#9650 NORM 1.5-F11: Hard lockup on tab-completion / shell-edit on VT

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#9650: Hard lockup on tab-completion / shell-edit on VT
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 Reporter:  martin.langhoff  |                 Owner:  dsaxena      
     Type:  defect           |                Status:  new          
 Priority:  normal           |             Milestone:  1.5-F11      
Component:  kernel           |               Version:  not specified
 Keywords:                   |           Next_action:  never set    
 Verified:  0                |   Deployment_affected:               
Blockedby:                   |              Blocking:               
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 This is on XO-1.5, Q3A15, os34. Steps to repro

  - Boot OS (tested booting to Sugar)
  - Switch to a VT, start root shell session
  - prepare a long command line, for example

   ls /usr/share/sugar-presence-service/telepathy_plugin.py

  - then return to the start of the line and add a "prior" parameter to the
 command, for example (with ^ indicating the cursor position):

   ls /usr/lib/python/site-packages/sugar/^ /usr/share/sugar-presence-
 service/telepathy_plugin.py

 At that point, the extended commandline sees some tearing of the image on
 the bottom right corner of the text, and the system locks up hard.

 I tried this in various ways. If I use just commandline edits (ctrl-w,
 ctrl-y) to add the "earlier" parameter, the problem does not happen. If I
 use tab-completion, it does happen everytime.

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Ticket URL: <http://dev.laptop.org/ticket/9650>
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