[INFO] updating cached repository mfeckie/rusty-todo
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mfeckie/rusty-todo
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mfeckie/rusty-todo" "work/ex/beta-1.37-6/sources/1.36.0/gh/mfeckie/rusty-todo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/mfeckie/rusty-todo'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mfeckie/rusty-todo" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mfeckie/rusty-todo"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mfeckie/rusty-todo'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 51585a841811903ec97fbd2bc912a689a26d18fc
[INFO] sha for GitHub repo mfeckie/rusty-todo: 51585a841811903ec97fbd2bc912a689a26d18fc
[INFO] validating manifest of mfeckie/rusty-todo on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mfeckie/rusty-todo on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mfeckie/rusty-todo
[INFO] finished frobbing mfeckie/rusty-todo
[INFO] frobbed toml for mfeckie/rusty-todo written to work/ex/beta-1.37-6/sources/1.36.0/gh/mfeckie/rusty-todo/Cargo.toml
[INFO] started frobbing mfeckie/rusty-todo
[INFO] finished frobbing mfeckie/rusty-todo
[INFO] frobbed toml for mfeckie/rusty-todo written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/mfeckie/rusty-todo/Cargo.toml
[INFO] crate mfeckie/rusty-todo already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/mfeckie/rusty-todo/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing mfeckie/rusty-todo against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/mfeckie/rusty-todo:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 8576a3319870b56e1c6d9c289576f1d0ee4060b2abaf52c7988aa3a39574025b
[INFO] running `"docker" "start" "-a" "8576a3319870b56e1c6d9c289576f1d0ee4060b2abaf52c7988aa3a39574025b"`
[INFO] [stderr]    Compiling todo v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io::Error`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `"docker" "inspect" "8576a3319870b56e1c6d9c289576f1d0ee4060b2abaf52c7988aa3a39574025b"`
[INFO] running `"docker" "rm" "-f" "8576a3319870b56e1c6d9c289576f1d0ee4060b2abaf52c7988aa3a39574025b"`
[INFO] [stdout] 8576a3319870b56e1c6d9c289576f1d0ee4060b2abaf52c7988aa3a39574025b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/mfeckie/rusty-todo:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 06e7ac9253d4b495264e69c5a765610cc3221d4cc15ea68a724d0b67706daf01
[INFO] running `"docker" "start" "-a" "06e7ac9253d4b495264e69c5a765610cc3221d4cc15ea68a724d0b67706daf01"`
[INFO] [stderr]    Compiling todo v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::io::Error`
[INFO] [stderr]  --> src/main.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::io::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.27s
[INFO] running `"docker" "inspect" "06e7ac9253d4b495264e69c5a765610cc3221d4cc15ea68a724d0b67706daf01"`
[INFO] running `"docker" "rm" "-f" "06e7ac9253d4b495264e69c5a765610cc3221d4cc15ea68a724d0b67706daf01"`
[INFO] [stdout] 06e7ac9253d4b495264e69c5a765610cc3221d4cc15ea68a724d0b67706daf01
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/mfeckie/rusty-todo:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] d6998848f79abda3d08734947e38ee02a1b73fc1c5e4821c45059199cecf8ca6
[INFO] running `"docker" "start" "-a" "d6998848f79abda3d08734947e38ee02a1b73fc1c5e4821c45059199cecf8ca6"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/todo-b09b1234604b1ca0
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test add_a_task ... ok
[INFO] [stdout] test create_a_new_task ... ok
[INFO] [stdout] test todo_collection ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d6998848f79abda3d08734947e38ee02a1b73fc1c5e4821c45059199cecf8ca6"`
[INFO] running `"docker" "rm" "-f" "d6998848f79abda3d08734947e38ee02a1b73fc1c5e4821c45059199cecf8ca6"`
[INFO] [stdout] d6998848f79abda3d08734947e38ee02a1b73fc1c5e4821c45059199cecf8ca6