Minkowski failed, bad any_cast

[slashinfty]

I am confused on what has gone wrong here.

include <BOSL2/std.scad>

x=200;
t=3;

diff()
cuboid(
    [x,35+2*t,40],
    anchor=FRONT+LEFT+BOT,
    rounding=1.5,
    teardrop=true
){
    back(10)
    attach(
        TOP,
        BOT,
        inside=true,
        align=FRONT
    )
    cuboid(
        [x,20,40-2*t]
    );
};

When trying to render it, I get the following error:

WARNING: [manifold] Minkowski failed with error, falling back to Nef operation: bad any_cast

I am using OpenSCAD version 2026.02.19 (git 10cc3aa8) on Linux.

[slashinfty]

It appears that teardrop=true is the problem