fix(runtime/js/workers): throw errors instead of using an op (#12249)

cli/tests/testdata/workers/async_error.ts

@@ -0,0 +1,4 @@
+// deno-lint-ignore require-await
+(async () => {
+  throw new Error("bar");
+})();

cli/tests/testdata/workers/message_handler_error.ts

@@ -0,0 +1,4 @@
+postMessage("ready");
+onmessage = () => {
+  throw new Error("bar");
+};

cli/tests/testdata/workers/nonexistent_worker.out

@@ -1,3 +1,3 @@
 [WILDCARD]error: Uncaught (in worker "") Cannot resolve module "file:///[WILDCARD]/workers/doesnt_exist.js".
-error: Uncaught (in promise) Error: Unhandled error event reached main worker.
+error: Uncaught (in promise) Error: Unhandled error event in child worker.
     at Worker.#pollControl ([WILDCARD])

cli/tests/testdata/workers/permissions_blob_local.ts.out

@@ -1,4 +1,4 @@
 error: Uncaught (in worker "") Requires read access to "[WILDCARD]local_file.ts", run again with the --allow-read flag
     at blob:null/[WILDCARD]:1:0
-error: Uncaught (in promise) Error: Unhandled error event reached main worker.
+error: Uncaught (in promise) Error: Unhandled error event in child worker.
     at Worker.#pollControl ([WILDCARD])

cli/tests/testdata/workers/permissions_blob_remote.ts.out

@@ -1,4 +1,4 @@
 error: Uncaught (in worker "") Requires net access to "example.com", run again with the --allow-net flag
     at blob:null/[WILDCARD]:1:0
-error: Uncaught (in promise) Error: Unhandled error event reached main worker.
+error: Uncaught (in promise) Error: Unhandled error event in child worker.
     at Worker.#pollControl ([WILDCARD])

cli/tests/testdata/workers/permissions_data_local.ts.out

@@ -1,4 +1,4 @@
 error: Uncaught (in worker "") Requires read access to "[WILDCARD]local_file.ts", run again with the --allow-read flag
     at data:application/javascript;base64,[WILDCARD]:1:0
-error: Uncaught (in promise) Error: Unhandled error event reached main worker.
+error: Uncaught (in promise) Error: Unhandled error event in child worker.
     at Worker.#pollControl ([WILDCARD])

cli/tests/testdata/workers/permissions_data_remote.ts.out

@@ -1,4 +1,4 @@
 error: Uncaught (in worker "") Requires net access to "example.com", run again with the --allow-net flag
     at data:application/javascript;base64,aW1wb3J0ICJodHRwczovL2V4YW1wbGUuY29tL3NvbWUvZmlsZS50cyI7:1:0
-error: Uncaught (in promise) Error: Unhandled error event reached main worker.
+error: Uncaught (in promise) Error: Unhandled error event in child worker.
     at Worker.#pollControl ([WILDCARD])

cli/tests/testdata/workers/permissions_dynamic_remote.ts.out

@@ -2,5 +2,5 @@ error: Uncaught (in worker "") (in promise) TypeError: Requires net access to "e
 await import("https://example.com/some/file.ts");
 ^
     at async http://localhost:4545/workers/dynamic_remote.ts:2:1
-[WILDCARD]error: Uncaught (in promise) Error: Unhandled error event reached main worker.
+[WILDCARD]error: Uncaught (in promise) Error: Unhandled error event in child worker.
     at Worker.#pollControl ([WILDCARD])

cli/tests/testdata/workers/permissions_remote_remote.ts.out

@@ -1,4 +1,4 @@
 error: Uncaught (in worker "") Requires net access to "example.com", run again with the --allow-net flag
     at http://localhost:4545/workers/static_remote.ts:2:0
-error: Uncaught (in promise) Error: Unhandled error event reached main worker.
+error: Uncaught (in promise) Error: Unhandled error event in child worker.
     at Worker.#pollControl ([WILDCARD])

cli/tests/testdata/workers/test.ts

@@ -34,11 +34,6 @@ Deno.test({
       tsWorker.postMessage("Hello World");
     };
 
-    jsWorker.onerror = (e: Event) => {
-      e.preventDefault();
-      jsWorker.postMessage("Hello World");
-    };
-
     jsWorker.postMessage("Hello World");
     await promise;
     tsWorker.terminate();

cli/tests/testdata/workers/test_worker.js

@@ -1,19 +1,8 @@
-let thrown = false;
-
 if (self.name !== "") {
   throw Error(`Bad worker name: ${self.name}, expected empty string.`);
 }
 
 onmessage = function (e) {
-  if (thrown === false) {
-    thrown = true;
-    throw new SyntaxError("[test error]");
-  }
-
   postMessage(e.data);
   close();
 };
-
-onerror = function () {
-  return false;
-};

cli/tests/testdata/workers/worker_async_error.ts

@@ -0,0 +1,5 @@
+const worker = new Worker(
+  new URL("async_error.ts", import.meta.url).href,
+  { type: "module", name: "foo" },
+);
+setTimeout(() => worker.terminate(), 30000);

cli/tests/testdata/workers/worker_async_error.ts.out

@@ -0,0 +1,7 @@
+error: Uncaught (in worker "foo") (in promise) Error: bar
+  throw new Error("bar");
+        ^
+    at [WILDCARD]/async_error.ts:[WILDCARD]
+    at [WILDCARD]/async_error.ts:[WILDCARD]
+error: Uncaught (in promise) Error: Unhandled error event in child worker.
+    at Worker.#pollControl ([WILDCARD])

cli/tests/testdata/workers/worker_error.ts.out

@@ -1,5 +1,5 @@
 [WILDCARD]error: Uncaught (in worker "bar") Error: foo[WILDCARD]
     at foo ([WILDCARD])
     at [WILDCARD]
-error: Uncaught (in promise) Error: Unhandled error event reached main worker.
+error: Uncaught (in promise) Error: Unhandled error event in child worker.
     at Worker.#pollControl ([WILDCARD])

cli/tests/testdata/workers/worker_message_handler_error.ts

@@ -0,0 +1,8 @@
+const worker = new Worker(
+  new URL("message_handler_error.ts", import.meta.url).href,
+  { type: "module", name: "foo" },
+);
+worker.onmessage = () => {
+  worker.postMessage("ready");
+};
+setTimeout(() => worker.terminate(), 30000);

cli/tests/testdata/workers/worker_message_handler_error.ts.out

@@ -0,0 +1,7 @@
+error: Uncaught (in worker "foo") (in promise) Error: bar
+  throw new Error("bar");
+        ^
+    at onmessage ([WILDCARD]/message_handler_error.ts:[WILDCARD])
+    at [WILDCARD]
+error: Uncaught (in promise) Error: Unhandled error event in child worker.
+    at Worker.#pollControl ([WILDCARD])

cli/tests/testdata/workers/worker_nested_error.ts.out

@@ -1,5 +1,9 @@
 [WILDCARD]error: Uncaught (in worker "bar") Error: foo[WILDCARD]
-    at foo ([WILDCARD])
-    at [WILDCARD]
-error: Uncaught (in promise) Error: Unhandled error event reached main worker.
+  throw new Error("foo");
+        ^
+    at foo ([WILDCARD]/workers/error.ts:[WILDCARD])
+    at [WILDCARD]/workers/error.ts:[WILDCARD]
+error: Uncaught (in worker "baz") (in promise) Error: Unhandled error event in child worker.
+    at Worker.#pollControl ([WILDCARD])
+error: Uncaught (in promise) Error: Unhandled error event in child worker.
     at Worker.#pollControl ([WILDCARD])