Parsing multipart request without Content-Length header fails

[maxhq]

• Mojolicious version: 9.35
• Perl version: 5.36.0
• Operating system: Debian Bookworm (12.5)

Steps to reproduce the behavior

use v5.36;
use Mojo::Message::Request;

for my $with_len (0..1) {
    my $req = Mojo::Message::Request->new;
    $req->parse("GET /foo/bar/baz.html?foo13 HTTP/1.1\x0d\x0a");
    $req->parse("Content-Length: 128\x0d\x0a") if $with_len;
    $req->parse("Content-Type: multipart/form-data; boundary=----------0xKhTmLbOuNdArY\x0d\x0a\x0d\x0a");
    $req->parse("\x0d\x0a------------0xKhTmLbOuNdArY\x0d\x0a");
    $req->parse("Content-Disposition: form-data; name=\"text1\"\x0d\x0a");
    $req->parse("\x0d\x0ahallo welt test123");
    $req->parse("\x0d\x0a------------0xKhTmLbOuNdArY--");

    printf "%7s content-length: progress: %3i, body_size: %3i, text1: %s\n",
        'with'.($with_len ? '' : 'out'),
        $req->content->progress,
        $req->content->body_size,
        ($req->body_params->param('text1') // '');
}

# without content-length: progress: 128, body_size:  31, text1: 
#    with content-length: progress: 128, body_size: 128, text1: hallo welt test123

Expected behavior

Parsing should also work if no Content-Length was specified as this header does not seem to be mandatory for multipart/form-data (not mentioned in https://www.rfc-editor.org/rfc/rfc7578.html).

Actual behavior

The progress field hints that all data is parsed but for some reason the parts are not available.

[kraih]

Pretty sure that would be invalid according to the main HTTP spec.