fix(cli/worker): Print error stacks from the origin Worker (#7987)

Fixes #4728

1 files changed, 17 insertions, 2 deletions

diff --git a/cli/rt/11_workers.js b/cli/rt/11_workers.js
index 0a726a714..dcf98aee6 100644
--- a/cli/rt/11_workers.js
+++ b/cli/rt/11_workers.js
@@ -3,6 +3,7 @@
 
 ((window) => {
   const core = window.Deno.core;
+  const { Window } = window.__bootstrap.globalInterfaces;
   const { log } = window.__bootstrap.util;
 
   function createWorker(
@@ -142,7 +143,14 @@
         if (type === "terminalError") {
           this.#terminated = true;
           if (!this.#handleError(event.error)) {
-            throw Error(event.error.message);
+            if (globalThis instanceof Window) {
+              throw new Error("Unhandled error event reached main worker.");
+            } else {
+              core.jsonOpSync(
+                "op_host_unhandled_error",
+                { message: event.error.message },
+              );
+            }
           }
           continue;
         }
@@ -154,7 +162,14 @@
 
         if (type === "error") {
           if (!this.#handleError(event.error)) {
-            throw Error(event.error.message);
+            if (globalThis instanceof Window) {
+              throw new Error("Unhandled error event reached main worker.");
+            } else {
+              core.jsonOpSync(
+                "op_host_unhandled_error",
+                { message: event.error.message },
+              );
+            }
           }
           continue;
         }