Git For Windows Curl -43- A Libcurl Function Was Given A Bad Argument ⭐ Newest

When Git triggers this, it’s almost never because of a typo in your command. Instead, it’s typically an between Git’s build of libcurl and the SSL/TLS backend available on your system. Common causes on Windows 1. Broken or missing SSL/TLS backend Git for Windows can be built with different SSL backends: OpenSSL , Schannel (Windows native), or Secure Channel . If your Git version expects OpenSSL but can’t find its certificates or DLLs, libcurl rejects internal arguments. 2. Conflicting http.sslBackend setting Manually setting git config --global http.sslBackend to a backend that isn’t compiled into your Git build triggers this exact error. 3. Corrupted Git installation or mixed installations If you have multiple Git versions (e.g., GitHub Desktop’s bundled Git, Cygwin Git, and official Git for Windows), environment variables like PATH can cause libcurl to load mismatched dependencies. 4. Proxy or custom http. configurations Unusual proxy settings or malformed http.sslCert / http.sslKey paths can also pass bad arguments to libcurl. How to fix it Step 1: Check your Git + libcurl version git --version curl --version Look for the SSL backend line, e.g.:

where git where curl If you see paths like C:\Program Files\Git\cmd\git.exe and also C:\Users\you\AppData\Local\GitHub\PortableGit... , reorder PATH so the official Git for Windows appears first. To confirm it’s not just Git, run:

curl 8.4.0 (Windows) libcurl/8.4.0 Schannel or When Git triggers this, it’s almost never because

curl --ssl-reqd https://google.com If that also fails with error 43, your libcurl installation is broken. Reinstalling Git for Windows fixes it. If you urgently need to clone a repo:

Here’s what’s happening and how to fix it. In libcurl (the library Git uses for HTTP requests), error CURLE_BAD_FUNCTION_ARGUMENT (43) means that a function received a parameter that is invalid or out of range for the operation. Broken or missing SSL/TLS backend Git for Windows

Got another weird Git + curl error? Drop it in the comments — I’ve probably debugged it.

Here’s a structured blog post draft tailored for developers encountering the curl: (43) A libcurl function was given a bad argument error on Git for Windows. If you’ve recently updated Git for Windows or switched to a new terminal environment, you might have run into this frustrating error: Conflicting http

git clone git@github.com:user/repo.git (Assuming you’ve set up SSH keys — that bypasses libcurl entirely.) The curl: (43) error on Git for Windows is almost always a libcurl/SSL backend mismatch or a bad global config value . Resetting http.sslBackend or reinstalling with Schannel solves it 99% of the time.

libcurl/8.4.0 OpenSSL/3.1.4 If you see Schannel , you’re using Windows native SSL. If OpenSSL , Git expects OpenSSL certificates. git config --global --unset http.sslBackend git config --global --unset http.sslVerify Then test:

curl: (43) A libcurl function was given a bad argument It usually appears when trying to clone a repository, fetch from a remote, or run any git command that uses HTTP/HTTPS transport — including git clone , git fetch , git pull , or even curl commands manually.

git ls-remote https://github.com/git/git.git Some corporate networks require Schannel. Set it correctly: