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https://issues.apache.org/jira/browse/GUACAMOLE-2075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17955146#comment-17955146
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Mike Jumper commented on GUACAMOLE-2075:
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I think this can be easily solved by adding a {{guac_display_stop()}} function
that can be called to ensure all background processes associated with the
{{guac_display}} are stopped.
> guac_display may segfault during cleanup
> ----------------------------------------
>
> Key: GUACAMOLE-2075
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-2075
> Project: Guacamole
> Issue Type: Bug
> Components: RDP, VNC
> Affects Versions: 1.6.0
> Reporter: Mike Jumper
> Assignee: Mike Jumper
> Priority: Blocker
> Fix For: 1.6.0
>
>
> Both VNC and RDP leverage the feature of {{guac_display}} where the
> underlying buffer of a layer can be provided externally, but they actually
> free that externally provided buffer prior to freeing the {{guac_display}}.
> Since worker threads may still be working on a frame at that time, those
> workers will cause a segfault if a frame is in progress at the time of
> disconnect.
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