[INFO] crate sysfs-rs 0.0.12 is already in cache
[INFO] extracting crate sysfs-rs 0.0.12 into work/ex/beta-1.38-1/sources/1.37.0/reg/sysfs-rs/0.0.12
[INFO] extracting crate sysfs-rs 0.0.12 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/sysfs-rs/0.0.12
[INFO] validating manifest of sysfs-rs-0.0.12 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 sysfs-rs-0.0.12 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 sysfs-rs-0.0.12
[INFO] finished frobbing sysfs-rs-0.0.12
[INFO] frobbed toml for sysfs-rs-0.0.12 written to work/ex/beta-1.38-1/sources/1.37.0/reg/sysfs-rs/0.0.12/Cargo.toml
[INFO] started frobbing sysfs-rs-0.0.12
[INFO] finished frobbing sysfs-rs-0.0.12
[INFO] frobbed toml for sysfs-rs-0.0.12 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/sysfs-rs/0.0.12/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 sysfs-rs-0.0.12 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/sysfs-rs/0.0.12:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 8de97af9844392771d9e70eda5526166159b386b9d9e83a5cb5882dbd3f93920
[INFO] running `"docker" "start" "-a" "8de97af9844392771d9e70eda5526166159b386b9d9e83a5cb5882dbd3f93920"`
[INFO] [stderr]    Compiling sysfs-rs v0.0.12 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `core::str::<impl str>::trim` that must be used
[INFO] [stderr]   --> src/util.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 26 |                 s.trim();
[INFO] [stderr]    |                 ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this returns the trimmed string as a slice, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.65s
[INFO] running `"docker" "inspect" "8de97af9844392771d9e70eda5526166159b386b9d9e83a5cb5882dbd3f93920"`
[INFO] running `"docker" "rm" "-f" "8de97af9844392771d9e70eda5526166159b386b9d9e83a5cb5882dbd3f93920"`
[INFO] [stdout] 8de97af9844392771d9e70eda5526166159b386b9d9e83a5cb5882dbd3f93920
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/sysfs-rs/0.0.12:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 19e9e97ad8e843d7a0497b7a9b07258b7c7093b69ecb110968ac0494ff3d05be
[INFO] running `"docker" "start" "-a" "19e9e97ad8e843d7a0497b7a9b07258b7c7093b69ecb110968ac0494ff3d05be"`
[INFO] [stderr]    Compiling sysfs-rs v0.0.12 (/opt/crater/workdir)
[INFO] [stderr] warning: unused return value of `core::str::<impl str>::trim` that must be used
[INFO] [stderr]   --> src/util.rs:26:17
[INFO] [stderr]    |
[INFO] [stderr] 26 |                 s.trim();
[INFO] [stderr]    |                 ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this returns the trimmed string as a slice, without modifying the original
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `"docker" "inspect" "19e9e97ad8e843d7a0497b7a9b07258b7c7093b69ecb110968ac0494ff3d05be"`
[INFO] running `"docker" "rm" "-f" "19e9e97ad8e843d7a0497b7a9b07258b7c7093b69ecb110968ac0494ff3d05be"`
[INFO] [stdout] 19e9e97ad8e843d7a0497b7a9b07258b7c7093b69ecb110968ac0494ff3d05be
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/sysfs-rs/0.0.12:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 34d5593695ab562644d96e7e9f73f2464005cc3b2dcdc2797010277df19f4969
[INFO] running `"docker" "start" "-a" "34d5593695ab562644d96e7e9f73f2464005cc3b2dcdc2797010277df19f4969"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sysfs_rs-ac3c53949a364183
[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] [stderr]    Doc-tests sysfs-rs
[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" "34d5593695ab562644d96e7e9f73f2464005cc3b2dcdc2797010277df19f4969"`
[INFO] running `"docker" "rm" "-f" "34d5593695ab562644d96e7e9f73f2464005cc3b2dcdc2797010277df19f4969"`
[INFO] [stdout] 34d5593695ab562644d96e7e9f73f2464005cc3b2dcdc2797010277df19f4969