can't read "dir": no such variable
    while executing
"file join $dir defer.tcl"
    (in namespace eval "::request" script line 5)
    invoked from within
"namespace eval ::request $script"
    ("::try" body line 12)
OUTPUT BUFFER:
if {![package vsatisfies [package provide Tcl] 8.6]} {
    # PRAGMA: returnok
    return
}
package ifneeded defer 1 [list source [file join $dir defer.tcl]]