[INFO] updating cached repository szhongren/rustbookv2
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/szhongren/rustbookv2
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/szhongren/rustbookv2" "work/ex/beta-1.38-1/sources/1.37.0/gh/szhongren/rustbookv2"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/szhongren/rustbookv2'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/szhongren/rustbookv2" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/szhongren/rustbookv2"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/szhongren/rustbookv2'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8534333cc27bf65741c823c98fcd03235b40ada7
[INFO] sha for GitHub repo szhongren/rustbookv2: 8534333cc27bf65741c823c98fcd03235b40ada7
[INFO] validating manifest of szhongren/rustbookv2 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 szhongren/rustbookv2 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 szhongren/rustbookv2
[INFO] finished frobbing szhongren/rustbookv2
[INFO] frobbed toml for szhongren/rustbookv2 written to work/ex/beta-1.38-1/sources/1.37.0/gh/szhongren/rustbookv2/Cargo.toml
[INFO] started frobbing szhongren/rustbookv2
[INFO] finished frobbing szhongren/rustbookv2
[INFO] frobbed toml for szhongren/rustbookv2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/szhongren/rustbookv2/Cargo.toml
[INFO] crate szhongren/rustbookv2 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 szhongren/rustbookv2 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/szhongren/rustbookv2:/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] e607b96a746bb8890deb19eaac06f0ada12df55a640c58d9a4ca709b347d27d2
[INFO] running `"docker" "start" "-a" "e607b96a746bb8890deb19eaac06f0ada12df55a640c58d9a4ca709b347d27d2"`
[INFO] [stderr]    Compiling rustbook v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `PartialOrd` is imported redundantly
[INFO] [stderr]   --> src/section10.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     use std::cmp::PartialOrd;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.33s
[INFO] running `"docker" "inspect" "e607b96a746bb8890deb19eaac06f0ada12df55a640c58d9a4ca709b347d27d2"`
[INFO] running `"docker" "rm" "-f" "e607b96a746bb8890deb19eaac06f0ada12df55a640c58d9a4ca709b347d27d2"`
[INFO] [stdout] e607b96a746bb8890deb19eaac06f0ada12df55a640c58d9a4ca709b347d27d2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/szhongren/rustbookv2:/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] 8bc37b14564303e1976a32458912fe3f3ac4702ceb63643d5b3c35f516f4e72e
[INFO] running `"docker" "start" "-a" "8bc37b14564303e1976a32458912fe3f3ac4702ceb63643d5b3c35f516f4e72e"`
[INFO] [stderr]    Compiling rustbook v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `PartialOrd` is imported redundantly
[INFO] [stderr]   --> src/section10.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |     use std::cmp::PartialOrd;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `"docker" "inspect" "8bc37b14564303e1976a32458912fe3f3ac4702ceb63643d5b3c35f516f4e72e"`
[INFO] running `"docker" "rm" "-f" "8bc37b14564303e1976a32458912fe3f3ac4702ceb63643d5b3c35f516f4e72e"`
[INFO] [stdout] 8bc37b14564303e1976a32458912fe3f3ac4702ceb63643d5b3c35f516f4e72e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/szhongren/rustbookv2:/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] 8d5ed80584ac893e9be8fcae834099d220535f5d47a5963ef6bef6f20b9eecfc
[INFO] running `"docker" "start" "-a" "8d5ed80584ac893e9be8fcae834099d220535f5d47a5963ef6bef6f20b9eecfc"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rustbook-1417f65fe4b1121f
[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" "8d5ed80584ac893e9be8fcae834099d220535f5d47a5963ef6bef6f20b9eecfc"`
[INFO] running `"docker" "rm" "-f" "8d5ed80584ac893e9be8fcae834099d220535f5d47a5963ef6bef6f20b9eecfc"`
[INFO] [stdout] 8d5ed80584ac893e9be8fcae834099d220535f5d47a5963ef6bef6f20b9eecfc