[INFO] crate task 0.0.1 is already in cache
[INFO] extracting crate task 0.0.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/task/0.0.1
[INFO] extracting crate task 0.0.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/task/0.0.1
[INFO] validating manifest of task-0.0.1 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 task-0.0.1 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 task-0.0.1
[INFO] finished frobbing task-0.0.1
[INFO] frobbed toml for task-0.0.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/task/0.0.1/Cargo.toml
[INFO] started frobbing task-0.0.1
[INFO] finished frobbing task-0.0.1
[INFO] frobbed toml for task-0.0.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/task/0.0.1/Cargo.toml
[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] testing task-0.0.1 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/task/0.0.1:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 04d8dcc934ffd0322c9a8f66f3ed21863d2fb3c30e1c9aefb183ba12af0c337a
[INFO] running `"docker" "start" "-a" "04d8dcc934ffd0322c9a8f66f3ed21863d2fb3c30e1c9aefb183ba12af0c337a"`
[INFO] [stderr]    Compiling crontab v0.1.0
[INFO] [stderr]    Compiling task v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/task.rs:12:19
[INFO] [stderr]    |
[INFO] [stderr] 12 |   pub handle: Box<FnMut() + Send + Sync>, // TODO: Drop 'Sync' ?
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() + Send + Sync`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.55s
[INFO] running `"docker" "inspect" "04d8dcc934ffd0322c9a8f66f3ed21863d2fb3c30e1c9aefb183ba12af0c337a"`
[INFO] running `"docker" "rm" "-f" "04d8dcc934ffd0322c9a8f66f3ed21863d2fb3c30e1c9aefb183ba12af0c337a"`
[INFO] [stdout] 04d8dcc934ffd0322c9a8f66f3ed21863d2fb3c30e1c9aefb183ba12af0c337a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/task/0.0.1:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 9cee47db8a286b09aab8237511a59411db691d69d3c84376ea7dbad58ced04a6
[INFO] running `"docker" "start" "-a" "9cee47db8a286b09aab8237511a59411db691d69d3c84376ea7dbad58ced04a6"`
[INFO] [stderr]    Compiling task v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/task.rs:12:19
[INFO] [stderr]    |
[INFO] [stderr] 12 |   pub handle: Box<FnMut() + Send + Sync>, // TODO: Drop 'Sync' ?
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut() + Send + Sync`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.59s
[INFO] running `"docker" "inspect" "9cee47db8a286b09aab8237511a59411db691d69d3c84376ea7dbad58ced04a6"`
[INFO] running `"docker" "rm" "-f" "9cee47db8a286b09aab8237511a59411db691d69d3c84376ea7dbad58ced04a6"`
[INFO] [stdout] 9cee47db8a286b09aab8237511a59411db691d69d3c84376ea7dbad58ced04a6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/task/0.0.1:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 928105c000407e63f6a82f4a9f21229e69e1612db6e5b7d87b5a998d0bcaaf4f
[INFO] running `"docker" "start" "-a" "928105c000407e63f6a82f4a9f21229e69e1612db6e5b7d87b5a998d0bcaaf4f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/task-21002f6f22b0e16a
[INFO] [stderr]    Doc-tests task
[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] [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" "928105c000407e63f6a82f4a9f21229e69e1612db6e5b7d87b5a998d0bcaaf4f"`
[INFO] running `"docker" "rm" "-f" "928105c000407e63f6a82f4a9f21229e69e1612db6e5b7d87b5a998d0bcaaf4f"`
[INFO] [stdout] 928105c000407e63f6a82f4a9f21229e69e1612db6e5b7d87b5a998d0bcaaf4f