[INFO] fetching crate langid 0.0.1...
[INFO] checking langid-0.0.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate langid 0.0.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate langid 0.0.1 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate langid 0.0.1
[INFO] finished tweaking crates.io crate langid 0.0.1
[INFO] tweaked toml for crates.io crate langid 0.0.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages
[INFO] [stderr]       Adding glob v0.2.11 (latest: v0.3.1)
[INFO] [stderr]       Adding itertools v0.4.19 (latest: v0.12.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded itertools v0.4.19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8919abc7e601f946a91833661191525c067ed3a50ad5a02499b4186a429c2d9
[INFO] running `Command { std: "docker" "start" "-a" "d8919abc7e601f946a91833661191525c067ed3a50ad5a02499b4186a429c2d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8919abc7e601f946a91833661191525c067ed3a50ad5a02499b4186a429c2d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8919abc7e601f946a91833661191525c067ed3a50ad5a02499b4186a429c2d9", kill_on_drop: false }`
[INFO] [stdout] d8919abc7e601f946a91833661191525c067ed3a50ad5a02499b4186a429c2d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c55e9b0387d9eae0960958ea75d4104fa296ab88054d5a725d7077e34419ccd4
[INFO] running `Command { std: "docker" "start" "-a" "c55e9b0387d9eae0960958ea75d4104fa296ab88054d5a725d7077e34419ccd4", kill_on_drop: false }`
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking langid v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/classifier.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |             try!(read_file(path, &mut buf));
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/classifier.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |             let model = try!(Model::deserialize(buf));
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/model.rs:46:22
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let string = try!(String::from_utf8(bytes));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/model.rs:47:27
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let ngram_ranks = try!(json::decode(string.as_str()));
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> src/utils.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut file = try!(File::create(path));
[INFO] [stdout]   |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> src/utils.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Ok(try!(file.write_all(contents)))
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/utils.rs:14:20
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut file = try!(File::open(path));
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/utils.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let bytes = try!(file.read_to_end(buf));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/utils.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut file = try!(File::open(path));
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/utils.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let bytes = try!(file.read_to_string(buf));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/classifier.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |             try!(read_file(path, &mut buf));
[INFO] [stdout]    |             ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/classifier.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |             let model = try!(Model::deserialize(buf));
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/model.rs:46:22
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let string = try!(String::from_utf8(bytes));
[INFO] [stdout]    |                      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/model.rs:47:27
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let ngram_ranks = try!(json::decode(string.as_str()));
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> src/utils.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let mut file = try!(File::create(path));
[INFO] [stdout]   |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> src/utils.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Ok(try!(file.write_all(contents)))
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/utils.rs:14:20
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut file = try!(File::open(path));
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/utils.rs:15:17
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let bytes = try!(file.read_to_end(buf));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/utils.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut file = try!(File::open(path));
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/utils.rs:22:17
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let bytes = try!(file.read_to_string(buf));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:41:52
[INFO] [stdout]    |
[INFO] [stdout] 41 |             DeserializeError::Utf8(ref err) => err.description(),
[INFO] [stdout]    |                                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:42:54
[INFO] [stdout]    |
[INFO] [stdout] 42 |             DeserializeError::Decode(ref err) => err.description(),
[INFO] [stdout]    |                                                      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:80:43
[INFO] [stdout]    |
[INFO] [stdout] 80 |             LoadError::Io(ref err) => err.description(),
[INFO] [stdout]    |                                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:81:52
[INFO] [stdout]    |
[INFO] [stdout] 81 |             LoadError::Deserialize(ref err) => err.description(),
[INFO] [stdout]    |                                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:41:52
[INFO] [stdout]    |
[INFO] [stdout] 41 |             DeserializeError::Utf8(ref err) => err.description(),
[INFO] [stdout]    |                                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:42:54
[INFO] [stdout]    |
[INFO] [stdout] 42 |             DeserializeError::Decode(ref err) => err.description(),
[INFO] [stdout]    |                                                      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:80:43
[INFO] [stdout]    |
[INFO] [stdout] 80 |             LoadError::Io(ref err) => err.description(),
[INFO] [stdout]    |                                           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/errors.rs:81:52
[INFO] [stdout]    |
[INFO] [stdout] 81 |             LoadError::Deserialize(ref err) => err.description(),
[INFO] [stdout]    |                                                    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "c55e9b0387d9eae0960958ea75d4104fa296ab88054d5a725d7077e34419ccd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c55e9b0387d9eae0960958ea75d4104fa296ab88054d5a725d7077e34419ccd4", kill_on_drop: false }`
[INFO] [stdout] c55e9b0387d9eae0960958ea75d4104fa296ab88054d5a725d7077e34419ccd4
[INFO] checking langid-0.0.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate langid 0.0.1 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate langid 0.0.1 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate langid 0.0.1
[INFO] finished tweaking crates.io crate langid 0.0.1
[INFO] tweaked toml for crates.io crate langid 0.0.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87c8d397bd0fb10f5920272bff4a18b4fc324b88e5b56e41aa1e9a3cc525eea4
[INFO] running `Command { std: "docker" "start" "-a" "87c8d397bd0fb10f5920272bff4a18b4fc324b88e5b56e41aa1e9a3cc525eea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87c8d397bd0fb10f5920272bff4a18b4fc324b88e5b56e41aa1e9a3cc525eea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87c8d397bd0fb10f5920272bff4a18b4fc324b88e5b56e41aa1e9a3cc525eea4", kill_on_drop: false }`
[INFO] [stdout] 87c8d397bd0fb10f5920272bff4a18b4fc324b88e5b56e41aa1e9a3cc525eea4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe45eb1cb23449da4a636a6fdd0c2fc7446c7c4965ad56e094a95f9ff340d2cc
[INFO] running `Command { std: "docker" "start" "-a" "fe45eb1cb23449da4a636a6fdd0c2fc7446c7c4965ad56e094a95f9ff340d2cc", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking itertools v0.4.19
[INFO] [stderr]     Checking glob v0.2.11
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]     --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/rustc-serialize-0.3.25/src/json.rs:1387:20
[INFO] [stdout]      |
[INFO] [stdout] 1387 |             _ => { panic!(); }
[INFO] [stdout]      |                    ^^^^^^^^ cannot infer type
[INFO] [stdout]      |
[INFO] [stdout]      = note: this error originates in the macro `$crate::panic::panic_2015` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-serialize` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "fe45eb1cb23449da4a636a6fdd0c2fc7446c7c4965ad56e094a95f9ff340d2cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe45eb1cb23449da4a636a6fdd0c2fc7446c7c4965ad56e094a95f9ff340d2cc", kill_on_drop: false }`
[INFO] [stdout] fe45eb1cb23449da4a636a6fdd0c2fc7446c7c4965ad56e094a95f9ff340d2cc