On 07/12/2018 07:29 PM, Sheng Yang (杨圣) wrote: > the buffer is totally a waste of space when read1 is dealing with > everything ("[", "]", "(", ")", "#", "=", numbers, etc.) other than > the name of a symbol (usually tens of characters) or a string Thanks for reporting this. I attempted to work around the immediate problem by installing the attached into the emacs-26 branch. Although this doesn't address the overall problem of stack overflow, that is less pressing.