[Tcl-bugs] [ tktoolkit-Bugs-3576114 ] text widget crashes on long lines if -wrap none is set

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Bugs item #3576114, was opened at 2012-10-10 13:04
Message generated for change (Comment added) made by fvogelnew1
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Category: 18. [text]
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Ian Gay (iangay)
Assigned to: Jeffrey Hobbs (hobbs)
Summary: text widget crashes on long lines if -wrap none is set

Initial Comment:
With -wrap none, a sufficiently long line crashes the session.
Running OpenSuse 11.4
Crash occurs with tcl/tk 8.5.9 and 8.6b2
Crash occurs with several different window managers

Following program exhibits the crash:

package require Tk
set log_file /home/ian/tcl/crash_log

proc main {} {
   text .t -width 80 -height 30 -bg white -font {arial -12} -wrap none
   pack .t -fill both -expand 1
   
   for {set i 0} {$i < 10000} {incr i} {
      update idletasks
      .t insert end "A"
      set fd [open $::log_file w]
      puts $fd $i
      close $fd
   }
}
main

Note that the log file records how many characters were added
before the crash. Experimenting with different font sizes shows
that the crash occurs when the line exceeds about 8050 pixels.

This is slightly similar to bug 624732 - but that is reported as fixed...


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Comment By: Francois VOGEL (fvogelnew1)
Date: 2012-10-13 10:53

Message:
Similar to #1449858 perhaps?

Works OK for me on either:
  - Windows Vista (Tk 8.5.9)
  - Debian 6.0 Squeeze (Tk 8.5.8)
  - Ubuntu 12.04 Precise Pangolin (Tk 8.5.11)

No OpenSuse at hand, sorry.


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