roxygenize() leading to C stack reaching limit

[cdeterman]

When I run roxygenize() I get the error:

Error: C stack usage 7971312 is too close to the limit

When I run traceback() I get:

...
25: as.vector(x, mode)
24: as.vector(x, mode)
23: as.vector(x, mode)
22: as.vector(x, mode)
21: as.vector(x, "character")
20: as.vector(x, "character")
19: as.character.default(x$value@defined)
18: as.character(x$value@defined)
17: format_name(name)
16: eval(expr, envir, enclos)
15: eval(arg, env)
14: escape(eval(arg, env))
13: FUN(X[[i]], ...)
12: lapply(args, function(arg) {
        if (is.character(arg)) 
            return(arg)
        escape(eval(arg, env))
    })
11: build_rd(format_name(name), "(", arglist, ")")
10: function_usage(x$value@generic, formals(x$value), s4method)
9: default_usage.s4method(partitum$object)
8: default_usage(partitum$object)
7: wrap_string(default_usage(partitum$object))
6: process_usage(block)
5: add_tag(rd, process_usage(block))
4: block_to_rd(block, base_path, parsed$env)
3: roc_process.rd_roclet(roc, parsed, base_path, options = options)
2: roxygen2:::roc_process(roc, parsed, base_path, options = options) at #6
1: roc_out(roclets[2])

where as.vector(x, mode) continues to be called repeatedly until the error is thrown. I have tried to track down where this is happening and it appears to be finally crashing on this file from the function roc_process function which I debug with debugonce(roxygen2:::roc_process.rd_roclet).
Running again I can watch it go through my files until the function below crashes where marked.

function (roclet, parsed, base_path, options = list()) 
{
    blocks <- Filter(function(x) length(x) > 1, parsed$blocks)
    topics <- list()
    for (block in blocks) {
        new <- block_to_rd(block, base_path, parsed$env) # CRASHES HERE!!!
        if (is.null(new)) 
            next
        old <- topics[[new$filename]]
        topics[[new$filename]] <- merge.rd_file(old, new$rd)
    }
    topics <- process_family(topics)
    topics <- process_inherit_params(topics)
    fix_params_order(topics)
}

I really don't know what is wrong with my roxygen comments as I thought it was relatively simple but perhaps I am overlooking something.

Thank you

[muschellij2]

Same as #475