Insight freezes on Windows 7

[Fedin Pavel <p dot fedin at samsung dot com>]

 Hello!

 I am trying to use Insight on Windows 7, and have problems. Under 
certain conditions it freezes and GUI stops responding.
 This happens after you open and close target selection dialog, and 
then do one of the following:
a) Close main window.
b) Call any function which gets reference to Windows HWnd (for example 
"Print setup" dialog), or open "Select file" dialog (File->Open... for 
example).
c) Use 'Connect to target' option with no target set up. In this case it 
opens target selection dialog, then if you cancel it it should open 
MessageBox(), which freezes.

 Using sequential division method i figured out that the problem pops 
up because of port_list TCL function. If you comment it out, the problem 
disappears. More precisely, the problem is caused by the sequence:
if {[catch { set fd [::open COM$i: RDWR] } msg]} { <--- this succeeds
....
close $fd <--- Close the stream.
...
 It's even more strange that if you add for example 'puts "Ok!"' right 
before close call the problem disappears.

 This problem reproduces on all three possible flavours:
1. Cygwin
2. MinGW 32-bit
3. MinGW 64-bit.

 Yes, i have to patch the source in order to build (2) and (3).
 The problem is well reproducible on both last release (from 2009) and 
current CVS code.
 Right now i'm digging into Tcl_FSOpenFileChannel() in order to try to 
understand the true cause of the problem.

 Can anyone give me a hint ? Does anybody run on Win7 too ?

 P.S. Sorry if this is wrong list, i tried to post to insight-pr twice, 
but first time the message was rejected with "do not send spam to us" 
notice, second time with "this is wrong list" notice. I hope this time 
will work.

--
 Kind regards
 Pavel Fedin
 Expert engineer, Samsung R&D Institute Rus