app.zig:3920:31: 0x13487f1 in eventFn (my-app)
handleRuntimeEvent(self, runtime, event_value) catch |err| {
^
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/runtime/api.zig:438:55: 0x13327bc in event (my-app)
if (self.event_fn) |event_fn| try event_fn(self.context, runtime, event_value);
^
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/runtime/gpu_surface_events.zig:684:39: 0x12cfdb6 in dispatchGpuSurfaceInput (my-app)
try self.dispatchEvent(app, .{ .canvas_widget_pointer = pointer_event });
^
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/runtime/flow.zig:417:101: 0x1241ffa in dispatchPlatformEvent (my-app)
.gpu_surface_input => |input_event| GpuSurfaceEventMethods().dispatchGpuSurfaceInput(self, app, input_event) catch |err| {
^
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/runtime/flow.zig:623:58: 0x133b53a in handlePlatformEvent (my-app)
try run_context.runtime.dispatchPlatformEvent(run_context.app, event_value);
^
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/platform/linux/root.zig:536:16: 0x133f29a in emit (my-app)
handler(context, event) catch {
^
../../../../../../../../home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/platform/linux/gtk_host.c:2214:25: 0x11891f5 in native_sdk_emit (../../../../../../../../home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/platform/linux/gtk_host.c)
if (host->callback) host->callback(host->callback_context, &event);
^
???:?:?: 0x7effbd08faa7 in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbcdd3b79 in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbcdd3cd8 in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbcdd3d93 in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbd150bb4 in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbcdb5e62 in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbcdd3b79 in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbcdd3cd8 in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbcdd3d93 in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbd15376d in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbd155efa in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbd156cba in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbd2e102a in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbd19cc71 in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbd19d7c2 in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbd0948da in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbd55a347 in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbcdb1bcb in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbcdd184a in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbcdd3293 in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbcdd3cd8 in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbcdd3d93 in ??? (/usr/lib/libgobject-2.0.so.0)
???:?:?: 0x7effbd560831 in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbd4b66fb in ??? (/usr/lib/libgtk-4.so.1)
???:?:?: 0x7effbcc9ec75 in ??? (/usr/lib/libglib-2.0.so.0)
???:?:?: 0x7effbcca0ed6 in ??? (/usr/lib/libglib-2.0.so.0)
???:?:?: 0x7effbcca1054 in ??? (/usr/lib/libglib-2.0.so.0)
???:?:?: 0x7effbcee6185 in ??? (/usr/lib/libgio-2.0.so.0)
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/platform/linux/root.zig:513:27: 0x133e550 in run (my-app)
native_sdk_gtk_run(self.host, gtkCallback, &self.state);
^
/home/pablo/.local/share/pnpm/store/v11/links/@native-sdk/cli/0.8.4/3fd569866a88f2713341b945bbad85ab0794459459dfb3720df000677242f1ca/node_modules/@native-sdk/cli/src/platform/types.zig:3370:27: 0x11905f4 in run (my-app)
return self.run_fn(self.context, handler, handler_context);
^
/run/media/pablo/SEGURO/pablo-seguro-minipc/prueba/prueba-native/my_app/.native/build/.zig-cache/o/e0fe0f3f463205701a1286dbd46428bb/main.zig:173:30: 0x119405d in main (my-app)
try runner.runWithOptions(app_state.app(), .{
^
???:?:?: 0x7effbc827780 in ??? (/usr/lib/libc.so.6)
???:?:?: 0x7effbc8278b8 in ??? (/usr/lib/libc.so.6)
???:?:?: 0x117caf4 in ??? (???)

Info about my system

uname -a
Linux minipc 6.18.43-1-MANJARO #1 SMP PREEMPT_DYNAMIC Fri, 07 Aug 2026 08:19:13 +0000 x86_64 GNU/Linux

native version
native 0.8.4 (commit a404ca1, automation protocol 0x096c8aa4730c11ec)

Reproduce the crash from the documentation quick-start example with native build, ./zig-out/bin/my-app, and the Stamp button. Start at the generated core.zig snapshotModel entry point and trace through runtime/ts_core_host.zig and platform/linux/root.zig. Done means the Linux example no longer panics when Stamp is pressed.