71803 2011-11-08 05:24:41 -0800 [Qt] Flash Player GTK Crash 2014-02-03 03:19:12 -0800 1 1 1 Unclassified WebKit Plug-ins 420+ PC Linux RESOLVED INVALID P3 Normal --- 0 nicholas webkit-unassigned oldest_to_newest 497973 0 nicholas 2011-11-08 05:24:41 -0800 If you browse to any video on the BBC iPlayer (http://www.bbc.co.uk/iplayer/episode/b0175nh5/The_Choir_Military_Wives_Military_Wives/ as an example link), QtWebKit will fail to load the video (occasionally will load sound), it will then usually crash with a GTK error which GDB shows is in magazine_chain_pop_head. It appears as though GTK has created window space for the video plugin, as if you scroll it shows the bounds of the player. Occasionally when relaunching the browser it will allow you to play the last video attempted on crash, but will promptly fail for any other video. This issue occurs in Qt versions 4.7.1-4.7.4, and also in Qt 4.8.0, so it doesn't appear to be a new issue and also occurs with Flash Player plugins 10 & 11, issue has been tested on Ubuntu 10.04, 10.10 and 11.04. 497975 1 114048 nicholas 2011-11-08 05:25:33 -0800 Created attachment 114048 Attachment is GDB full backtrace of crashed stack 498732 2 nicholas 2011-11-09 01:45:41 -0800 Further to the initial report I've done some further testing. I've used Arora (http://code.google.com/p/arora/) which is based on QtWebKit as well, and the issue with Flash video playback on specific pages was present there, however Arora also has a ClickToFlash function which if it's enabled stops the flash plugin from being loaded with the page, if you then use click the 'Enable flash' button it'll start playing the video correctly without crashes. I've been told from a few people that the issue is with the Flash Player plugin, but this would seem to refute that as when the plugin is called after page load it appears to work fine. 508095 3 116349 nicholas 2011-11-23 06:07:00 -0800 Created attachment 116349 More GDB logging on issue Attachment contains a GDB run with a break attached to setNPWindowIfNeeded. 508114 4 nicholas 2011-11-23 06:43:04 -0800 More information: If I run within GDB and try loading one of the Flash videos that cause issues from iPlayer it seems to run the first time, however any further attempts results in no Flash player being drawn, and WebCore::PluginClientWrapper::PluginClientWrapper is never recalled, on something like YouTube any time a new Flash Video is encountered it'll always be called. 512656 5 nicholas 2011-12-01 02:45:29 -0800 Issue now affects all video on BBC website. Issue persists in latest beta releases of Flash Player 11 and through out the 10.x Flash Player range. 515041 6 nicholas 2011-12-05 05:33:35 -0800 Adding export G_SLICE=always-malloc before starting any Qt WebKit based browser will get the video to actually play routinely, but will cause segmentation faults fairly regularly. It appears as if the Plugin system is incorrectly managing the memory for very, very specific Flash plugin setups. 975339 7 jturcotte 2014-02-03 03:19:12 -0800 === Bulk closing of Qt bugs === If you believe that this bug report is still relevant for a non-Qt port of webkit.org, please re-open it and remove [Qt] from the summary. If you believe that this is still an important QtWebKit bug, please fill a new report at https://bugreports.qt-project.org and add a link to this issue. See http://qt-project.org/wiki/ReportingBugsInQt for additional guidelines. 114048 2011-11-08 05:25:33 -0800 2011-11-08 05:25:33 -0800 Attachment is GDB full backtrace of crashed stack gdb.txt text/plain 0 nicholas 116349 2011-11-23 06:07:00 -0800 2011-11-23 06:07:00 -0800 More GDB logging on issue nonloadingflashgdb.txt text/plain 10642 nicholas Li9jb25maWd1cmUgLWRlYnVnIC1vcGVuc291cmNlIC1mYXN0IC1uby1xdDNzdXBwb3J0IC1waG9u b24gLXdlYmtpdCAtb3BlbnNzbCAtbm9tYWtlIGV4YW1wbGVzIC1ub21ha2UgZGVtb3MgLWRidXMK CgpCcmVha3BvaW50IDUsIFdlYkNvcmU6OlBsdWdpblZpZXc6OnNldE5QV2luZG93SWZOZWVkZWQg KHRoaXM9MHhiNGNlNjAwMCkKICAgIGF0IHBsdWdpbnMvcXQvUGx1Z2luVmlld1F0LmNwcDo1NDcK NTQ3CSAgICBpZiAoIW1faXNTdGFydGVkIHx8ICFwYXJlbnQoKSB8fCAhbV9wbHVnaW4tPnBsdWdp bkZ1bmNzKCktPnNldHdpbmRvdykKKGdkYikgYnQKIzAgIFdlYkNvcmU6OlBsdWdpblZpZXc6OnNl dE5QV2luZG93SWZOZWVkZWQgKHRoaXM9MHhiNGNlNjAwMCkKICAgIGF0IHBsdWdpbnMvcXQvUGx1 Z2luVmlld1F0LmNwcDo1NDcKIzEgIDB4MDFhMmZlZWYgaW4gV2ViQ29yZTo6UGx1Z2luVmlldzo6 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