For some reason, Appveyor CI didn't run on the pull request for legacy/trac#19506: https://github.com/torproject/tor/pull/216 When legacy/trac#19506 was merged to master, it failed Appveyor with: ``` ../src/tools/tor-print-ed-signing-cert.c:52:67: error: unknown conversion type character 'z' in format [-Werror=format=] fprintf(stderr, "ed25519_cert_parse failed with return value %zd\n", ^ ../src/tools/tor-print-ed-signing-cert.c:52:21: error: too many arguments for format [-Werror=format-extra-args] fprintf(stderr, "ed25519_cert_parse failed with return value %zd\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../src/tools/tor-print-ed-signing-cert.c:52:67: error: unknown conversion type character 'z' in format [-Werror=format=] fprintf(stderr, "ed25519_cert_parse failed with return value %zd\n", ^ ../src/tools/tor-print-ed-signing-cert.c:52:21: error: too many arguments for format [-Werror=format-extra-args] fprintf(stderr, "ed25519_cert_parse failed with return value %zd\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ```