From 58d1e89426d39169e3d74f85a1939befdbee5d15 Mon Sep 17 00:00:00 2001
From: Ben Clayton <bclayton@google.com>
Date: Wed, 11 Jan 2023 20:05:37 +0000
Subject: [PATCH] dawn/node: Avoid empty vector index

If a device lists no features, don't zero-index an empty std::vector.

Change-Id: I10d632f0c5d5a162abec180797ad11adee67fc6b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/116863
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Auto-Submit: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
---
 src/dawn/node/binding/GPUDevice.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/dawn/node/binding/GPUDevice.cpp b/src/dawn/node/binding/GPUDevice.cpp
index 9e0baa700f..92ec3716ce 100644
--- a/src/dawn/node/binding/GPUDevice.cpp
+++ b/src/dawn/node/binding/GPUDevice.cpp
@@ -181,7 +181,9 @@ GPUDevice::~GPUDevice() {
 interop::Interface<interop::GPUSupportedFeatures> GPUDevice::getFeatures(Napi::Env env) {
     size_t count = device_.EnumerateFeatures(nullptr);
     std::vector<wgpu::FeatureName> features(count);
-    device_.EnumerateFeatures(&features[0]);
+    if (count > 0) {
+        device_.EnumerateFeatures(features.data());
+    }
     return interop::GPUSupportedFeatures::Create<GPUSupportedFeatures>(env, env,
                                                                        std::move(features));
 }