Re: [libmicrohttpd] Run-Time Check Failure(Static Link in Debug)

[Evgeny Grin]

Hi,

Did you build it from the official tarbal archive?

Have you compiled the example without any source code modification?

What is your compiler, librarian and linker settings?






--
Evgeny

On 11.09.2023 12:14, luozhaotian wrote:

Share your "Command line" for the library and the application if you added a VS project. Can you share the content of 'base64' and 'base64_len' parameters, when MHD_base64_to_bin_n() is called and then aborted with run-time check? Probably VS compiler requires an extra casting, while in practice the code has enough castings already.

When test https://www.gnu.org/software/libmicrohttpd/tutorial.html <https://www.gnu.org/software/libmicrohttpd/tutorial.html> chapter 5 Supporting basic authentication(libmicrohttpd-0.9.77/doc/examples/basicauthentication.cpp), i encounter this error: Run-Time Check Failure #1 - A cast to a smaller data type has caused a loss of data.  If this was intentional, you should mask the source of the cast with the appropriate bitmask.

The call stack:

Hello.exe!call_connection_handler(MHD_Connection * connection) line 3070
         ......
        MHD_basic_auth_get_username_password

I use Visual Studio 2022
Microsoft Visual Studio Community 2022 (64 位) - Current Version 17.5.3


But use dll is ok.

>Hello.exe!MHD_base64_to_bin_n(const char * base64, unsigned __int64 base64_len, void * bin, unsigned __int64 bin_size) line 1422 Hello.exe!MHD_basic_auth_get_username_password(MHD_Connection * connection, char * * password) line 95 Hello.exe!answer_to_connection(void * cls, MHD_Connection * connection, const char * url, const char * method, const char * version, const char * upload_data, unsigned __int64 * upload_data_size, void * * con_cls) line 46 I use Debug_x64 , and static link  to 0.9.77\x86_64\VS2022\Debug-static\libmicrohttpd_d.lib

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