<!DOCTYPE html> <html> <head> <title> Bug 1319486 : Crash if a texttrackcue added to different texttracks. </title> </head> <body> <video id=v1></video> <video id=v2></video> </body> <meta charset="utf-8"> <script type="text/javascript"> addEventListener('DOMContentLoaded', function(){ let cue,tt1,tt2; v1.play(); tt1 = v1.addTextTrack('metadata', "", ""); v1.play(); v1.currentTime = 8; cue = new VTTCue(0, 0.5, ""); tt1.addCue(cue); tt2 = v2.addTextTrack('captions', "", ""); tt2.addCue(cue); tt2.removeCue(cue); tt1.addCue(new VTTCue(0.7, 2, "")); }); </script> </html>