[ERROR] Could not update repository "default": OpamDownload.Download_fail Curl failed

[winds365]

<><> Fetching repository information ><><><><><><><><><><><><><><><><><><><> 🐫
02:44.937 PARALLEL Iterate over 1 task(s) with 3 process(es)
02:44.937 PARALLEL Starting job 0 (worker 1/3): 0
02:44.937 REPOSITORY update default from https://opam.ocaml.org
02:44.937 CURL pull-repo-update
02:44.938 SYSTEM mkdir C:\Users\winds\AppData\Local\opam\repo\default.new
02:44.939 SYSTEM mkdir C:\Users\winds\AppData\Local\Temp\opam-15492-bb96f1
02:44.940 PARALLEL Next task in job 0: C:\WINDOWS\system32\curl.exe --write-out %{http_code}\n --retry 3 --retry-delay 2 --user-agent opam/2.2.0 -L -o C:\Users\winds\AppData\Local\Temp\opam-15492-bb96f1\index.tar.gz.part -- https://opam.ocaml.org/index.tar.gz
Processing 1/1: [default: http]

• C:\WINDOWS\system32\curl.exe "--write-out" "%{http_code}\n" "--retry" "3" "--retry-delay" "2" "--user-agent" "opam/2.2.0" "-L" "-o" "C:\Users\winds\AppData\Local\Temp\opam-15492-bb96f1\index.tar.gz.part" "--" "https://opam.ocaml.org/index.tar.gz"

• 000
• % Total % Received % Xferd Average Speed Time Time Time Current

•                              Dload  Upload   Total   Spent    Left  Speed
  

  0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
• curl: (43) A libcurl function was given a bad argument
  02:45.529 PARALLEL Collected task for job 0 (ret:43)
  02:45.529 SYSTEM rm C:\Users\winds\AppData\Local\Temp\opam-winds-15492\dl-15492-be8644
  02:45.529 CURL Could not download file at https://opam.ocaml.org/index.tar.gz.
  02:45.529 SYSTEM rmdir C:\Users\winds\AppData\Local\Temp\opam-15492-bb96f1
  02:45.530 SYSTEM rmdir C:\Users\winds\AppData\Local\opam\repo\default.new
  [ERROR] Could not update repository "default": OpamDownload.Download_fail(_, "Curl failed:
  "C:\\WINDOWS\\system32\\curl.exe --write-out %{http_code}\\n --retry 3 --retry-delay 2 --user-agent
  opam/2.2.0 -L -o C:\\Users\\winds\\AppData\\Local\\Temp\\opam-15492-bb96f1\\index.tar.gz.part --
  https://opam.ocaml.org/index.tar.gz\" exited with code 43")
  02:45.530 PARALLEL Job 0 finished
  02:45.530 SYSTEM rmdir C:\Users\winds\AppData\Local\opam
  [ERROR] Initial download of repository failed.
  'opam init -vvv --debug-level=3' failed.

C:\Users\winds>curl -V
curl 8.8.0 (Windows) libcurl/8.8.0 Schannel zlib/1.3 WinIDN
Release-Date: 2024-05-22
Protocols: dict file ftp ftps http https imap imaps ipfs ipns mqtt pop3 pop3s smb smbs smtp smtps telnet tftp
Features: alt-svc AsynchDNS HSTS HTTPS-proxy IDN IPv6 Kerberos Largefile libz NTLM SPNEGO SSL SSPI threadsafe Unicode UnixSockets

[winds365]

Windows version 22631.4037

[elazarg]

See #6120

[kit-ty-kate]

As mentioned in #6142 (comment) the issue is that Windows 11 currently ships with a broken curl binary and doesn't work for opam at all. You can fix that by either installing a newer version of curl (8.9.0 fixes the issue) manually or removing your opam root and calling:

opam init --cygwin-internal-install --cygwin-extra-packages=curl

I'll close this since it's a duplicate of #6120 but if you still have issues with those fixes feel free to add a comment on that issue. Thanks for the report!