[INFO] cloning repository https://github.com/amtf/hello_cargo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amtf/hello_cargo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famtf%2Fhello_cargo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famtf%2Fhello_cargo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 75d702ffba89ed84ba0b7acdac402dcfffe08312
[INFO] checking amtf/hello_cargo against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famtf%2Fhello_cargo" "/workspace/builds/worker-96/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-96/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/amtf/hello_cargo on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/amtf/hello_cargo
[INFO] finished tweaking git repo https://github.com/amtf/hello_cargo
[INFO] tweaked toml for git repo https://github.com/amtf/hello_cargo written to /workspace/builds/worker-96/source/Cargo.toml
[INFO] crate git repo https://github.com/amtf/hello_cargo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "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-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96810488fa5e34aa061c74464c1c120af402bd00d6017e3f81fc04eb7ff96bc7
[INFO] running `Command { std: "docker" "start" "-a" "96810488fa5e34aa061c74464c1c120af402bd00d6017e3f81fc04eb7ff96bc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96810488fa5e34aa061c74464c1c120af402bd00d6017e3f81fc04eb7ff96bc7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96810488fa5e34aa061c74464c1c120af402bd00d6017e3f81fc04eb7ff96bc7", kill_on_drop: false }`
[INFO] [stdout] 96810488fa5e34aa061c74464c1c120af402bd00d6017e3f81fc04eb7ff96bc7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-96/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bbb6b17e528ed3c676d18a456f83a726e240fe33dc2dde24db7b6038f119706
[INFO] running `Command { std: "docker" "start" "-a" "0bbb6b17e528ed3c676d18a456f83a726e240fe33dc2dde24db7b6038f119706", kill_on_drop: false }`
[INFO] [stderr]     Checking hello_cargo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed for `Option<T>`
[INFO] [stdout]  --> src/main.rs:6:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let num = None;
[INFO] [stdout]   |         --- consider giving `num` the explicit type `Option<T>`, with the type parameters specified
[INFO] [stdout] ...
[INFO] [stdout] 6 |         Some(x) if x < 5 => println!("less than five: {}", x),
[INFO] [stdout]   |              ^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 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 `hello_cargo` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0282]: type annotations needed for `Option<T>`
[INFO] [stdout]  --> src/main.rs:6:14
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let num = None;
[INFO] [stdout]   |         --- consider giving `num` the explicit type `Option<T>`, with the type parameters specified
[INFO] [stdout] ...
[INFO] [stdout] 6 |         Some(x) if x < 5 => println!("less than five: {}", x),
[INFO] [stdout]   |              ^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0bbb6b17e528ed3c676d18a456f83a726e240fe33dc2dde24db7b6038f119706", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bbb6b17e528ed3c676d18a456f83a726e240fe33dc2dde24db7b6038f119706", kill_on_drop: false }`
[INFO] [stdout] 0bbb6b17e528ed3c676d18a456f83a726e240fe33dc2dde24db7b6038f119706