From 97d7ba7ceb7b4bc676695e4cd1f373f02f4965e5 Mon Sep 17 00:00:00 2001
From: sagudev <16504129+sagudev@users.noreply.github.com>
Date: Sat, 26 Sep 2026 10:18:36 +0200
Subject: [PATCH] mapAsync on destroyed device

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
---
 .../api/validation/buffer/mapping.spec.ts     | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/src/webgpu/api/validation/buffer/mapping.spec.ts b/src/webgpu/api/validation/buffer/mapping.spec.ts
index 947d1e10ef44..c5badcd37c46 100644
--- a/src/webgpu/api/validation/buffer/mapping.spec.ts
+++ b/src/webgpu/api/validation/buffer/mapping.spec.ts
@@ -158,6 +158,37 @@ g.test('mapAsync,invalidBuffer')
     );
   });
 
+g.test('mapAsync,destroyedDevice')
+  .desc('Test that mapAsync is an error when called on a destroyed device.')
+  .params(u =>
+    u.combine('bufferState', ['valid', 'invalid'] as const).combine('awaitLost', [true, false])
+  )
+  .fn(async t => {
+    const { awaitLost, bufferState } = t.params;
+    const buffer =
+      bufferState === 'valid' ? t.createMappableBuffer(GPUMapMode.READ, 4) : vtu.getErrorBuffer(t);
+    t.expectDeviceLost('destroyed');
+
+    await t.testMapAsyncCall(
+      bufferState === 'valid'
+        ? 'success'
+        : { validationError: true, earlyRejection: false, rejectName: 'OperationError' },
+      buffer,
+      GPUMapMode.READ
+    );
+    buffer.unmap();
+    t.device.destroy();
+    if (awaitLost) {
+      const lostInfo = await t.device.lost;
+      t.expect(lostInfo.reason === 'destroyed');
+    }
+    await t.testMapAsyncCall(
+      { validationError: false, earlyRejection: false, rejectName: 'AbortError' },
+      buffer,
+      GPUMapMode.READ
+    );
+  });
+
 g.test('mapAsync,state,destroyed')
   .desc('Test that mapAsync is an error when called on a destroyed buffer.')
   .paramsSubcasesOnly(u => u.combine('mapMode', kMapModeOptions))