我向 Cargo.toml 添加了 openssl 依赖项。
[dependencies.openssl]
openssl = "0.2.12"
但是当我尝试构建和执行时，由于以下原因，它无法编译该板条箱：
type std::sync::mutex::StaticMutexGuard does not implement any method in scope named unwrap
完整输出：
pablo@boreth:~/pruebas/rust/hello_world$ cargo run --verbose
Fresh pkg-config v0.1.3
Compiling openssl-sys v0.2.12
Running `rustc /home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs --crate-name openssl-sys --crate-type lib -g -C metadata=e45df04b75965aa1 -C extra-filename=-e45df04b75965aa1 --out-dir /home/pablo/pruebas/rust/hello_world/target/deps --emit=dep-info,link -L /home/pablo/pruebas/rust/hello_world/target/deps -L /home/pablo/pruebas/rust/hello_world/target/deps -Awarnings -L native=/usr/lib/x86_64-linux-gnu -l ssl -l crypto`
/home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs:203:54: 203:62 error: type `std::sync::mutex::StaticMutexGuard` does not implement any method in scope named `unwrap`
/home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs:203 (*GUARDS)[n as uint] = Some(mutex.lock().unwrap());
^~~~~~~~
/home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs:214:14: 226:11 error: type `std::sync::once::Once` does not implement any method in scope named `call_once`
/home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs:214 INIT.call_once(|| {
/home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs:215 SSL_library_init();
/home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs:216 SSL_load_error_strings();
/home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs:217
/home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs:218 let num_locks = CRYPTO_num_locks();
/home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs:219 let mutexes = box range(0, num_locks).map(|_| MUTEX_INIT).collect::<Vec<_>>();
...
error: aborting due to 2 previous errors
Could not compile `openssl-sys`.
Caused by:
Process didn't exit successfully: `rustc /home/pablo/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.2.12/src/lib.rs --crate-name openssl-sys --crate-type lib -g -C metadata=e45df04b75965aa1 -C extra-filename=-e45df04b75965aa1 --out-dir /home/pablo/pruebas/rust/hello_world/target/deps --emit=dep-info,link -L /home/pablo/pruebas/rust/hello_world/target/deps -L /home/pablo/pruebas/rust/hello_world/target/deps -Awarnings -L native=/usr/lib/x86_64-linux-gnu -l ssl -l crypto` (status=101)
我正在使用 Ubuntu Ubuntu 14.04.1 LTS (Trusty Tahr)，并且我已经安装了 libssl-dev。
pablo@boreth:~$ uname -a
Linux boreth 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
pablo@boreth:~$ dpkg -l libssl-dev
Deseado=Desconocido/Instalar/Eliminar/Purgar/Retener
| Estado=No/Instalado/Config-files/Desempaquetado/Medio-conf/Medio-inst/espera-disparo/pendiente-disparo
|/ Err?=(ninguno)/Requiere-reinst (Estado,Err: mayúsc.=malo)
||/ Nombre Versión Arquitectura Descripción
+++-==========================================-==========================-==========================-=========================================================================================
ii libssl-dev:amd64 1.0.1f-1ubuntu2.7 amd64 Secure Sockets Layer toolkit - development files
rustc 和 cargo 版本：
$ rustc -V
rustc 0.13.0-nightly (636663172 2014-12-28 16:21:58 +0000)
$ cargo -V
cargo 0.0.1-pre-nightly (26ac282 2014-12-30 00:13:39 +0000)
有谁知道解决方案还是我应该等待更新？