Fix assertion failure due to browser non-monotonic timestamp

Keavon · Keavon · commit 52d167c89a7b · 2026-03-28T16:30:59.000-07:00
diff --git a/editor/src/messages/input_mapper/utility_types/misc.rs b/editor/src/messages/input_mapper/utility_types/misc.rs
@@ -139,7 +139,8 @@ impl FrameTimeInfo {
 	}
 
 	pub fn advance_timestamp(&mut self, next_timestamp: Duration) {
-		debug_assert!(next_timestamp >= self.timestamp);
+		// Guard against non-monotonic timestamps from the browser (Keavon observed this once in Chrome)
+		let next_timestamp = next_timestamp.max(self.timestamp);
 
 		self.prev_timestamp = Some(self.timestamp);
 		self.timestamp = next_timestamp;

Original file line number	Diff line number	Diff line change
`@@ -139,7 +139,8 @@ impl FrameTimeInfo {`
`139`	`139`	`}`
`140`	`140`
`141`	`141`	`pub fn advance_timestamp(&mut self, next_timestamp: Duration) {`
`142`		`- debug_assert!(next_timestamp >= self.timestamp);`
	`142`	`+ // Guard against non-monotonic timestamps from the browser (Keavon observed this once in Chrome)`
	`143`	`+ let next_timestamp = next_timestamp.max(self.timestamp);`
`143`	`144`
`144`	`145`	`self.prev_timestamp = Some(self.timestamp);`
`145`	`146`	`self.timestamp = next_timestamp;`