I did this

This reproducer will fail:

$ ./configure --with-openssl-quic --with-openssl --with-nghttp3 
$ make
$ curl --http3-only https://cloudflare-quic.com

I expected the following

no failure

curl/libcurl version

curl 8.17.0-DEV (x86_64-pc-linux-gnu) libcurl/8.17.0-DEV OpenSSL/4.0.0 libpsl/0.21.2 nghttp3/1.13.0-DEV
Release-Date: [unreleased]
Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns mqtt pop3 pop3s rtsp smb smbs smtp smtps telnet tftp ws wss
Features: alt-svc AsynchDNS HSTS HTTP3 HTTPS-proxy IPv6 Largefile NTLM PSL SSL threadsafe TLS-SRP UnixSockets

operating system

ubuntu 24.04