[INFO] updating cached repository huwb/rust-rt
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/huwb/rust-rt
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/huwb/rust-rt" "work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/rust-rt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/rust-rt'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/huwb/rust-rt" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/huwb/rust-rt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/huwb/rust-rt'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 34c4b6019d92713f1f3adcb6336a82acdbff1ee8
[INFO] sha for GitHub repo huwb/rust-rt: 34c4b6019d92713f1f3adcb6336a82acdbff1ee8
[INFO] validating manifest of huwb/rust-rt on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of huwb/rust-rt on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing huwb/rust-rt
[INFO] finished frobbing huwb/rust-rt
[INFO] frobbed toml for huwb/rust-rt written to work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/rust-rt/Cargo.toml
[INFO] started frobbing huwb/rust-rt
[INFO] finished frobbing huwb/rust-rt
[INFO] frobbed toml for huwb/rust-rt written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/huwb/rust-rt/Cargo.toml
[INFO] crate huwb/rust-rt already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing huwb/rust-rt against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/rust-rt:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 977a30ad9655da4f8bd37a2d643e3ee7e343ae0aecfb96a6ca640787e6895907
[INFO] running `"docker" "start" "-a" "977a30ad9655da4f8bd37a2d643e3ee7e343ae0aecfb96a6ca640787e6895907"`
[INFO] [stderr]    Compiling time v0.1.39
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling simple-stopwatch v0.1.4
[INFO] [stderr]    Compiling rust-rt v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:253:21
[INFO] [stderr]     |
[INFO] [stderr] 253 |                 let mut xf = x as f32;
[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/main.rs:260:25
[INFO] [stderr]     |
[INFO] [stderr] 260 |                     let mut i = color(u, v, &mut rng);
[INFO] [stderr]     |                         ----^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:243:13
[INFO] [stderr]     |
[INFO] [stderr] 243 |         let mut yf = y as f32;
[INFO] [stderr]     |             ----^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:245:13
[INFO] [stderr]     |
[INFO] [stderr] 245 |         let mut row = Arc::clone(&&image[y]);
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.97s
[INFO] running `"docker" "inspect" "977a30ad9655da4f8bd37a2d643e3ee7e343ae0aecfb96a6ca640787e6895907"`
[INFO] running `"docker" "rm" "-f" "977a30ad9655da4f8bd37a2d643e3ee7e343ae0aecfb96a6ca640787e6895907"`
[INFO] [stdout] 977a30ad9655da4f8bd37a2d643e3ee7e343ae0aecfb96a6ca640787e6895907
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/rust-rt:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 5be2d92fe975514a7cca498320b2152769ce1bf8ba801e53cb63efc0b56ddb19
[INFO] running `"docker" "start" "-a" "5be2d92fe975514a7cca498320b2152769ce1bf8ba801e53cb63efc0b56ddb19"`
[INFO] [stderr]    Compiling rust-rt v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:253:21
[INFO] [stderr]     |
[INFO] [stderr] 253 |                 let mut xf = x as f32;
[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/main.rs:260:25
[INFO] [stderr]     |
[INFO] [stderr] 260 |                     let mut i = color(u, v, &mut rng);
[INFO] [stderr]     |                         ----^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:243:13
[INFO] [stderr]     |
[INFO] [stderr] 243 |         let mut yf = y as f32;
[INFO] [stderr]     |             ----^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:245:13
[INFO] [stderr]     |
[INFO] [stderr] 245 |         let mut row = Arc::clone(&&image[y]);
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.11s
[INFO] running `"docker" "inspect" "5be2d92fe975514a7cca498320b2152769ce1bf8ba801e53cb63efc0b56ddb19"`
[INFO] running `"docker" "rm" "-f" "5be2d92fe975514a7cca498320b2152769ce1bf8ba801e53cb63efc0b56ddb19"`
[INFO] [stdout] 5be2d92fe975514a7cca498320b2152769ce1bf8ba801e53cb63efc0b56ddb19
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/huwb/rust-rt:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 877d4cf0e07378714450fb07ddcc7739a1cd5b9190f55385f011cabd6f960fea
[INFO] running `"docker" "start" "-a" "877d4cf0e07378714450fb07ddcc7739a1cd5b9190f55385f011cabd6f960fea"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_rt-9a116c1b2417a216
[INFO] [stdout] running 3 tests
[INFO] [stdout] test threadpool::tests::create_then_join ... ok
[INFO] [stdout] test threadpool::tests::run_trivial_job ... ok
[INFO] [stdout] test threadpool::tests::zero_thread_count_panics ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "877d4cf0e07378714450fb07ddcc7739a1cd5b9190f55385f011cabd6f960fea"`
[INFO] running `"docker" "rm" "-f" "877d4cf0e07378714450fb07ddcc7739a1cd5b9190f55385f011cabd6f960fea"`
[INFO] [stdout] 877d4cf0e07378714450fb07ddcc7739a1cd5b9190f55385f011cabd6f960fea