Sorry -

an even shorter way .

     )clear
CLEAR WS
     →(0=⍴,0)/0
SYNTAX ERROR+
     →(0=⍴0)/0
     ^

Best Regards
Hans-Peter


Am 10.02.25 um 16:41 schrieb Hans-Peter Sorge:
Hi,

A simple path to reproduce the reported ")Copy bug" :


     )clear
CLEAR WS
     )copy Editor
SAVED 2025-02-10 09:15:01 (GMT-6)
     E∆Edit 'E∆Edit'

At all prompts you can type 'end' to exit or backup to the previous question.
You can often type 'help' to get help.

Enter your edit command?  edit
Enter the line numbers you wish to change, or [a,b,r]?  2
SYNTAX ERROR
E∆Piv[18]  →(0=⍴t)/0
          ^^
     )reset
     →(0=⍴,0)/0
SYNTAX ERROR+
     →(0=⍴0)/0
     ^

The difference!!! <⍴,0> vs <⍴0>

Best Regards
Hans-Peter

Am 10.02.25 um 15:34 schrieb Blake McBride:
I just checked.  None of the problems I reported were corrected with this change.

Thanks.

Blake


On Mon, Feb 10, 2025 at 7:53 AM Dr. Jürgen Sauermann <mail@jürgen-sauermann.de <mailto:mail@j%C3%BCrgen-sauermann.de>> wrote:

    Hi,

    latest news: I have corrected an error in the ∇-editor. *SVN 1833*.

    I am currently working on fixing a border case for function headers.
    Not entirely stable yet. Your problem might be related to specific
    function header cases.

    Best Regards,
    Jürgen


    On 2/10/25 13:55, Dr. Jürgen Sauermann wrote:
    Hi,

    I am definitely not arguing that the problem is outside GNU APL.
    However,
    it is very difficult for me to troubleshoot a problem that only
    occurs in the context
    of a workspace that I am not familiar with. So please help to
    simplify the issue
    to a smaller size.

    Thanks,
    Jürgen


    On 2/9/25 20:09, Blake McBride wrote:
    In case I haven't been clear, as far as I can tell, all of the
    problems are with GNU APL and none are with the Editor code. 
    At some earlier date, this exact editor code worked fine under
    GNU APL.  The editor code hasn't changed but no longer works;
    as reported.

    If errors in the editor are found, I am happy to correct them.

    Thanks.

    Blake


    On Sun, Feb 9, 2025 at 12:22 PM Blake McBride
    <blake1...@gmail.com> wrote:

        The help message should be printed by the first line
        of E∆Pim.  I checked it and the code is correct.  It just
        doesn't run.

        If I cut/paste the code into GNU APL it works fine.  But it
        doesn't run inside a function.

        Just FYI, this Editor WS was used in a
        production environment, on a daily basis, for years on
        other APL systems.  When moving it to GNU APL I had to type
        it in so typos are possible.  Other than typos, however,
        the code is solid.

        Thanks.

        Blake


        On Sun, Feb 9, 2025 at 11:51 AM Blake McBride
        <blake1...@gmail.com> wrote:

            Greetings,

            I haven't been using GNU APL for a while - just because
            I had other things I needed to do.  Now, trying to
            debug this issue I am finding several issues. Here is
            the first:

                  )load Editor
            SAVED 2025-02-09 10:13:37 (GMT-6)
                  ⎕IO←0
                  (⎕CR 'E∆Edit')[31;]
            EN1:→(2↑bv←qq E∆Pim'Enter your edit command')/END,EN1

                  E∆Edit 'E∆Edit'

            At all prompts you can type 'end' to exit or backup to
            the previous question.
            You can often type 'help' to get help.

            Enter your edit command?  help
            Enter your edit command?  end
            SYNTAX ERROR
            E∆Edit[31]  →(2↑bv←qq E∆Pim 'Enter your edit
            command')/31 34
                        ^^

            1. It shouldn't show "31 34".  It should show "END,EN1".

            2. Syntax error.  Really?  Where?

            3.  When I typed 'help' it should have seen a help
            message.  I haven't traced this through because of the
            syntax error.

            This code worked fine as-is when it was released.

            I'll see what I can do with #3.

            Thanks!

            Blake


            On Sun, Feb 9, 2025 at 10:07 AM Blake McBride
            <blake1...@gmail.com> wrote:

                Hello,

                I have been watching this thread.  My impression is
                that it is not my code but a bug in GNU APL.  If it
                is my code, I am very happy to fix it.  I will take
                a look.

                Thanks.

                Blake


                On Sun, Feb 9, 2025 at 9:08 AM Dr. Jürgen Sauermann
                <mail@jürgen-sauermann.de
                <mailto:mail@j%C3%BCrgen-sauermann.de>> wrote:

                    Hi Paul,

                    maybe Blake has an idea. For me it is very
                    difficult to fix
                    workspaces that were contributed by other
                    users. For the
                    author of the workspace fixing problems is far
                    more easy.

                    Best Regards,
                    Jürgen


                    On 2/8/25 19:48, Paul Rockwell wrote:
                    Unfortunately, I haven't been able to get this
                    reproduced with anything simpler.  I can
                    reliably reproduce this using Blake's APL
                    Editor found here:
                    https://github.com/blakemcbride/APLEditor

                    I don't believe it to be an error in the
                    functions themselves. I can )LOAD the original
                    workspace and "fix up" problematic functions
                    that I know have thrown the syntax error in
                    the past by simply opening and immediately
                    closing the funcion (no other changes) with
                    the ∇ editor. Things work fine after that.

                    II )SAVE the workspace, and then )LOAD the
                    saved copy, and the error re-appears.

                    I've validated the variables in the offending
                    statement each time the error appears. All
                    appears normal - there's no syntax error
                    apparent in the expression, so I have no idea
                    why the interpreter is throwing an error. If
                    the function/workspace had problems, to me it
                    seems as a result of the )save,)load,)copy
                    mechanisms. Only the ∇ editor gets me around
                    the issue - ⎕FX ⎕CR 'function-name' does not.

                    Any ideas on how I can help track this down?

                    - Paul


                    On Feb 8, 2025, at 11:34 AM, Dr. Jürgen
                    Sauermann <mail@jürgen-sauermann.de>
                    <mailto:mail@jürgen-sauermann.de> wrote:

                    Hi Paul,

                    that very much looks like an error in the
                    Editor workspace, doesn't it?
                    Can you reproduce the fault in plain APL?

                    Best Regards,
                    Jürgen


                    On 2/6/25 19:14, Paul Rockwell wrote:
                    I've been seeing syntax errors being thrown
                    on functions copied from another workspace.
                    I've imported Blake McBride's APL editor
                    from his GitHub site (linked to by the GNU
                    APL Community pages). It seems to be
                    reasonably up to date.

                    Once I have the workspace created containing
                    the editor application, I )SAVE it. I then
                    create a new workspace and )COPY the
                    functions in the editor workspace into my
                    current workspace. Then I attempt to use it
                    to edit a function (an alternative to the ∇
                    editor).

                    What I see is that the copied editor
                    function will fail with a syntax error on
                    branch statements within the function:

                          )copy Editor
                    SAVED 2025-01-19 15:03:52 (GMT-5)
                          E∆Edit 'asd'


                    At all prompts you can type 'end' to exit or
                    backup to the previous question.
                    You can often type 'help' to get help.


                    Enter the line numbers you wish to change,
                    or [a,b,r]?  2
                    SYNTAX ERROR
                    E∆Piv[18]  →(0=⍴t)/0
                               ^^

                    However, if you look at the variables
                    involved, there should be nothing that
                    should cause this syntax error

                          t
                    2
                          ⍴t
                    1
                          0=⍴t
                    0
                          0/0

                          ⍴0/0
                    0

                    The strange thing about this is that if I
                    open the offending function in the ∇ editor
                    and save it (making no changes), the error
                    goes away... at least for that function:

                          )si
                          ∇E∆Piv
                    [51] ∇
                          E∆Edit 'asd'


                    At all prompts you can type 'end' to exit or
                    backup to the previous question.
                    You can often type 'help' to get help.


                    Enter your edit command?  edit
                    Enter the line numbers you wish to change,
                    or [a,b,r]?  2
                    24

                    Enter your edit command?  end
                    SYNTAX ERROR
                    E∆Edit[31]  →(2↑bv←qq E∆Pim 'Enter your edit
                    command')/31 34
                                ^^



                    As you can see, another function is
                    exhibiting the same error. Like the E∆Piv
                    function, opening the E∆Edit function seems
                    to "fix"the issue.
                    What doesn't seem fix the issue is using ⎕CR
                    and ⎕FX as an alternative to the ∇ editor.

                          )reset
                          ⎕FX ⎕CR 'E∆Edit'
                    E∆Edit
                          E∆Edit 'asd'


                    At all prompts you can type 'end' to exit or
                    backup to the previous question.
                    You can often type 'help' to get help.


                    Enter your edit command?  edit
                    Enter the line numbers you wish to change,
                    or [a,b,r]?  2
                    24

                    Enter your edit command?  end
                    SYNTAX ERROR
                    E∆Edit[31]  →(2↑bv←qq E∆Pim 'Enter your edit
                    command')/31 34
                                ^^

                    As you can see, that didn't fix the problem.
                    Now open E∆Edit with the ∇ editor and see
                    what happens:

                          )reset
                          ∇E∆Edit
                    [41] ∇
                          E∆Edit 'asd'


                    At all prompts you can type 'end' to exit or
                    backup to the previous question.
                    You can often type 'help' to get help.


                    Enter your edit command?  edit
                    Enter the line numbers you wish to change,
                    or [a,b,r]?  2
                    24

                    Enter your edit command?  end


                    As I said, this is very strange behavior. I
                    can work around it, but quite honestly it's
                    a pain because I have no idea when the issue
                    is going to crop up again.

                    - Paul Rockwell








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