[INFO] updating cached repository tsinghqs/Rust-Guessing-Game
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tsinghqs/Rust-Guessing-Game
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tsinghqs/Rust-Guessing-Game" "work/ex/beta-1.38-1/sources/1.37.0/gh/tsinghqs/Rust-Guessing-Game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tsinghqs/Rust-Guessing-Game'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tsinghqs/Rust-Guessing-Game" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tsinghqs/Rust-Guessing-Game"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tsinghqs/Rust-Guessing-Game'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] abe36a1c1daa9e2b75662765d57e8371e4a1f099
[INFO] sha for GitHub repo tsinghqs/Rust-Guessing-Game: abe36a1c1daa9e2b75662765d57e8371e4a1f099
[INFO] validating manifest of tsinghqs/Rust-Guessing-Game on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tsinghqs/Rust-Guessing-Game on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tsinghqs/Rust-Guessing-Game
[INFO] finished frobbing tsinghqs/Rust-Guessing-Game
[INFO] frobbed toml for tsinghqs/Rust-Guessing-Game written to work/ex/beta-1.38-1/sources/1.37.0/gh/tsinghqs/Rust-Guessing-Game/Cargo.toml
[INFO] started frobbing tsinghqs/Rust-Guessing-Game
[INFO] finished frobbing tsinghqs/Rust-Guessing-Game
[INFO] frobbed toml for tsinghqs/Rust-Guessing-Game written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tsinghqs/Rust-Guessing-Game/Cargo.toml
[INFO] crate tsinghqs/Rust-Guessing-Game already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tsinghqs/Rust-Guessing-Game against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tsinghqs/Rust-Guessing-Game:/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 4e7e4b676bf6d9a264fc6933dee06e178ab7afe51cd47dd8707631376261f43e
[INFO] running `"docker" "start" "-a" "4e7e4b676bf6d9a264fc6933dee06e178ab7afe51cd47dd8707631376261f43e"`
[INFO] [stderr]    Compiling rand v0.5.1
[INFO] [stderr]    Compiling RustPractice v0.1.0 (/opt/crater/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 3.45s
[INFO] running `"docker" "inspect" "4e7e4b676bf6d9a264fc6933dee06e178ab7afe51cd47dd8707631376261f43e"`
[INFO] running `"docker" "rm" "-f" "4e7e4b676bf6d9a264fc6933dee06e178ab7afe51cd47dd8707631376261f43e"`
[INFO] [stdout] 4e7e4b676bf6d9a264fc6933dee06e178ab7afe51cd47dd8707631376261f43e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tsinghqs/Rust-Guessing-Game:/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 586ef53de3dca71b8b6f882e8b00d978a45abc0f03e60ecf21144cb3ae174cb5
[INFO] running `"docker" "start" "-a" "586ef53de3dca71b8b6f882e8b00d978a45abc0f03e60ecf21144cb3ae174cb5"`
[INFO] [stderr]    Compiling RustPractice v0.1.0 (/opt/crater/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 0.67s
[INFO] running `"docker" "inspect" "586ef53de3dca71b8b6f882e8b00d978a45abc0f03e60ecf21144cb3ae174cb5"`
[INFO] running `"docker" "rm" "-f" "586ef53de3dca71b8b6f882e8b00d978a45abc0f03e60ecf21144cb3ae174cb5"`
[INFO] [stdout] 586ef53de3dca71b8b6f882e8b00d978a45abc0f03e60ecf21144cb3ae174cb5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tsinghqs/Rust-Guessing-Game:/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=warn" "-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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 65d154e29014099c19e6ce800745328b57b559a59a110e5bfb25bcf1e072dddf
[INFO] running `"docker" "start" "-a" "65d154e29014099c19e6ce800745328b57b559a59a110e5bfb25bcf1e072dddf"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/RustPractice-4aa8c2454e0aa75b
[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" "65d154e29014099c19e6ce800745328b57b559a59a110e5bfb25bcf1e072dddf"`
[INFO] running `"docker" "rm" "-f" "65d154e29014099c19e6ce800745328b57b559a59a110e5bfb25bcf1e072dddf"`
[INFO] [stdout] 65d154e29014099c19e6ce800745328b57b559a59a110e5bfb25bcf1e072dddf