can i have some examples of how to use ttrace?
the example from this webste: http://wiki.tcl.tk/2770
is not working. I can call either the proc foo or bar in the thread.

################# Error msg ############################
Error in startup script: invalid command name "bar"
    while executing
"bar"
    ("for" body line 3)
    invoked from within
"for {set i 0} {$i < 4} {incr i} {
        set tid($i) [thread::create -preserved]
        bar
}"
    (file "wiki.tcl" line 4)
####################################################

code:
~~~~
package require Thread
package require Ttrace

for {set i 0} {$i < 4} {incr i} {
       	set tid($i) [thread::create -preserved]
	bar
}

ttrace::eval {
       proc foo {} {
          puts foo
       }
       proc bar {} {
          puts bar
       }
}


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