> As the documentation you quote says, you should limit the size of JSON texts you accept. [...] But this is completely unrelated to the maximum depth you accep

> As the documentation you quote says, you should limit the size of JSON texts you accept. [...] But this is completely unrelated to the maximum depth you accept. I'm not sure that's right. The documentation points out that a deep structure returned from the parser can crash the interpreter, because freeing data also uses recursion. ("due to perl itself recursing deeply on croak to free the temporary".) Anyway, I found the 512 depth limit too much... When using coroutines in Perl, the stack is smaller and it crashes trying just to print a JSON object with depth 512. I hit the limit at about depth 150, with nothing else on the C stack, so in robust diagnostic code that uses the JSON formatter to log data structures, I limit the max depth to 20.