feat: `queueMicrotask()` error handling (#15522)

Adds error event dispatching for queueMicrotask(). Consequently unhandled errors are now reported with Deno.core.terminate(), which is immune to the existing quirk with plainly thrown errors (#14158).

4 files changed, 47 insertions, 0 deletions

diff --git a/cli/tests/testdata/queue_microtask_error.ts b/cli/tests/testdata/queue_microtask_error.ts
new file mode 100644
index 000000000..b2e9642c5
--- /dev/null
+++ b/cli/tests/testdata/queue_microtask_error.ts
@@ -0,0 +1,5 @@
+queueMicrotask(() => {
+  throw new Error("foo");
+});
+console.log(1);
+Promise.resolve().then(() => console.log(2));
diff --git a/cli/tests/testdata/queue_microtask_error.ts.out b/cli/tests/testdata/queue_microtask_error.ts.out
new file mode 100644
index 000000000..6c4d41936
--- /dev/null
+++ b/cli/tests/testdata/queue_microtask_error.ts.out
@@ -0,0 +1,6 @@
+1
+error: Uncaught Error: foo
+  throw new Error("foo");
+        ^
+    at [WILDCARD]/queue_microtask_error.ts:2:9
+    at deno:core/[WILDCARD]
diff --git a/cli/tests/testdata/queue_microtask_error_handled.ts b/cli/tests/testdata/queue_microtask_error_handled.ts
new file mode 100644
index 000000000..7d1440135
--- /dev/null
+++ b/cli/tests/testdata/queue_microtask_error_handled.ts
@@ -0,0 +1,21 @@
+addEventListener("error", (event) => {
+  console.log({
+    cancelable: event.cancelable,
+    message: event.message,
+    filename: event.filename,
+    lineno: event.lineno,
+    colno: event.colno,
+    error: event.error,
+  });
+  event.preventDefault();
+});
+
+onerror = (event) => {
+  console.log("onerror() called", event.error);
+};
+
+queueMicrotask(() => {
+  throw new Error("foo");
+});
+console.log(1);
+Promise.resolve().then(() => console.log(2));
diff --git a/cli/tests/testdata/queue_microtask_error_handled.ts.out b/cli/tests/testdata/queue_microtask_error_handled.ts.out
new file mode 100644
index 000000000..7f3f7f84a
--- /dev/null
+++ b/cli/tests/testdata/queue_microtask_error_handled.ts.out
@@ -0,0 +1,15 @@
+1
+{
+  cancelable: true,
+  message: "Uncaught Error: foo",
+  filename: "[WILDCARD]/queue_microtask_error_handled.ts",
+  lineno: 18,
+  colno: 9,
+  error: Error: foo
+    at [WILDCARD]/queue_microtask_error_handled.ts:18:9
+    at deno:core/[WILDCARD]
+}
+onerror() called Error: foo
+    at [WILDCARD]/queue_microtask_error_handled.ts:18:9
+    at deno:core/[WILDCARD]
+2