def check(n) s = "*"*n f = open("test.cpp","w") f.puts <<EOS #include <cstdio> int main(){ (#{s}printf)("Hello World\\n"); } EOS f.close() return system("clang++ test.cpp") end check(ARGV[0].to_i) $ ruby check.rb 10000 clang: error: unable to execute command: Illegal instruction: 4 clang: error: clang frontend command failed due to signal (use -v to see invocation) Apple LLVM version 10.0.1 (clang
![printfに4285個アスタリスクをつけるとclang++が死ぬ - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/0814b1c5e6069e29454a71e3d04c73a0a79f41ba/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9cHJpbnRmJUUzJTgxJUFCNDI4NSVFNSU4MCU4QiVFMyU4MiVBMiVFMyU4MiVCOSVFMyU4MiVCRiVFMyU4MyVBQSVFMyU4MiVCOSVFMyU4MiVBRiVFMyU4MiU5MiVFMyU4MSVBNCVFMyU4MSU5MSVFMyU4MiU4QiVFMyU4MSVBOGNsYW5nJTJCJTJCJUUzJTgxJThDJUU2JUFEJUJCJUUzJTgxJUFDJnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9NTYmcz0wOWYwMDUwYWVkY2ZhN2ZlZTdhNjU4OGJhYTM3MWNlMA%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBrYWl0eW8yNTYmdHh0LWNvbG9yPSUyMzIxMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT0zNiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZzPWQ4ZDhmMDMzNzMxYTgzNjc3OTdlMTZhMTE1YTdmMjM3%26blend-x%3D142%26blend-y%3D486%26blend-mode%3Dnormal%26s%3Da0248cdfb2d3daea0e3c71f25c22d2d7)