[INFO] updating cached repository calesce/yamb
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/calesce/yamb
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/calesce/yamb" "work/ex/beta-1.38-1/sources/1.37.0/gh/calesce/yamb"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/calesce/yamb'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/calesce/yamb" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/calesce/yamb"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/calesce/yamb'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6ba7d8652bf21bbc6e506a244290d43cd81b85fa
[INFO] sha for GitHub repo calesce/yamb: 6ba7d8652bf21bbc6e506a244290d43cd81b85fa
[INFO] validating manifest of calesce/yamb 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 calesce/yamb 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 calesce/yamb
[INFO] finished frobbing calesce/yamb
[INFO] frobbed toml for calesce/yamb written to work/ex/beta-1.38-1/sources/1.37.0/gh/calesce/yamb/Cargo.toml
[INFO] started frobbing calesce/yamb
[INFO] finished frobbing calesce/yamb
[INFO] frobbed toml for calesce/yamb written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/calesce/yamb/Cargo.toml
[INFO] crate calesce/yamb 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 calesce/yamb 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/calesce/yamb:/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] 8e685b4dd8d25ff1d92f64f687c79ba9ab1fddd3a96f697d8b1c3a2fcb7c306f
[INFO] running `"docker" "start" "-a" "8e685b4dd8d25ff1d92f64f687c79ba9ab1fddd3a96f697d8b1c3a2fcb7c306f"`
[INFO] [stderr]    Compiling yamb v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |     Ok((buffer))
[INFO] [stderr]    |        ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "8e685b4dd8d25ff1d92f64f687c79ba9ab1fddd3a96f697d8b1c3a2fcb7c306f"`
[INFO] running `"docker" "rm" "-f" "8e685b4dd8d25ff1d92f64f687c79ba9ab1fddd3a96f697d8b1c3a2fcb7c306f"`
[INFO] [stdout] 8e685b4dd8d25ff1d92f64f687c79ba9ab1fddd3a96f697d8b1c3a2fcb7c306f
[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/calesce/yamb:/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] 9f2378de75610f2f4ba7bb47456a1554de91c6f000feea409bff2699318dee9a
[INFO] running `"docker" "start" "-a" "9f2378de75610f2f4ba7bb47456a1554de91c6f000feea409bff2699318dee9a"`
[INFO] [stderr]    Compiling yamb v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]   --> src/main.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |     Ok((buffer))
[INFO] [stderr]    |        ^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `"docker" "inspect" "9f2378de75610f2f4ba7bb47456a1554de91c6f000feea409bff2699318dee9a"`
[INFO] running `"docker" "rm" "-f" "9f2378de75610f2f4ba7bb47456a1554de91c6f000feea409bff2699318dee9a"`
[INFO] [stdout] 9f2378de75610f2f4ba7bb47456a1554de91c6f000feea409bff2699318dee9a
[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/calesce/yamb:/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] b8dcd20cc842278ace5eb108635be795992c9659c000cfab083aa79b8b46584b
[INFO] running `"docker" "start" "-a" "b8dcd20cc842278ace5eb108635be795992c9659c000cfab083aa79b8b46584b"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/yamb-f3814ddf42404a8f
[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" "b8dcd20cc842278ace5eb108635be795992c9659c000cfab083aa79b8b46584b"`
[INFO] running `"docker" "rm" "-f" "b8dcd20cc842278ace5eb108635be795992c9659c000cfab083aa79b8b46584b"`
[INFO] [stdout] b8dcd20cc842278ace5eb108635be795992c9659c000cfab083aa79b8b46584b