fix: Don't panic when a worker is closed in the reactions to a wasm operation. (#12270)

1 files changed, 21 insertions, 0 deletions

diff --git a/cli/tests/testdata/workers/close_in_wasm_reactions.js b/cli/tests/testdata/workers/close_in_wasm_reactions.js
new file mode 100644
index 000000000..abe573108
--- /dev/null
+++ b/cli/tests/testdata/workers/close_in_wasm_reactions.js
@@ -0,0 +1,21 @@
+// https://github.com/denoland/deno/issues/12263
+// Test for a panic that happens when a worker is closed in the reactions of a
+// WASM async operation.
+
+// The minimum valid wasm module, plus two additional zero bytes.
+const buffer = new Uint8Array([
+  0x00,
+  0x61,
+  0x73,
+  0x6D,
+  0x01,
+  0x00,
+  0x00,
+  0x00,
+  0x00,
+  0x00,
+]);
+WebAssembly.compile(buffer).catch((err) => {
+  console.log("Error:", err);
+  self.close();
+});