Open Bug 1739389 Opened 1 year ago Updated 1 year ago

Adding `message` event listener on a unloaded worker throws `NS_ERROR_UNEXPECTED`

Categories

(Core :: DOM: Workers, defect, P3)

Product:
Core
Component:
DOM: Workers
Type:
defect

Tracking

()

Tracking Flags:
Tracking Status
firefox93 --- verified
firefox96 --- verified

People

(Reporter: saschanaz, Unassigned)

Details

iframe = document.createElement("iframe");
document.body.append(iframe);
worker = new iframe.contentWindow.Worker(URL.createObjectURL(new Blob([])));
iframe.remove();
worker.addEventListener("message", () => {});

Copy-paste the code to the console.

Expected: No error as Chrome does, or a web compatible error
Actual: Gecko-specific NS_ERROR_UNEXPECTED

Severity: -- → S4
status-firefox93: --- → verified
status-firefox96: --- → verified
Priority: -- → P3
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