[INFO] cloning repository https://github.com/NewtSun/rust-learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NewtSun/rust-learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNewtSun%2Frust-learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNewtSun%2Frust-learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3f578cd49c2736e9962f31b7b9ffbde0942f542a
[INFO] checking NewtSun/rust-learn against try#1bd50d4315eb15970d395b6be5823f9384707693 for pr-140151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNewtSun%2Frust-learn" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NewtSun/rust-learn on toolchain 1bd50d4315eb15970d395b6be5823f9384707693
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1bd50d4315eb15970d395b6be5823f9384707693" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NewtSun/rust-learn
[INFO] finished tweaking git repo https://github.com/NewtSun/rust-learn
[INFO] tweaked toml for git repo https://github.com/NewtSun/rust-learn written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/NewtSun/rust-learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1bd50d4315eb15970d395b6be5823f9384707693" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking NewtSun/rust-learn against try#1bd50d4315eb15970d395b6be5823f9384707693 for pr-140151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNewtSun%2Frust-learn" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NewtSun/rust-learn on toolchain 1bd50d4315eb15970d395b6be5823f9384707693
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1bd50d4315eb15970d395b6be5823f9384707693" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NewtSun/rust-learn
[INFO] finished tweaking git repo https://github.com/NewtSun/rust-learn
[INFO] tweaked toml for git repo https://github.com/NewtSun/rust-learn written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/NewtSun/rust-learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1bd50d4315eb15970d395b6be5823f9384707693" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1bd50d4315eb15970d395b6be5823f9384707693" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9964ad4f476309f9c14bf6cc89bce4e1732b66eb7af79a1ef1a37d50f3bcd0ab
[INFO] running `Command { std: "docker" "start" "-a" "9964ad4f476309f9c14bf6cc89bce4e1732b66eb7af79a1ef1a37d50f3bcd0ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9964ad4f476309f9c14bf6cc89bce4e1732b66eb7af79a1ef1a37d50f3bcd0ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9964ad4f476309f9c14bf6cc89bce4e1732b66eb7af79a1ef1a37d50f3bcd0ab", kill_on_drop: false }`
[INFO] [stdout] 9964ad4f476309f9c14bf6cc89bce4e1732b66eb7af79a1ef1a37d50f3bcd0ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1bd50d4315eb15970d395b6be5823f9384707693" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 52608cb78fd230bda5db3476b5a475a96f36517903df6b1fab78add193dccd19
[INFO] running `Command { std: "docker" "start" "-a" "52608cb78fd230bda5db3476b5a475a96f36517903df6b1fab78add193dccd19", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking num-complex v0.4.4
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking num v0.4.1
[INFO] [stderr]     Checking learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0284]: type annotations needed
[INFO] [stdout]   --> src/basic/type.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let guess = "42".parse().expect("Not a number!"); // 这个无法解析
[INFO] [stdout]    |         ^^^^^        ----- type must be known at this point
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `<_ as FromStr>::Err == _`
[INFO] [stdout] help: consider giving `guess` an explicit type
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let guess: /* Type */ = "42".parse().expect("Not a number!"); // 这个无法解析
[INFO] [stdout]    |              ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0284]: type annotations needed
[INFO] [stdout]   --> src/basic/type.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let guess = "42".parse().expect("Not a number!"); // 这个无法解析
[INFO] [stdout]    |         ^^^^^        ----- type must be known at this point
[INFO] [stdout]    |
[INFO] [stdout]    = note: cannot satisfy `<_ as FromStr>::Err == _`
[INFO] [stdout] help: consider giving `guess` an explicit type
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let guess: /* Type */ = "42".parse().expect("Not a number!"); // 这个无法解析
[INFO] [stdout]    |              ++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0284`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn` (bin "learn") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `learn` (bin "learn" test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "52608cb78fd230bda5db3476b5a475a96f36517903df6b1fab78add193dccd19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52608cb78fd230bda5db3476b5a475a96f36517903df6b1fab78add193dccd19", kill_on_drop: false }`
[INFO] [stdout] 52608cb78fd230bda5db3476b5a475a96f36517903df6b1fab78add193dccd19