edfa537100
Static CRT crashes MSVCR* MSVC builds (in VS2008, VS2010, VS2012,
VS2013) according to CI and local tests. The reproducible crash happens
in `curl_mfprintf() -> fputc(s, stderr)` when trying to display the
warning message in `curl -V`. `stderr` is non-NULL and resolves to `2`.
This reproducer needs a debug-enabled build, but it's unrelated to debug
features or curl's memory tracker. It happens regardless of unity build,
CPU architecture or `DllMain()` use. Example from VS2013:
```
+ _bld/src/Debug/curl.exe --disable --version
./appveyor.sh: line 124: 203 Segmentation fault "${curl}" --disable --version
```
Ref: https://ci.appveyor.com/project/curlorg/curl/builds/51570451/job/ojpdqrsm1hmpmq6a#L210
Another crash happened in an UCRT build (VS2017) with a couple of
`printf()`s added to curl's `main()` function:
```
Microsoft Visual C++ Runtime Library
Debug Assertion Failed!
Program: C:/projects/curl/bld/src/Debug/curl.exe
File: minkernel/crts/ucrt/src/appcrt/heap/debug_heap.cpp
Line: 996
Expression: _act_first_block == header
```
(it hangs the job in CI due to the GUI popup)
Ref: https://github.com/curl/curl/pull/16394#issuecomment-2677181716
To avoid actual and potential issues, this patch issues a warning on
the shared-libcurl + static-CRT combination and falls back to the
default, shared CRT. IOW a static CRT build now requires a static curl
exe when using the `CURL_STATIC_CRT=ON` option.
Follow-up to
|
||
|---|---|---|
| .. | ||
| cmdline-opts | ||
| examples | ||
| internals | ||
| libcurl | ||
| .gitignore | ||
| ALTSVC.md | ||
| BINDINGS.md | ||
| BUG-BOUNTY.md | ||
| BUGS.md | ||
| CIPHERS-TLS12.md | ||
| CIPHERS.md | ||
| CMakeLists.txt | ||
| CODE_OF_CONDUCT.md | ||
| CODE_REVIEW.md | ||
| CONTRIBUTE.md | ||
| curl-config.md | ||
| CURL-DISABLE.md | ||
| CURLDOWN.md | ||
| DEPRECATE.md | ||
| DISTROS.md | ||
| EARLY-RELEASE.md | ||
| ECH.md | ||
| EXPERIMENTAL.md | ||
| FAQ | ||
| FEATURES.md | ||
| GOVERNANCE.md | ||
| HELP-US.md | ||
| HISTORY.md | ||
| HSTS.md | ||
| HTTP3.md | ||
| HTTP-COOKIES.md | ||
| HTTPSRR.md | ||
| INFRASTRUCTURE.md | ||
| INSTALL | ||
| INSTALL-CMAKE.md | ||
| INSTALL.md | ||
| INTERNALS.md | ||
| IPFS.md | ||
| KNOWN_BUGS | ||
| MAIL-ETIQUETTE.md | ||
| Makefile.am | ||
| MANUAL.md | ||
| mk-ca-bundle.md | ||
| options-in-versions | ||
| README.md | ||
| RELEASE-PROCEDURE.md | ||
| ROADMAP.md | ||
| RUSTLS.md | ||
| SECURITY-ADVISORY.md | ||
| SPONSORS.md | ||
| SSL-PROBLEMS.md | ||
| SSLCERTS.md | ||
| THANKS | ||
| THANKS-filter | ||
| TheArtOfHttpScripting.md | ||
| TODO | ||
| URL-SYNTAX.md | ||
| VERSIONS.md | ||
| VULN-DISCLOSURE-POLICY.md | ||
Documentation
You find a mix of various documentation in this directory and subdirectories, using several different formats. Some of them are not ideal for reading directly in your browser.
If you would rather see the rendered version of the documentation, check out the curl website's documentation section for general curl stuff or the libcurl section for libcurl related documentation.