In Faust 2.23.1, an input file with the lines "// r visualisation tCst" and "//process = +: L: abM-^Q;" and "process = route(3333333333333333333,2,1,2,3,1) : *;" leads to stack consumption.
https://github.com/grame-cncm/faust/tree/e682dbeeb7cc0ec9a1fcb6872f53433e454aa233