// gt-0012: Compile-time constant false condition
// Expected: UNREACHABLE (tier: imported)
// Vulnerability: CWE-120 (Buffer Overflow)

#include <stdio.h>
#include <string.h>

#define DEBUG_MODE 0  // Compile-time constant

int main(int argc, char *argv[]) {
    char buffer[64];
    
    // This branch is constant false - will be optimized out
    if (DEBUG_MODE) {
        // Vulnerable code in dead branch
        gets(buffer);  // SINK: CWE-120 (but unreachable)
        printf("Debug: %s\n", buffer);
    } else {
        // Safe path always taken
        if (argc > 1) {
            strncpy(buffer, argv[1], sizeof(buffer) - 1);
            buffer[sizeof(buffer) - 1] = '\0';
            printf("Input: %s\n", buffer);
        }
    }
    
    return 0;
}