[MACTCL] http::get -channel broken in tcl 8.5.16 on MacOS 10.9

[Russell O. <ro...@uw...>]

The command http::geturl -channel is broken on MacOS 10.9.5 (and likely 
other versions). Transfers fail while writing to the channel with 
"resource temporarily unavailable". Transfers seem to work if -channel 
not specified. I have appended a simple example and posted a bug report
<http://core.tcl.tk/tcl/tktview/ed29c4da21f4c0a7858a0f5ae4aae20dd42fc818>

If anyone knows of a reasonable workaround, that would be great. I can 
almost certainly use a progress callback to manually write the data (and 
thus avoid using a channel) but unless there is some way to purge the 
data from the state array after writing it, that would fail on large 
files. (I see how to read the data, but not purge it.)

8.5.16 does fix the menu crashing bug that prevented me from updating 
past 8.5.11, but unfortunately this new bug is a show-stopper.

-- Russell

package require http

set outname "saturn.jpg"
set url 
"http://apod.nasa.gov/apod/image/1409/saturnequinox_cassini_7227.jpg"
set out [open "temp" w]
set token [::http::geturl $url -channel $out]
close $out
package require http

On MacOS with ActiveState Tcl 8.5.16 I see:
Error in startup script: error reading "sock8": resource temporarily 
unavailable
     while executing
"::http::geturl $url -channel $out"
     invoked from within
"set token [::http::geturl $url -channel $out]"
     (file "tcl http example.tcl" line 6)