[INFO] updating cached repository hellow554/r5
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/hellow554/r5
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/hellow554/r5" "work/ex/beta-1.38-1/sources/1.37.0/gh/hellow554/r5"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/hellow554/r5'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/hellow554/r5" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hellow554/r5"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hellow554/r5'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 92cbd040f383e6991d56f874fd3df468c8176565
[INFO] sha for GitHub repo hellow554/r5: 92cbd040f383e6991d56f874fd3df468c8176565
[INFO] validating manifest of hellow554/r5 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 hellow554/r5 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 hellow554/r5
[INFO] finished frobbing hellow554/r5
[INFO] frobbed toml for hellow554/r5 written to work/ex/beta-1.38-1/sources/1.37.0/gh/hellow554/r5/Cargo.toml
[INFO] started frobbing hellow554/r5
[INFO] finished frobbing hellow554/r5
[INFO] frobbed toml for hellow554/r5 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/hellow554/r5/Cargo.toml
[INFO] crate hellow554/r5 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 hellow554/r5 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hellow554/r5:/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] 7719cdbff018cda02246aabb9df44ae33de3f533606fad952e43ac35501ed297
[INFO] running `"docker" "start" "-a" "7719cdbff018cda02246aabb9df44ae33de3f533606fad952e43ac35501ed297"`
[INFO] [stderr]    Compiling libc v0.2.50
[INFO] [stderr]    Compiling syn v0.15.29
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling backtrace v0.3.14
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling r5 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `File`, `self`
[INFO] [stderr]  --> src/main.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fs::{self, File};
[INFO] [stderr]   |               ^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `E`
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     E,
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.09s
[INFO] running `"docker" "inspect" "7719cdbff018cda02246aabb9df44ae33de3f533606fad952e43ac35501ed297"`
[INFO] running `"docker" "rm" "-f" "7719cdbff018cda02246aabb9df44ae33de3f533606fad952e43ac35501ed297"`
[INFO] [stdout] 7719cdbff018cda02246aabb9df44ae33de3f533606fad952e43ac35501ed297
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hellow554/r5:/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] a377036c47de4389993f290a794abc490e315120b9cd9c1289ab2ee5612d75a6
[INFO] running `"docker" "start" "-a" "a377036c47de4389993f290a794abc490e315120b9cd9c1289ab2ee5612d75a6"`
[INFO] [stderr]    Compiling r5 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused imports: `File`, `self`
[INFO] [stderr]  --> src/main.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fs::{self, File};
[INFO] [stderr]   |               ^^^^  ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `E`
[INFO] [stderr]   --> src/main.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     E,
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "a377036c47de4389993f290a794abc490e315120b9cd9c1289ab2ee5612d75a6"`
[INFO] running `"docker" "rm" "-f" "a377036c47de4389993f290a794abc490e315120b9cd9c1289ab2ee5612d75a6"`
[INFO] [stdout] a377036c47de4389993f290a794abc490e315120b9cd9c1289ab2ee5612d75a6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/hellow554/r5:/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] 91e17c6b50c06c55b00a44e477787a3e0f57610306d5e38f7fc8557df0a4337b
[INFO] running `"docker" "start" "-a" "91e17c6b50c06c55b00a44e477787a3e0f57610306d5e38f7fc8557df0a4337b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/r5-c6d5188e1bf77745
[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" "91e17c6b50c06c55b00a44e477787a3e0f57610306d5e38f7fc8557df0a4337b"`
[INFO] running `"docker" "rm" "-f" "91e17c6b50c06c55b00a44e477787a3e0f57610306d5e38f7fc8557df0a4337b"`
[INFO] [stdout] 91e17c6b50c06c55b00a44e477787a3e0f57610306d5e38f7fc8557df0a4337b