Ok, more information becomes available...
This is expected behaviour for tcl. The fact that it works as a string
is a bug. The correct fix is to change the line in _ns_helper_eval that
does the uplevel to read:
set code [catch {uplevel 1 [eval concat $args]} result]
Rob Seeger
Robert Seeger wrote on 7/1/2004, 5:50 PM:
> I'm posting this here, but most are free to ignore it unless this bug
> (ns_eval of a comment) is affecting you. This just seemed like a good
> place to put the information so that Dossy has access to it.
>
> This bug is caused by the optimization in tcl to the way eval handles
> pure lists. By changing the pure list into one with a string
> representation, the problem goes away. A diff from the original init.tcl
> file to one that doesn't have the issue is:
>
> (210)>> diff init.tcl /tmp/myinit.tcl
> 208a209
> > string length $args
>
>
> In context, it looks like:
>
> proc _ns_helper_eval {args} {
> set didsaveproc 0
> if {[info proc _saved_ns_eval] == ""} {
> rename ns_eval _saved_ns_eval
> proc ns_eval {args} {
> set len [llength $args]
> if {$len == 0} {
> return
> } elseif {$len == 1} {
> set args [lindex $args 0]
> }
> uplevel 1 $args
> }
> set didsaveproc 1
> }
>
> string length $args
> set code [catch {uplevel 1 $args} result]
>
> if $didsaveproc {
> rename ns_eval ""
> rename _saved_ns_eval ns_eval
> }
> return -code $code $result
> }
>
>
> Rob Seeger
>
>
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