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Windows cannot run headless mode #37973

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Feature
#37975
Closed
Windows cannot run headless mode#37973
Feature
#37975
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yezhizhen
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A-servoshellP-windowsAny version of Windows capable of running Servo
@yezhizhen

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@yezhizhen
yezhizhen
opened on Jul 10, 2025

Describe the bug:

servo/ports/servoshell/desktop/app.rs

Lines 111 to 114 in 4615464

pub fn init(&mut self, event_loop: Option<&ActiveEventLoop>) {
let headless = self.servoshell_preferences.headless;
assert_eq!(headless, event_loop.is_none());

The assertion always fails, so it still runs headed window.

To Reproduce:
./mach test-wpt -r tests\wpt\mozilla\tests\mozilla\window_resizeTo.html --headless

Platform:
Windows

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A-servoshellP-windowsAny version of Windows capable of running Servo

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