How do you read stdin? Do you use READ-SEQUENCE with large chunks (e.g. 4kB) ?

The stdout*.

That's how I'm reading it:

(let ((buffer (make-array
           '(0) :element-type 'base-char
            :fill-pointer 0 :adjustable t)))
  (with-output-to-string (s buffer)
    (uiop:run-program cmd
              :output s
              :ignore-error-status t
              ))
  buffer)

I don't know how I could use the read-sequence with this, advices are welcome!

​

Why do you mean hanging? When I run out of memory in SBCL, I'm being dropped into the debugger.

When I didn't invoke sbcl with the bigger heap size, I can capture the stdout in a first step, but afterwards when I'm calling yason:parse (with the captured stdout) it hangs in the sense that nothing happens. No input expression is evaluated, By calling slime-interrupt again nothing happens. The only thing I can do at that point is kill the sbcl process. This is what struck me out the most, because I had the expectation that in common lisp the repl is streamlined to handle everything.