Running fib.bf with bf.jq overflows stack / runs out of memory

[01mf02]

I took fib.bf and bf.jq from https://github.com/01mf02/jaq/tree/main/examples, then ran the commands in the README:

$ JQ=jq jqjq/jqjq -n "\"$(cat jqjq/fib.bf)\" | $(cat jqjq/bf.jq)"
jq: error: cannot allocate memory
$ JQ=jaq jqjq/jqjq -n "\"$(cat jqjq/fib.bf)\" | $(cat jqjq/bf.jq)"

thread 'main' has overflowed its stack
fatal runtime error: stack overflow, aborting
$ jq --version
jq-1.8.1
$ jaq --version
jaq 2.3.0

On the other hand, hello.bf works.

$ JQ=jq jqjq/jqjq -n "\"$(cat jqjq/hello.bf)\" | $(cat jqjq/bf.jq)"
"Hello, world!"
$ JQ=jaq jqjq/jqjq -n "\"$(cat jqjq/hello.bf)\" | $(cat jqjq/bf.jq)"
"Hello, world!"

[wader]

If i remember correctly when bisecting down why jqjq in jqjq runs out of memory it got much worse after this commit 8a02423 but i might be wrong.

[01mf02]

Just to make sure that we are on the same page: This issue is about bf in jqjq, not jqjq in jqjq ... :)
Do you think that the two are related?

[wader]

😄 It might be a lead. I know that at some point jqjq started to use much more memory than before and i only noticed it because jqjq in jqjq stopped working on my laptop 😞