#269 Missing method error is incorrect

[Tim Tomkinson]

The error message for a missing method is incorrect. For example:

package require Itcl

itcl::class C {}
set c [C #auto]
$c

In Itcl 3.4, this correctly displays:

wrong # args: should be one of...
  c0 cget -option
  c0 configure ?-option? ?value -option value...?
  c0 isa className
    while executing
"$c"

In Itcl 4.0.3, this incorrectly displays:

wrong # args: should be "::itcl::builtin::objectunknown object method ?arg...?"
    while executing
"::itcl::builtin::objectunknown c0"
    ("uplevel" body line 1)
    invoked from within
"uplevel 1 ::itcl::builtin::objectunknown c0 $args"
    invoked from within
"$c"

The error message is correct when an incorrect method is called, but it fails when a method name is omitted entirely. It looks like the function ItclBiObjectUnknownCmd() in itclBuiltin.c should allow a missing method name instead of throwing an error.

[Don Porter]

Confirmed on branch tips.

This is at least an improvement over Itcl 4.0.0, which segfaults
on the same demo script.

[Don Porter]

Proper fix likely a variation on the checkin that
stopped the segfault:

http://core2.tclers.tk/itcl/info/ee50a890cc70f5cd