alt-svc torture test fails

[MarcelRaad]

I did this

CC=gcc-8 ./configure --enable-debug --disable-shared --disable-threaded-resolver --enable-werror --enable-alt-svc --with-libssh2
make
cd tests
make
./runtests.pl -t -n -v 1654

I expected the following

Successful test. Instead, I got:

** MEMORY FAILURE 1 at 10:33:12
Leak detected: memory still allocated: 56 bytes
At 7fffeef464d8, there's 56 bytes.
 allocated by altsvc.c:245
LIMIT altsvc.c:188 malloc reached memlimit
 Failed on function number 1 in test.
 invoke with "-t1" to repeat this single case.

curl/libcurl version

8b987cc

curl 7.65.2-DEV (x86_64-pc-linux-gnu) libcurl/7.65.2-DEV OpenSSL/1.1.0g zlib/1.2.11 brotli/1.0.4 libidn2/2.0.4 libpsl/0.19.1 (+libidn2/2.0.4) libssh2/1.8.0 nghttp2/1.30.0 librtmp/2.3
Release-Date: [unreleased]
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: alt-svc brotli Debug HTTP2 HTTPS-proxy IDN IPv6 Largefile libz NTLM NTLM_WB PSL SSL TLS-SRP TrackMemory UnixSockets

operating system

Ubuntu 18.04