secondvoice/src/test_static_logger.cpp

#include <fstream>
#include <string>
#include <windows.h>

// This mimics what we have in TranslationUI.cpp
class UILogger {
public:
    UILogger& operator<<(const std::string& msg) {
        buffer_ += msg;
        return *this;
    }
    UILogger& operator<<(int value) {
        buffer_ += std::to_string(value);
        return *this;
    }
    UILogger& operator<<(std::ostream& (*)(std::ostream&)) {
        std::ofstream log("ui_debug.log", std::ios::app);
        log << buffer_ << std::endl;
        buffer_.clear();
        return *this;
    }
    void flush() {}
private:
    std::string buffer_;
};

// This static object might be causing the crash!
static UILogger g_test_log;

int main() {
    MessageBoxA(NULL, "If you see this, static UILogger is NOT the problem!", "Test", MB_OK);

    g_test_log << "Test message" << std::endl;

    MessageBoxA(NULL, "Static logger works!", "Success", MB_OK);
    return 0;
}