[INFO] updating cached repository JNhua/blockchain_Rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/JNhua/blockchain_Rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/JNhua/blockchain_Rust" "work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/JNhua/blockchain_Rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/JNhua/blockchain_Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/JNhua/blockchain_Rust" "work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/JNhua/blockchain_Rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/JNhua/blockchain_Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 113d9d1b4be9a69a141267eda5bcfc2fc991bd71
[INFO] sha for GitHub repo JNhua/blockchain_Rust: 113d9d1b4be9a69a141267eda5bcfc2fc991bd71
[INFO] validating manifest of JNhua/blockchain_Rust on toolchain master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of JNhua/blockchain_Rust on toolchain try#18481b65f318e0b4b20c0fc61340054701719d6c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing JNhua/blockchain_Rust
[INFO] finished frobbing JNhua/blockchain_Rust
[INFO] frobbed toml for JNhua/blockchain_Rust written to work/ex/pr-62507/sources/master#78ca1bda3522b14bc0336bc01dd1d49fdba2cda7/gh/JNhua/blockchain_Rust/Cargo.toml
[INFO] started frobbing JNhua/blockchain_Rust
[INFO] finished frobbing JNhua/blockchain_Rust
[INFO] frobbed toml for JNhua/blockchain_Rust written to work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/JNhua/blockchain_Rust/Cargo.toml
[INFO] crate JNhua/blockchain_Rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78ca1bda3522b14bc0336bc01dd1d49fdba2cda7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking JNhua/blockchain_Rust against try#18481b65f318e0b4b20c0fc61340054701719d6c for pr-62507
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62507/worker-4/try#18481b65f318e0b4b20c0fc61340054701719d6c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62507/sources/try#18481b65f318e0b4b20c0fc61340054701719d6c/gh/JNhua/blockchain_Rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+18481b65f318e0b4b20c0fc61340054701719d6c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 85ab4419eebe7f1a108c2d0b274e5631d4bf61afde681886612654047a895919
[INFO] running `"docker" "start" "-a" "85ab4419eebe7f1a108c2d0b274e5631d4bf61afde681886612654047a895919"`
[INFO] [stderr]    Compiling syn v0.15.32
[INFO] [stderr]     Checking urlparse v0.7.3
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]     Checking rust-crypto v0.2.36
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking miow v0.1.5
[INFO] [stderr]     Checking hyper v0.10.15
[INFO] [stderr]     Checking mio v0.5.1
[INFO] [stderr]     Checking native-tls v0.1.5
[INFO] [stderr]     Checking hyper-native-tls v0.2.4
[INFO] [stderr]     Checking requests v0.0.30
[INFO] [stderr]    Compiling serde_derive v1.0.90
[INFO] [stderr]     Checking canteen v0.5.1
[INFO] [stderr]     Checking blockchain_Rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: `RustcEncodable` is unstable
[INFO] [stderr]   --> src/main.rs:35:26
[INFO] [stderr]    |
[INFO] [stderr] 35 | #[derive(RustcDecodable, RustcEncodable, Debug, Clone, Serialize, Deserialize)]
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(crater_run)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: `RustcDecodable` is unstable
[INFO] [stderr]   --> src/main.rs:35:10
[INFO] [stderr]    |
[INFO] [stderr] 35 | #[derive(RustcDecodable, RustcEncodable, Debug, Clone, Serialize, Deserialize)]
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: `RustcEncodable` is unstable
[INFO] [stderr]   --> src/main.rs:42:26
[INFO] [stderr]    |
[INFO] [stderr] 42 | #[derive(RustcDecodable, RustcEncodable, Debug, Clone, Serialize, Deserialize)]
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: `RustcDecodable` is unstable
[INFO] [stderr]   --> src/main.rs:42:10
[INFO] [stderr]    |
[INFO] [stderr] 42 | #[derive(RustcDecodable, RustcEncodable, Debug, Clone, Serialize, Deserialize)]
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]   --> src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | use std::rc::Rc;
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]   --> src/main.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | use std::cell::RefCell;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `serde::de::Deserializer`
[INFO] [stderr]   --> src/main.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 | use serde::de::Deserializer;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: `RustcEncodable` is unstable
[INFO] [stderr]   --> src/main.rs:35:26
[INFO] [stderr]    |
[INFO] [stderr] 35 | #[derive(RustcDecodable, RustcEncodable, Debug, Clone, Serialize, Deserialize)]
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[deny(crater_run)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: `RustcDecodable` is unstable
[INFO] [stderr]   --> src/main.rs:35:10
[INFO] [stderr]    |
[INFO] [stderr] 35 | #[derive(RustcDecodable, RustcEncodable, Debug, Clone, Serialize, Deserialize)]
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: `RustcEncodable` is unstable
[INFO] [stderr]   --> src/main.rs:42:26
[INFO] [stderr]    |
[INFO] [stderr] 42 | #[derive(RustcDecodable, RustcEncodable, Debug, Clone, Serialize, Deserialize)]
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: `RustcDecodable` is unstable
[INFO] [stderr]   --> src/main.rs:42:10
[INFO] [stderr]    |
[INFO] [stderr] 42 | #[derive(RustcDecodable, RustcEncodable, Debug, Clone, Serialize, Deserialize)]
[INFO] [stderr]    |          ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]   --> src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 | use std::rc::Rc;
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]   --> src/main.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | use std::cell::RefCell;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `serde::de::Deserializer`
[INFO] [stderr]   --> src/main.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 | use serde::de::Deserializer;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `blockchain_Rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `blockchain_Rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "85ab4419eebe7f1a108c2d0b274e5631d4bf61afde681886612654047a895919"`
[INFO] running `"docker" "rm" "-f" "85ab4419eebe7f1a108c2d0b274e5631d4bf61afde681886612654047a895919"`
[INFO] [stdout] 85ab4419eebe7f1a108c2d0b274e5631d4bf61afde681886612654047a895919