Expect Package breaking good ole 'puts'???

[tktuffkid]

I have spent the last couple of hours what appeared to be the most trivial of problems. Although I am able to workaround the problem, I am curious as to what is causing the problem...

In a nutshell, I had a standalone TCL script that essentially sat in a loop for 512 iterations...printing out information to stdout for each of the iterations.

When I ran the script from my Linux bash shell, only 280 or lines would get printed out...not 512. However, if I redirected to a file using Linux I/O, the file would appropriately contain 512 lines of my data.

With this knowledge I started toying around with every 'fconfigure' command available....but to no avail. I then started to inspect my script line by line and it wasn't until that I commented out 'package require Expect' did the problem go away. You can test it out with this very simple script below and notice the results by commenting in/out the 'package require Expect' line.

#!/bin/env tclsh
package require Expect
for {set i 0} {$i < 512} {incr i} {
puts "$i: 123456789012345678901234567890"
}

So my question is...what on earth is Expect doing to cause me to break good ole puts???

 

[ExpectTheUnexpected]

No problems here running above script in bash shell w/ and w/o "package require Expect".