:   '''[info] errorstack'''
This subcommand of [info] returns the '''-errorstack''' field from the [return%|%option dictionary] trapped at the last [catch] or [try].

----
<<discussion>> errorstack for tcl 8.5
[HaO] 2012-09-07 As errorstack is a tcl 8.6 extension, one may simulate it with the following code for tcl 8.5.
I got this code is from [Alexandre Ferrieux] on clt and it is far to complex for me.
Alexandre has also fixed the bug which prevents using this code for before tcl 8.5.9.

======
if { [package vsatisfies [info patchlevel] 8.5.10-8.5.99] } {
        set ::errorLevel -1
        set ::errorStack {}
        
        trace add variable ::errorInfo write {
                set __n [ info level ]
                if {![regexp {\n    invoked from within\n} $::errorInfo]} {
                        set ::errorLevel -1;
                        set ::errorStack [list];
                }        
                if { ( $__n > 0 ) && ( $__n != $::errorLevel ) } {
                        set ::errorLevel $__n
                        set __l [info level 0]
                        lappend ::errorStack $__l
                }
                list }
}
======

<<discussion>>


<<categories>>Command