This program crashes when running outside of the UCRT64 prompt

[ghost]

Note: It was generated by Copilot.

#include <cxxabi.h>
#include <iostream>
#include <memory>
#include <string>

std::string demangle(const char* mangled_name) {
    int status = 0;
    // Use abi::__cxa_demangle to demangle the name
    char* demangled_name = abi::__cxa_demangle(mangled_name, nullptr, nullptr, &status);

    // Wrap the demangled name in a smart pointer for automatic cleanup
    std::unique_ptr<char, void(*)(void*)> demangled_ptr(demangled_name, std::free);

    // Return the demangled name if successful, otherwise return the original name
    return (status == 0) ? demangled_ptr.get() : mangled_name;
}

int main() {
    const char* mangled_name = "_Z3fooi"; // Example mangled name
    std::cout << "Demangled name: " << demangle(mangled_name) << std::endl;
    return 0;
}

It runs fine and gives the expected result when running in the UCRT64 prompt.

[Biswa96]

It runs fine and gives the expected result when running in the UCRT64 prompt.

The program needs shared library (DLL) from ucrt64.

[Biswa96]

Yes, I tried the sample code. It works from command prompt after adding /ucrt64/bin in PATH.

[ghost]

Are you using Windows 10 or Windows 11? I'm using Windows 8.1 and I also have C:\msys64\ucrt64\bin in PATH.

[ghost]

libstdc++ is doing something wrong on my Windows 8.1 but libc++ doesn't.

[Biswa96]

I am using Windows 10. Hence, I asked to debug the program with a debugger to find the cause of the issue.

[ghost]

Something in ntdll.dll. I guess UCRT64 no longer support my Windows 8.1.

[ghost]

When I compiled with -static, the program can run normally outside the UCRT64 prompt.

[ghost]

OK. I found the problem. I have Meld installed and I don't know that it has added itself into PATH. The wrong version of libgcc_s_seh-1.dll and libstdc++-6 are loaded.