Backtrace with zip storage

(rje) 1 % package require Thread
2.7.0
(rje) 2 % set t [thread::create]
tid00000FD0
(rje) 3 % thread::send $t {set errorInfo}
can not find channel named "rechan101"
    while executing
"fconfigure $nfd -translation binary"
    (procedure "open" line 22)
    invoked from within
"open fileded638 lib/tcl8.6/init.tcl {} 420"
    ("eval" body line 1)
    invoked from within
"eval [list $cmd $zipfd $relative] $args"
    (procedure "::vfs::zip::handler" line 6)
    invoked from within
"::vfs::zip::handler fileded638 open H:/rje/tclkit.exe lib/tcl8.6/init.tcl H:/rje/tclkit.exe/lib/tcl8.6/init.tcl {} 420"
    invoked from within
"source H:/rje/tclkit.exe/lib/tcl8.6/init.tcl"
    ("uplevel" body line 1)
    invoked from within
"uplevel #0 [list source [file join $tcl_library init.tcl]]"
    (procedure "tclInit" line 156)
    invoked from within
"tclInit"
(rje) 4 % thread::send $t {set auto_path}
can't read "auto_path": no such variable