set f [open $path(test1)]
    fconfigure $f -encoding shiftjis
    set x [list [gets $f line] $line]
    lappend x [tell $f] [testchannel inputbuffered $f] [eof $f]
    lappend x [gets $f line] $line
    close $f
    set x
} [list 15 "1234567890123０１" 18 0 1 -1 ""]
test io-7.4 {FilterInputBytes: recover from split up character} {stdio fileevent} {
    set f [open "|[list [interpreter] $path(cat)]" w+]
    fconfigure $f -encoding binary -buffering none
    puts -nonewline $f "1234567890123\x82\x4F\x82\x50\x82"
    fconfigure $f -encoding shiftjis -blocking 0
    fileevent $f read [namespace code "ready $f"]
    variable x {}