close $f
    set l
} {4096 10000 1 1 1 100000 1048576}
test io-38.3 {Tcl_SetChannelBufferSize, changing buffersize between reads} {
    # This test crashes the interp if Bug #427196 is not fixed

    set chan [open [info script] r]
    fconfigure $chan -buffersize 10 -encoding utf-8
    set var [read $chan 2]
    fconfigure $chan -buffersize 32
    append var [read $chan]
    close $chan
} {}

# Test Tcl_SetChannelOption, Tcl_GetChannelOption