Bug? in Maxima 5.19.1 "Control stack guard page temporarily disabled"

The following code snippet works flawlessly
in Maxima 5.17.1 under a recent Ubuntu installation,
but not in Maxima 5.19.1

----------------------------------------------------
display2d : false;

my_f(x) := block(

        [res,t],
        res : integrate(1,t,-1,x),
        return(res)

)$

fy : my_f(y[2]);
----------------------------------------------------

here the output with maxima 5.17.1
----------------------------------------------------
$ maxima -b stackbug3.max
Maxima 5.17.1 http://maxima.sourceforge.net
Using Lisp SBCL 1.0.18.debian
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1)                        batch(stackbug3.max)

batching /home/user/tmp/stackbug3.max
(%i2)                          display2d : false
(%o2) false
(%i3) my_f(x):=block([res,t],res:integrate(1,t,-1,x),return(res))
(%i4) fy:my_f(y[2])
(%o4) y[2]+1
----------------------------------------------------

here the output with maxima 5.19.1
----------------------------------------------------
$ maxima -b stackbug3.max
http://maxima.sourceforge.net
Using Lisp SBCL 1.0.18.debian
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1)                        batch(stackbug3.max)

batching /home/user/tmp/stackbug3.max
(%i2)                          display2d : false
(%o2) false
(%i3) my_f(x):=block([res,t],res:integrate(1,t,-1,x),return(res))
(%i4) fy:my_f(y[2])
Control stack guard page temporarily disabled: proceed with caution
Maxima encountered a Lisp error:

 Control stack exhausted (no more space for function call frames).
This is probably due to heavily nested or infinitely recursive function
calls, or a tail call that SBCL cannot or has not optimized away.

PROCEED WITH CAUTION.

Automatically continuing.
To reenable the Lisp debugger set *debugger-hook* to nil.
Control stack guard page temporarily disabled: proceed with caution
Maxima encountered a Lisp error:

 Control stack exhausted (no more space for function call frames).
This is probably due to heavily nested or infinitely recursive function
calls, or a tail call that SBCL cannot or has not optimized away.

PROCEED WITH CAUTION.

Automatically continuing.
To reenable the Lisp debugger set *debugger-hook* to nil.
Control stack guard page temporarily disabled: proceed with caution
Maxima encountered a Lisp error:

 Control stack exhausted (no more space for function call frames).
This is probably due to heavily nested or infinitely recursive function
calls, or a tail call that SBCL cannot or has not optimized away.

PROCEED WITH CAUTION.

Automatically continuing.
To reenable the Lisp debugger set *debugger-hook* to nil.
(%o5) "/home/user/tmp/stackbug3.max"
----------------------------------------------------

I have updated after a suggestion from Dieter Kaiser,
who had mentioned that a bug I had encountered,
had been fixed in Maxima 5.19.1

Andre