Hi everybody, I need your help and experience in order to track the
origin of a problem that is plaguing the current version of rivet 2.3.0
when 'catch' is used in certain forms
The issue emerged when ::rivet::lempty (intensively called from dio.tcl
and other dio_*.tcl files) started to return 0 even when its only
argument was an empty list.
::rivet::lempty is very simple
proc lempty {list} {
if {[catch {llength $list} len]} { return 0 }
return [expr {$len == 0}]
}
and the problem is with 'catch' failing with a syntax error. The problem
turned out to be related to ::rivet::catch (at least removing this
command from the installation restores the expected lempty behavior).
Still Rivet intentionally doesn't export the command ::rivet::catch and
therefore it can't be imported into the global namespace so that the
core command in not shadowed. Someone has some explanation for this?
Another problem is with the setup that causes the problem: my Debian
'stretch' systems does have it, while a custom apache installation on
linux Mint works as expected.
any ideas?
-- Massimo
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