test/crimson: should not capture temporary variables

otherwise, we are passing dangling pointers down to
`app_template::run()`.

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/test/crimson/test_alien_echo.cc b/src/test/crimson/test_alien_echo.cc
index ad91f74078a3380213244292306ba12320e6bd08..2000b590ad34d328b69158c84ea2b6109a88e69a 100644 (file)
--- a/src/test/crimson/test_alien_echo.cc
+++ b/src/test/crimson/test_alien_echo.cc
@@ -417,7 +417,7 @@ int main(int argc, char** argv)
     std::transform(begin(unrecognized_options),
                    end(unrecognized_options),
                    std::back_inserter(av),
-                   [](auto s) {
+                   [](auto& s) {
                      return const_cast<char*>(s.c_str());
                    });
     sc.run(app, av.size(), av.data());