[INFO] updating cached repository tomc1998/specs_test
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tomc1998/specs_test
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tomc1998/specs_test" "work/ex/beta-1.38-1/sources/1.37.0/gh/tomc1998/specs_test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tomc1998/specs_test'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tomc1998/specs_test" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tomc1998/specs_test"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tomc1998/specs_test'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7c82dd36d319a3f4e0bf57a787663baa067001c5
[INFO] sha for GitHub repo tomc1998/specs_test: 7c82dd36d319a3f4e0bf57a787663baa067001c5
[INFO] validating manifest of tomc1998/specs_test 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 tomc1998/specs_test 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 tomc1998/specs_test
[INFO] finished frobbing tomc1998/specs_test
[INFO] frobbed toml for tomc1998/specs_test written to work/ex/beta-1.38-1/sources/1.37.0/gh/tomc1998/specs_test/Cargo.toml
[INFO] started frobbing tomc1998/specs_test
[INFO] finished frobbing tomc1998/specs_test
[INFO] frobbed toml for tomc1998/specs_test written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tomc1998/specs_test/Cargo.toml
[INFO] crate tomc1998/specs_test 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 tomc1998/specs_test 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tomc1998/specs_test:/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] fdbf8de1811211aaf1b352dc280f9b3421ca777f71c873823780425e12960c50
[INFO] running `"docker" "start" "-a" "fdbf8de1811211aaf1b352dc280f9b3421ca777f71c873823780425e12960c50"`
[INFO] [stderr]    Compiling time v0.1.37
[INFO] [stderr]    Compiling backtrace-sys v0.1.10
[INFO] [stderr]    Compiling cgmath v0.14.1
[INFO] [stderr]    Compiling glium v0.16.0
[INFO] [stderr]    Compiling pulse v0.5.3
[INFO] [stderr]    Compiling specs v0.8.1
[INFO] [stderr]    Compiling backtrace v0.2.3
[INFO] [stderr]    Compiling specs_test v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]   --> src/main.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 | use rand::{Rng, StdRng};
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rng`
[INFO] [stderr]   --> src/main.rs:52:11
[INFO] [stderr]    |
[INFO] [stderr] 52 |   let mut rng = StdRng::new().unwrap();
[INFO] [stderr]    |           ^^^ help: consider prefixing with an underscore: `_rng`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:52:7
[INFO] [stderr]    |
[INFO] [stderr] 52 |   let mut rng = StdRng::new().unwrap();
[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 51.85s
[INFO] running `"docker" "inspect" "fdbf8de1811211aaf1b352dc280f9b3421ca777f71c873823780425e12960c50"`
[INFO] running `"docker" "rm" "-f" "fdbf8de1811211aaf1b352dc280f9b3421ca777f71c873823780425e12960c50"`
[INFO] [stdout] fdbf8de1811211aaf1b352dc280f9b3421ca777f71c873823780425e12960c50
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tomc1998/specs_test:/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] 5cb27d822c60aeb1452f73de12142c7a67c842aa439ae81c3a4b57bbfb735a88
[INFO] running `"docker" "start" "-a" "5cb27d822c60aeb1452f73de12142c7a67c842aa439ae81c3a4b57bbfb735a88"`
[INFO] [stderr]    Compiling specs_test v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `Rng`
[INFO] [stderr]   --> src/main.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 | use rand::{Rng, StdRng};
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rng`
[INFO] [stderr]   --> src/main.rs:52:11
[INFO] [stderr]    |
[INFO] [stderr] 52 |   let mut rng = StdRng::new().unwrap();
[INFO] [stderr]    |           ^^^ help: consider prefixing with an underscore: `_rng`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:52:7
[INFO] [stderr]    |
[INFO] [stderr] 52 |   let mut rng = StdRng::new().unwrap();
[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 1.37s
[INFO] running `"docker" "inspect" "5cb27d822c60aeb1452f73de12142c7a67c842aa439ae81c3a4b57bbfb735a88"`
[INFO] running `"docker" "rm" "-f" "5cb27d822c60aeb1452f73de12142c7a67c842aa439ae81c3a4b57bbfb735a88"`
[INFO] [stdout] 5cb27d822c60aeb1452f73de12142c7a67c842aa439ae81c3a4b57bbfb735a88
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/tomc1998/specs_test:/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] aa65b281a4f4dc2951518e67c63e27a34dad10dee4a7a5fe139faf83e6632a21
[INFO] running `"docker" "start" "-a" "aa65b281a4f4dc2951518e67c63e27a34dad10dee4a7a5fe139faf83e6632a21"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.42s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/specs_test-6b71dadcf034ab96
[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" "aa65b281a4f4dc2951518e67c63e27a34dad10dee4a7a5fe139faf83e6632a21"`
[INFO] running `"docker" "rm" "-f" "aa65b281a4f4dc2951518e67c63e27a34dad10dee4a7a5fe139faf83e6632a21"`
[INFO] [stdout] aa65b281a4f4dc2951518e67c63e27a34dad10dee4a7a5fe139faf83e6632a21