Public bug reported:
Description: Ubuntu 10.04.3 LTS
Package: tk8.5
Version: 8.5.8-1
If the display variable has an IPv4 mapped address, then any attempt to
open Tk windows crashes with the following error:
vega-a [x86_64.linux] 26% echo $DISPLAY
::ffff:127.0.0.1:1.0
vega-a [x86_64.linux] 27% idle
Traceback (most recent call last):
File "/usr/bin/idle", line 5, in <module>
main()
File "/usr/lib/python2.6/idlelib/PyShell.py", line 1386, in main
root = Tk(className="Idle")
File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1646, in __init__
self.tk = _tkinter.create(screenName, baseName, className, interactive,
wantobjects, useTk, sync, use)
_tkinter.TclError: Can't find a usable tk.tcl in the following directories:
/usr/share/tcltk/tcl8.5/tk8.5 /usr/lib/tk8.5 /usr/local/lib/tcltk/tk8.5
/usr/local/share/tcltk/tk8.5 /usr/lib/tcltk/tk8.5 /usr/share/tcltk/tk8.5
/lib/tk8.5 /usr/library
/usr/share/tcltk/tk8.5/tk.tcl: can't access "::tk::Priv.::ffff:127.0.0.1:1":
parent namespace doesn't exist
can't access "::tk::Priv.::ffff:127.0.0.1:1": parent namespace doesn't exist
while executing
"upvar #0 ::tk::Priv.::ffff:127.0.0.1:1 ::tk::Priv"
("uplevel" body line 1)
invoked from within
"uplevel #0 upvar #0 ::tk::Priv.$disp ::tk::Priv"
(procedure "tk::ScreenChanged" line 9)
invoked from within
"tk::ScreenChanged [winfo screen .]"
(file "/usr/share/tcltk/tk8.5/tk.tcl" line 290)
invoked from within
"source /usr/share/tcltk/tk8.5/tk.tcl"
("uplevel" body line 1)
invoked from within
"uplevel #0 [list source $file]"
This probably means that tk wasn't installed properly.
It appears that the :: in the DISPLAY variable is being misinterpreted
by Tcl, and causing this crash
There appears to be a patch mentioned
http://ubuntuforums.org/archive/index.php/t-1315426.html which I can
confirm works for us.
Here is the patch (credit to Tristan Schmelcher)
--- tk.tcl.8.5 2009-12-06 19:14:10.000000000 +0100
+++ tk.tcl.new 2009-12-06 19:19:04.000000000 +0100
@@ -248,7 +248,14 @@
set disp $screen
}
- uplevel #0 upvar #0 ::tk::Priv.$disp ::tk::Priv
+ # disp can legally contain "::", so we have to create the portion up to
+ # the last :: as a namespace.
+ set var_name ::tk::Priv.${disp}
+ set x [string last :: $var_name]
+ set namespace_name [string range $var_name 0 [expr {$x - 1}]]
+ namespace eval $namespace_name {}
+
+ uplevel #0 upvar #0 $var_name ::tk::Priv
variable ::tk::Priv
global tcl_platform
** Affects: tk8.5 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/867434
Title:
TK crashes with IPv4 mapped addresses in $DISPLAY
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