D17740: Fix crash in extendSelection

[Kurt Hindenburg]

hindenburg added a comment.


  I can trigger crashes with/without this patch by double-clicking on last column, holding mouse button and moving up into scrollback.
  
  ASSERT: "y >= 0 && y < _lines" in file /home/kurthindenburg/Devel/KDE/src/kde/applications/konsole/src/TerminalDisplay.cpp, line 86
  
  #4  0x00007ffff78b9481 in Konsole::TerminalDisplay::loc (this=0x7117b0, x=79,  y=25)
  
    at /home/kurthindenburg/Devel/KDE/src/kde/applications/konsole/src/TerminalDisplay.cpp:86
  
  (gdb) p _lines
  $2 = 24

REPOSITORY
  R319 Konsole

REVISION DETAIL
  https://phabricator.kde.org/D17740

To: sandsmark, #konsole, hindenburg, pavelkh, cfeck
Cc: konsole-devel, #konsole, thsurrel, ngraham, maximilianocuria, hindenburg
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