[INFO] updating cached repository grit96/rust-playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/grit96/rust-playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/grit96/rust-playground" "work/ex/beta-1.38-1/sources/1.37.0/gh/grit96/rust-playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/grit96/rust-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/grit96/rust-playground" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/grit96/rust-playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/grit96/rust-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c899a3559a2c63e4eea1c47d5909402b7567dd86
[INFO] sha for GitHub repo grit96/rust-playground: c899a3559a2c63e4eea1c47d5909402b7567dd86
[INFO] validating manifest of grit96/rust-playground 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 grit96/rust-playground 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 grit96/rust-playground
[INFO] finished frobbing grit96/rust-playground
[INFO] frobbed toml for grit96/rust-playground written to work/ex/beta-1.38-1/sources/1.37.0/gh/grit96/rust-playground/Cargo.toml
[INFO] started frobbing grit96/rust-playground
[INFO] finished frobbing grit96/rust-playground
[INFO] frobbed toml for grit96/rust-playground written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/grit96/rust-playground/Cargo.toml
[INFO] crate grit96/rust-playground 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 grit96/rust-playground 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/grit96/rust-playground:/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] e0aa08bfb55449377d04004eb3a6d638c6df423d0b870debde71429f6e5b0ea7
[INFO] running `"docker" "start" "-a" "e0aa08bfb55449377d04004eb3a6d638c6df423d0b870debde71429f6e5b0ea7"`
[INFO] [stderr]    Compiling playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/fibo.rs:13:27
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn fibo_iter() -> Box<Iterator<Item = i32>> {
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = i32>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/sudoku.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |         '0'...'9' => c.to_digit(10).unwrap() as u8,
[INFO] [stderr]    |            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(ellipsis_inclusive_range_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.03s
[INFO] running `"docker" "inspect" "e0aa08bfb55449377d04004eb3a6d638c6df423d0b870debde71429f6e5b0ea7"`
[INFO] running `"docker" "rm" "-f" "e0aa08bfb55449377d04004eb3a6d638c6df423d0b870debde71429f6e5b0ea7"`
[INFO] [stdout] e0aa08bfb55449377d04004eb3a6d638c6df423d0b870debde71429f6e5b0ea7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/grit96/rust-playground:/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] 22bf901f24fa213d9f53d1da5fc6bd79ee8c7c3229b9379cd9990ca0dba590a3
[INFO] running `"docker" "start" "-a" "22bf901f24fa213d9f53d1da5fc6bd79ee8c7c3229b9379cd9990ca0dba590a3"`
[INFO] [stderr]    Compiling playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/fibo.rs:13:27
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub fn fibo_iter() -> Box<Iterator<Item = i32>> {
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = i32>`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/sudoku.rs:22:12
[INFO] [stderr]    |
[INFO] [stderr] 22 |         '0'...'9' => c.to_digit(10).unwrap() as u8,
[INFO] [stderr]    |            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(ellipsis_inclusive_range_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
[INFO] running `"docker" "inspect" "22bf901f24fa213d9f53d1da5fc6bd79ee8c7c3229b9379cd9990ca0dba590a3"`
[INFO] running `"docker" "rm" "-f" "22bf901f24fa213d9f53d1da5fc6bd79ee8c7c3229b9379cd9990ca0dba590a3"`
[INFO] [stdout] 22bf901f24fa213d9f53d1da5fc6bd79ee8c7c3229b9379cd9990ca0dba590a3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/grit96/rust-playground:/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] 1668ebd26c10d4e6e3bc33ec3e9bb2e54a42fa3cc5e1cd611f11e110ba732456
[INFO] running `"docker" "start" "-a" "1668ebd26c10d4e6e3bc33ec3e9bb2e54a42fa3cc5e1cd611f11e110ba732456"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/playground-ae338ef3eaef561d
[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" "1668ebd26c10d4e6e3bc33ec3e9bb2e54a42fa3cc5e1cd611f11e110ba732456"`
[INFO] running `"docker" "rm" "-f" "1668ebd26c10d4e6e3bc33ec3e9bb2e54a42fa3cc5e1cd611f11e110ba732456"`
[INFO] [stdout] 1668ebd26c10d4e6e3bc33ec3e9bb2e54a42fa3cc5e1cd611f11e110ba732456