On Wed, Nov 26, 2025 at 10:29:57PM -0600, Dima Pasechnik wrote:
> On Wed, Nov 26, 2025 at 4:28 PM Waldek Hebisch <[email protected]> wrote:
> >
> > On Wed, Nov 26, 2025 at 08:59:02AM -0600, Dima Pasechnik wrote:
> > > This was only a tip of the problem.
> > >
> > > We would like to have Sage working with GCL-compiled FriCAS, but it leaks
> > > messages on things added to the workspace asynchronously, without a way
> > > to suppress them via ")set mess".
> > >
> > > sage: fricas('3')
> > >
> > > ends with
> > >
> > > TypeError: An error occurred when FriCAS evaluated '3':
> > > Function declaration sageprint : InputForm -> String has been added to
> > > workspace.
> > >
> > > see <https://github.com/sagemath/sage/issues/40569>
> > >
> > > Is this a FriCAS bug?
> >
> > ATM there is no way to supress messages like 'Function declaration...'
> > or 'Compiling function...'. One user asked for way to disable
> > 'Compiling function...' messages, but quickly found a workaround and
> > dropped the request. If sage needs to disable those message
> > we can add appropriate control.
> >
> > However, concerning Sage use, output markers are supposed to delimit
> > parts that are intersting to Sage. So it would be good to know
> > what really does not work.
> >
> > Note that to change settings FriCAS must be at least partially
> > initialized and you will get earlier messages, printend
> > before you changed settings. There are confliciting demands
> > how much initialization is done before user code gets first
> > chance to intervene.
>
> There ought to be a startup option to be able to **start** FriCAS with the
> settings which suppress the messages needed to be suppressed,
> including these which cannot currently be suppressed.
One trouble is that enough needs to be initialized before there is
a chance to do any option processing. Let me add that fatal errors
can happen in various stages of startup and usually only startup
messages give hints which step failed.
> The current GCL-FriCAS issue shows that the messages appear out of sync with
> the read/write on FriCAS console.
>
> >> TypeError: An error occurred when FriCAS evaluated '3':
> >> Function declaration sageprint : InputForm -> String has been added to
> ^^^^^^^^^^^^^^
> > > workspace.
>
> (see "sage" getting in the middle of the message I underlined with ^^^^ above
> ?)
AFAIK this message appears both when using sbcl and GCL. And it was
there 18 years ago, when GCL interface worked.
> While it's possible to work around this by adding various timeouts in
> the communication
> loop, it's all getting even more fragile than it is now.
--
Waldek Hebisch
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