-w %header{name} prints broken string on the second request

[highmtworks]

I did this

$ curl https://github.com/curl/curl -s -o /dev/null -w "%header{date}\n"
Wed, 13 Jul 2022 07:03:27 GMT

but,

$ curl https://github.com/curl/curl#[1-2] -s -o /dev/null -w "%header{date}\n"
Wed, 13 Jul 2022 07:03:44 GMT
%header{date

I expected the following

$ curl https://github.com/curl/curl#[1-2] -s -o /dev/null -w "%header{date}\n"
Wed, 13 Jul 2022 07:03:44 GMT
Wed, 13 Jul 2022 07:03:44 GMT

curl/libcurl version

curl 7.84.0 (x86_64-pc-cygwin) libcurl/7.84.0 OpenSSL/1.1.1q zlib/1.2.12 brotli/1.0.9 zstd/1.5.2 libidn2/2.3.2 libpsl/0.21.1 (+libidn2/2.3.2) libssh2/1.10.0 nghttp2/1.48.0
Release-Date: 2022-06-27
Protocols: dict file ftp ftps gopher gophers http https imap imaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp
Features: alt-svc AsynchDNS brotli GSS-API HSTS HTTP2 HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM NTLM_WB PSL SPNEGO SSL threadsafe TLS-SRP UnixSockets zstd

operating system

MSYS_NT-10.0-19044 hostname 3.3.5-341.x86_64 2022-07-04 21:33 UTC x86_64 Msys
on
Windows 10 Pro 21H2 19044.1766

[highmtworks]

I suspect https://github.com/curl/curl/blob/curl-7_84_0/src/tool_writeout.c#L393 is the cause.