[INFO] updating cached repository ohira-ryoji/ruststudy
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ohira-ryoji/ruststudy
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ohira-ryoji/ruststudy" "work/ex/beta-1.38-1/sources/1.37.0/gh/ohira-ryoji/ruststudy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ohira-ryoji/ruststudy'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ohira-ryoji/ruststudy" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ohira-ryoji/ruststudy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ohira-ryoji/ruststudy'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 94e17609be4bed64895a29efb3afe4b07a436ea1
[INFO] sha for GitHub repo ohira-ryoji/ruststudy: 94e17609be4bed64895a29efb3afe4b07a436ea1
[INFO] validating manifest of ohira-ryoji/ruststudy 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 ohira-ryoji/ruststudy 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 ohira-ryoji/ruststudy
[INFO] finished frobbing ohira-ryoji/ruststudy
[INFO] frobbed toml for ohira-ryoji/ruststudy written to work/ex/beta-1.38-1/sources/1.37.0/gh/ohira-ryoji/ruststudy/Cargo.toml
[INFO] started frobbing ohira-ryoji/ruststudy
[INFO] finished frobbing ohira-ryoji/ruststudy
[INFO] frobbed toml for ohira-ryoji/ruststudy written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ohira-ryoji/ruststudy/Cargo.toml
[INFO] crate ohira-ryoji/ruststudy 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 ohira-ryoji/ruststudy 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/gh/ohira-ryoji/ruststudy:/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] dfbb9b50e00b1d32f44d0452301d9b2e54ed889b3dd608b65f44549b22d6818c
[INFO] running `"docker" "start" "-a" "dfbb9b50e00b1d32f44d0452301d9b2e54ed889b3dd608b65f44549b22d6818c"`
[INFO] [stderr]    Compiling study v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `y` is never read
[INFO] [stderr]  --> src/sample01.rs:4:17
[INFO] [stderr]   |
[INFO] [stderr] 4 |         let mut y = x;
[INFO] [stderr]   |                 ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `"docker" "inspect" "dfbb9b50e00b1d32f44d0452301d9b2e54ed889b3dd608b65f44549b22d6818c"`
[INFO] running `"docker" "rm" "-f" "dfbb9b50e00b1d32f44d0452301d9b2e54ed889b3dd608b65f44549b22d6818c"`
[INFO] [stdout] dfbb9b50e00b1d32f44d0452301d9b2e54ed889b3dd608b65f44549b22d6818c
[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/gh/ohira-ryoji/ruststudy:/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] de45f4a01a8d9486a7a72e9ba9a18b8f4a83324b13edccfba46bd2d497ea4f31
[INFO] running `"docker" "start" "-a" "de45f4a01a8d9486a7a72e9ba9a18b8f4a83324b13edccfba46bd2d497ea4f31"`
[INFO] [stderr]    Compiling study v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `y` is never read
[INFO] [stderr]  --> src/sample01.rs:4:17
[INFO] [stderr]   |
[INFO] [stderr] 4 |         let mut y = x;
[INFO] [stderr]   |                 ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `"docker" "inspect" "de45f4a01a8d9486a7a72e9ba9a18b8f4a83324b13edccfba46bd2d497ea4f31"`
[INFO] running `"docker" "rm" "-f" "de45f4a01a8d9486a7a72e9ba9a18b8f4a83324b13edccfba46bd2d497ea4f31"`
[INFO] [stdout] de45f4a01a8d9486a7a72e9ba9a18b8f4a83324b13edccfba46bd2d497ea4f31
[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/gh/ohira-ryoji/ruststudy:/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] 14c32e672ecd26850e2275566582a9f07da359e60b6c8804b5cd8cc7231d9509
[INFO] running `"docker" "start" "-a" "14c32e672ecd26850e2275566582a9f07da359e60b6c8804b5cd8cc7231d9509"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/study-7ce268beaf90c969
[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] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/study-b0aa5470b993f0c5
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests study
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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" "14c32e672ecd26850e2275566582a9f07da359e60b6c8804b5cd8cc7231d9509"`
[INFO] running `"docker" "rm" "-f" "14c32e672ecd26850e2275566582a9f07da359e60b6c8804b5cd8cc7231d9509"`
[INFO] [stdout] 14c32e672ecd26850e2275566582a9f07da359e60b6c8804b5cd8cc7231d9509