Fail stuck render captures

build/client-renderer/src/client/java/dev/github/copilot/renameable/RenderCatalogClient.java

@@ -28,6 +28,7 @@ import net.minecraft.world.item.ItemStack;
 
 public final class RenderCatalogClient implements ClientModInitializer {
     private static final Gson GSON = new Gson();
+    private static final long CAPTURE_TIMEOUT_MILLIS = 120_000L;
 
     private final List<RenderJob> jobs = new ArrayList<>();
     private Path outputDir;
@@ -213,6 +214,7 @@ public final class RenderCatalogClient implements ClientModInitializer {
 
     private final class RenderScreen extends Screen {
         private boolean captureQueued;
+        private long captureQueuedAtMillis;
 
         private RenderScreen() {
             super(Component.literal("Rendering renameable items"));
@@ -220,10 +222,12 @@ public final class RenderCatalogClient implements ClientModInitializer {
 
         private void markCaptureQueued() {
             captureQueued = true;
+            captureQueuedAtMillis = System.currentTimeMillis();
         }
 
         private void resetCaptureState() {
             captureQueued = false;
+            captureQueuedAtMillis = 0L;
         }
 
         @Override
@@ -234,6 +238,10 @@ public final class RenderCatalogClient implements ClientModInitializer {
             if (currentJobIndex < jobs.size()) {
                 Minecraft client = Minecraft.getInstance();
                 RenderJob job = jobs.get(currentJobIndex);
+                if (captureQueued && captureQueuedAtMillis > 0L && System.currentTimeMillis() - captureQueuedAtMillis > CAPTURE_TIMEOUT_MILLIS) {
+                    throw new RuntimeException("Timed out waiting for screenshot capture for " + job.outputPath());
+                }
+
                 ItemStack stack = createStack(job);
                 if (stack.isEmpty()) {
                     client.execute(() -> advanceJob());