[INFO] updating cached repository https://github.com/tsinghqs/Rust-Guessing-Game
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] abe36a1c1daa9e2b75662765d57e8371e4a1f099
[INFO] testing tsinghqs/Rust-Guessing-Game against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftsinghqs%2FRust-Guessing-Game" "work/builds/worker-6/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tsinghqs/Rust-Guessing-Game on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/tsinghqs/Rust-Guessing-Game
[INFO] finished tweaking git repo https://github.com/tsinghqs/Rust-Guessing-Game
[INFO] tweaked toml for git repo https://github.com/tsinghqs/Rust-Guessing-Game written to work/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/tsinghqs/Rust-Guessing-Game already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 277585ceeb21f5747d21eaf31609d5bc37a7193ccb9833b172e1eabdd908e0ea
[INFO] running `"docker" "start" "-a" "277585ceeb21f5747d21eaf31609d5bc37a7193ccb9833b172e1eabdd908e0ea"`
[INFO] [stderr]    Compiling rand v0.5.1
[INFO] [stderr]    Compiling RustPractice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: crate `RustPractice` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `rust_practice`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.75s
[INFO] running `"docker" "inspect" "277585ceeb21f5747d21eaf31609d5bc37a7193ccb9833b172e1eabdd908e0ea"`
[INFO] running `"docker" "rm" "-f" "277585ceeb21f5747d21eaf31609d5bc37a7193ccb9833b172e1eabdd908e0ea"`
[INFO] [stdout] 277585ceeb21f5747d21eaf31609d5bc37a7193ccb9833b172e1eabdd908e0ea
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] da334bd9bc05b5d1b9e8e7eb3e8e66f210f5c8a5d2e0777488db913efb9159f3
[INFO] running `"docker" "start" "-a" "da334bd9bc05b5d1b9e8e7eb3e8e66f210f5c8a5d2e0777488db913efb9159f3"`
[INFO] [stderr]    Compiling RustPractice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: crate `RustPractice` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `rust_practice`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `"docker" "inspect" "da334bd9bc05b5d1b9e8e7eb3e8e66f210f5c8a5d2e0777488db913efb9159f3"`
[INFO] running `"docker" "rm" "-f" "da334bd9bc05b5d1b9e8e7eb3e8e66f210f5c8a5d2e0777488db913efb9159f3"`
[INFO] [stdout] da334bd9bc05b5d1b9e8e7eb3e8e66f210f5c8a5d2e0777488db913efb9159f3
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] 2e42e1ed7957b98f412c932a203aa5671ff2fef6d08c70b30a098a14ba20ec5f
[INFO] running `"docker" "start" "-a" "2e42e1ed7957b98f412c932a203aa5671ff2fef6d08c70b30a098a14ba20ec5f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/RustPractice-1597db276a0e1448
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "2e42e1ed7957b98f412c932a203aa5671ff2fef6d08c70b30a098a14ba20ec5f"`
[INFO] running `"docker" "rm" "-f" "2e42e1ed7957b98f412c932a203aa5671ff2fef6d08c70b30a098a14ba20ec5f"`
[INFO] [stdout] 2e42e1ed7957b98f412c932a203aa5671ff2fef6d08c70b30a098a14ba20ec5f