[INFO] cloning repository zhaihj/rust-play-ground
[INFO] running `"git" "clone" "--bare" "git://github.com/zhaihj/rust-play-ground.git" "work/cache/sources/gh/zhaihj/rust-play-ground"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/zhaihj/rust-play-ground'...
[INFO] running `"git" "clone" "work/cache/sources/gh/zhaihj/rust-play-ground" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/zhaihj/rust-play-ground"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/zhaihj/rust-play-ground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zhaihj/rust-play-ground" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/zhaihj/rust-play-ground"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/zhaihj/rust-play-ground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7518e53f966e8c30644755ca289ee59c1d0e0a21
[INFO] sha for GitHub repo zhaihj/rust-play-ground: 7518e53f966e8c30644755ca289ee59c1d0e0a21
[INFO] validating manifest of zhaihj/rust-play-ground 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 zhaihj/rust-play-ground 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 zhaihj/rust-play-ground
[INFO] finished frobbing zhaihj/rust-play-ground
[INFO] frobbed toml for zhaihj/rust-play-ground written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/zhaihj/rust-play-ground/Cargo.toml
[INFO] started frobbing zhaihj/rust-play-ground
[INFO] finished frobbing zhaihj/rust-play-ground
[INFO] frobbed toml for zhaihj/rust-play-ground written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/zhaihj/rust-play-ground/Cargo.toml
[INFO] crate zhaihj/rust-play-ground 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]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.19
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] checking zhaihj/rust-play-ground against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-2/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/zhaihj/rust-play-ground:/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" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 05c7a83300dcb8d42cb601e264f9770346c8e8bbd9c7f21729ebeae982dfacc5
[INFO] running `"docker" "start" "-a" "05c7a83300dcb8d42cb601e264f9770346c8e8bbd9c7f21729ebeae982dfacc5"`
[INFO] [stderr]     Checking libc v0.2.19
[INFO] [stderr]     Checking rustc-serialize v0.3.22
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking csv v0.15.0
[INFO] [stderr]     Checking csv-read-test v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/bin/read-csv-matrix.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     f.read_to_string(&mut s);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]  --> src/bin/read-csv-matrix.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     f.read_to_string(&mut s);
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.95s
[INFO] running `"docker" "inspect" "05c7a83300dcb8d42cb601e264f9770346c8e8bbd9c7f21729ebeae982dfacc5"`
[INFO] running `"docker" "rm" "-f" "05c7a83300dcb8d42cb601e264f9770346c8e8bbd9c7f21729ebeae982dfacc5"`
[INFO] [stdout] 05c7a83300dcb8d42cb601e264f9770346c8e8bbd9c7f21729ebeae982dfacc5