can't read "dir": no such variable
    while executing
"file join $dir debug.tcl"
    (in namespace eval "::request" script line 2)
    invoked from within
"namespace eval ::request $script"
    ("::try" body line 12)
OUTPUT BUFFER:
if {![package vsatisfies [package require Tcl] 8.5]} return
package ifneeded debug            1.0.6 [list source [file join $dir debug.tcl]]
package ifneeded debug::heartbeat 1     [list source [file join $dir heartbeat.tcl]]
package ifneeded debug::timestamp 1     [list source [file join $dir timestamp.tcl]]
package ifneeded debug::caller    1.1   [list source [file join $dir caller.tcl]]