exsh hangs on pipes

[emkey1]

mke@MacBook-Pro-M1 shellbench % ./shellbench -s exsh,bash sample/stringop4.sh

name exsh bash

stringop4.sh: str subst one builtin 64,653 449,970
stringop4.sh: str subst one echo | sed ^Czsh: terminated ./shellbench -s exsh,bash sample/stringop4.sh
mke@MacBook-Pro-M1 shellbench %