Re: capi:collect-interfaces error

We should probably do better at preventing the error you got, but calling
capi:collect-interfaces with :sort-by :visible is not safe from a random
thread on macOS because it needs to make Cocoa calls to find the z order.

The default :sort-by :create should be safe, but of course can return out of
date information.

-- 
Martin Simmons
LispWorks Ltd
http://www.lispworks.com/



>>>>> On Mon, 16 Mar 2026 18:32:38 +0000, John DeSoi (as john at desoi dot dev) said:
> 
> On macOS when I call capi:collect-interfaces at a point where some interfaces may be closing, I get the error below. I think this is because the interface may have been collected right when it was closing causing the sort operation to error because it no longer has a Cocoa representation. 
> 
> I thought it was safe to call this function from outside of the interface process. If not, I don't see how it should be called using something like capi:apply-in-pane-process-wait-single if I don't have any interface to start with. Seems like a bug where the interface should have been removed before the sort.
> 
> Thanks,
> 
> John DeSoi, Ph.D.
> 
> 
> 
> Call to CERROR {offset 568}
>   CONDITIONS::CONTINUE-STRING  {Closing} : "Call ~S again"
>   CONDITIONS::DATUM                      : "No applicable methods for ~S with args ~S"
>   CONDITIONS::ARGUMENTS  {Closing}       : (#<STANDARD-GENERIC-FUNCTION CAPI-COCOA-LIBRARY::REPRESENTATION-WINDOW 80E0567E79> (NIL))
> 
> Call to (METHOD NO-APPLICABLE-METHOD (T)) {offset 64}
>   CLOS::GF   : #<STANDARD-GENERIC-FUNCTION CAPI-COCOA-LIBRARY::REPRESENTATION-WINDOW 80E0567E79>
>   CLOS::ARGS : (NIL)
> 
> Call to CAPI-COCOA-LIBRARY::COCOA-Z-SORT-CHILDREN-WITH-KEY {offset 264}
>   CAPI-COCOA-LIBRARY::ALL-CHILDREN  : #(#<Pointer: OBJC:OBJC-OBJECT-POINTER = #x0000000103907300> #<Pointer: OBJC:OBJC-OBJECT-POINTER = #x0000000143320060> #<Pointer: OBJC:OBJC-OBJECT-POINTER = #x00000001240B1390> #<Pointer: OBJC:OBJC-OBJECT-POINTER = #x00000001241FBC90> #<Pointer: OBJC:OBJC-OBJECT-POINTER = #x0000000124281BB0> #<Pointer: OBJC:OBJC-OBJECT-POINTER = #x000000010393B430> #<Pointer: OBJC:OBJC-OBJECT-POINTER = #x000000010395E680> #<Pointer: OBJC:OBJC-OBJECT-POINTER = #x000000012414ADE0> #<Pointer: OBJC:OBJC-OBJECT-POINTER = #x000000010390E9A0>)
>   CAPI-COCOA-LIBRARY::CAPI-CHILDREN : (#<D5::FORM-INTERFACE "D5" 81B0869903> #<D5::FORM-INTERFACE "Method: 1000 / 8186" 81B086A8C3> #<D5::FORM-INTERFACE "Structure: 5 / 5" 8260009D33> #<D5::FORM-INTERFACE "Method Call: 1000 / 38087" 8260009B53>)
>   CAPI-COCOA-LIBRARY::KEY           : CAPI-COCOA-LIBRARY::REPRESENTATION-WINDOW
> 
> Call to (METHOD CAPI:COLLECT-INTERFACES (CAPI:INTERFACE)) {offset 872}
>   CAPI::PROTO                 : #<D5::FORM-INTERFACE {Prototype} 81B03368BB>
>   DBG::G                      : (:SCREEN :ANY :SORT-BY :VISIBLE)
>   CAPI:SCREEN                 : :ANY
>   CAPI::KEEP-ORDER            : NIL
>   CAPI::CURRENT-PROCESS-FIRST : T
>   CAPI::SORT-BY  {Closing}    : :VISIBLE
> 
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