[INFO] cloning repository acmumn/minnehack-blockchain-check-in [INFO] running `"git" "clone" "--bare" "git://github.com/acmumn/minnehack-blockchain-check-in.git" "work/cache/sources/gh/acmumn/minnehack-blockchain-check-in"` [INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/acmumn/minnehack-blockchain-check-in'... [INFO] running `"git" "clone" "work/cache/sources/gh/acmumn/minnehack-blockchain-check-in" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/acmumn/minnehack-blockchain-check-in"` [INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/acmumn/minnehack-blockchain-check-in'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/acmumn/minnehack-blockchain-check-in" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/acmumn/minnehack-blockchain-check-in"` [INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/acmumn/minnehack-blockchain-check-in'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] b75908ad2b87b7c31018b8e2e7f8df6aa3092831 [INFO] sha for GitHub repo acmumn/minnehack-blockchain-check-in: b75908ad2b87b7c31018b8e2e7f8df6aa3092831 [INFO] validating manifest of acmumn/minnehack-blockchain-check-in on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of acmumn/minnehack-blockchain-check-in on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049 [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing acmumn/minnehack-blockchain-check-in [INFO] removed workspace from acmumn/minnehack-blockchain-check-in [INFO] finished frobbing acmumn/minnehack-blockchain-check-in [INFO] frobbed toml for acmumn/minnehack-blockchain-check-in written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/acmumn/minnehack-blockchain-check-in/Cargo.toml [INFO] started frobbing acmumn/minnehack-blockchain-check-in [INFO] removed workspace from acmumn/minnehack-blockchain-check-in [INFO] finished frobbing acmumn/minnehack-blockchain-check-in [INFO] frobbed toml for acmumn/minnehack-blockchain-check-in written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/acmumn/minnehack-blockchain-check-in/Cargo.toml [INFO] crate acmumn/minnehack-blockchain-check-in already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] error: the lock file /mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/acmumn/minnehack-blockchain-check-in/Cargo.lock needs to be updated but --locked was passed to prevent this [INFO] the lockfile is outdated, regenerating it [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking acmumn/minnehack-blockchain-check-in against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008 [INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-3/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/acmumn/minnehack-blockchain-check-in:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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=forbid" "-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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] e1caf5dbf6ece76edfe95c7ba654e7cb4c0584d5bfe6e57765568b85e802f0ad [INFO] running `"docker" "start" "-a" "e1caf5dbf6ece76edfe95c7ba654e7cb4c0584d5bfe6e57765568b85e802f0ad"` [INFO] [stderr] Compiling arrayvec v0.4.11 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Checking iovec v0.1.2 [INFO] [stderr] Checking net2 v0.2.33 [INFO] [stderr] Checking num_cpus v1.10.1 [INFO] [stderr] Checking memchr v1.0.2 [INFO] [stderr] Checking serde_cbor v0.8.2 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Checking rust-crypto v0.2.36 [INFO] [stderr] Checking error-chain v0.10.0 [INFO] [stderr] Checking error-chain v0.11.0 [INFO] [stderr] Checking env_logger v0.5.13 [INFO] [stderr] Checking rand v0.6.5 [INFO] [stderr] Checking bytes v0.4.12 [INFO] [stderr] Checking nom v3.2.1 [INFO] [stderr] Checking pretty_env_logger v0.1.1 [INFO] [stderr] Checking mio v0.6.19 [INFO] [stderr] Checking dotenv v0.10.1 [INFO] [stderr] Checking quickcheck v0.6.2 [INFO] [stderr] Checking tokio-io v0.1.12 [INFO] [stderr] Checking mio-uds v0.6.7 [INFO] [stderr] Checking parking_lot_core v0.4.0 [INFO] [stderr] Checking crossbeam-epoch v0.7.1 [INFO] [stderr] Checking tokio-codec v0.1.1 [INFO] [stderr] Checking parking_lot v0.7.1 [INFO] [stderr] Checking crossbeam-deque v0.7.1 [INFO] [stderr] Checking tokio-threadpool v0.1.15 [INFO] [stderr] Checking tokio-reactor v0.1.9 [INFO] [stderr] Checking tokio-fs v0.1.6 [INFO] [stderr] Checking tokio-tcp v0.1.3 [INFO] [stderr] Checking tokio-udp v0.1.3 [INFO] [stderr] Checking tokio-uds v0.2.5 [INFO] [stderr] Checking tokio v0.1.22 [INFO] [stderr] Checking tokio-core v0.1.17 [INFO] [stderr] Checking minnehack-check-in v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/lib.rs:79:13 [INFO] [stderr] | [INFO] [stderr] 79 | let mut client = Client::new_with_opts( [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/lib.rs:79:13 [INFO] [stderr] | [INFO] [stderr] 79 | let mut client = Client::new_with_opts( [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 28.26s [INFO] running `"docker" "inspect" "e1caf5dbf6ece76edfe95c7ba654e7cb4c0584d5bfe6e57765568b85e802f0ad"` [INFO] running `"docker" "rm" "-f" "e1caf5dbf6ece76edfe95c7ba654e7cb4c0584d5bfe6e57765568b85e802f0ad"` [INFO] [stdout] e1caf5dbf6ece76edfe95c7ba654e7cb4c0584d5bfe6e57765568b85e802f0ad