[INFO] updating cached repository ZhouHansen/async_rust_playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ZhouHansen/async_rust_playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ZhouHansen/async_rust_playground" "work/ex/beta-1.38-1/sources/1.37.0/gh/ZhouHansen/async_rust_playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ZhouHansen/async_rust_playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ZhouHansen/async_rust_playground" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ZhouHansen/async_rust_playground"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ZhouHansen/async_rust_playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 35a57a71145390d68ca6d19ee16905543662d726
[INFO] sha for GitHub repo ZhouHansen/async_rust_playground: 35a57a71145390d68ca6d19ee16905543662d726
[INFO] validating manifest of ZhouHansen/async_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 ZhouHansen/async_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 ZhouHansen/async_rust_playground
[INFO] finished frobbing ZhouHansen/async_rust_playground
[INFO] frobbed toml for ZhouHansen/async_rust_playground written to work/ex/beta-1.38-1/sources/1.37.0/gh/ZhouHansen/async_rust_playground/Cargo.toml
[INFO] started frobbing ZhouHansen/async_rust_playground
[INFO] finished frobbing ZhouHansen/async_rust_playground
[INFO] frobbed toml for ZhouHansen/async_rust_playground written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ZhouHansen/async_rust_playground/Cargo.toml
[INFO] crate ZhouHansen/async_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 ZhouHansen/async_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/ZhouHansen/async_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] 9ec562dabe46f927a59196245fc79e79de2fd460d8c4a09b6d0929d452e3eb8e
[INFO] running `"docker" "start" "-a" "9ec562dabe46f927a59196245fc79e79de2fd460d8c4a09b6d0929d452e3eb8e"`
[INFO] [stderr]    Compiling async_rust_playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/task_exc.rs:24:19
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub task: Box<ToyTask + Send>,
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ToyTask + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.22s
[INFO] running `"docker" "inspect" "9ec562dabe46f927a59196245fc79e79de2fd460d8c4a09b6d0929d452e3eb8e"`
[INFO] running `"docker" "rm" "-f" "9ec562dabe46f927a59196245fc79e79de2fd460d8c4a09b6d0929d452e3eb8e"`
[INFO] [stdout] 9ec562dabe46f927a59196245fc79e79de2fd460d8c4a09b6d0929d452e3eb8e
[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/ZhouHansen/async_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] 323d4419a7f71ddf68a7c38d493ff12c44794d55e073117500ce79831367d940
[INFO] running `"docker" "start" "-a" "323d4419a7f71ddf68a7c38d493ff12c44794d55e073117500ce79831367d940"`
[INFO] [stderr]    Compiling async_rust_playground v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/task_exc.rs:24:19
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub task: Box<ToyTask + Send>,
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^ help: use `dyn`: `dyn ToyTask + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `"docker" "inspect" "323d4419a7f71ddf68a7c38d493ff12c44794d55e073117500ce79831367d940"`
[INFO] running `"docker" "rm" "-f" "323d4419a7f71ddf68a7c38d493ff12c44794d55e073117500ce79831367d940"`
[INFO] [stdout] 323d4419a7f71ddf68a7c38d493ff12c44794d55e073117500ce79831367d940
[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/ZhouHansen/async_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] 96b755a6bbb7706782fafaa9c75db0b50604875ae3f7b746c541e8f13275ead0
[INFO] running `"docker" "start" "-a" "96b755a6bbb7706782fafaa9c75db0b50604875ae3f7b746c541e8f13275ead0"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/async_rust_playground-0107b15c3c0b0b2f
[INFO] [stderr]      Running /opt/crater/target/debug/deps/async_rust_playground-ae3d13aa0835d1e8
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests async_rust_playground
[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] [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" "96b755a6bbb7706782fafaa9c75db0b50604875ae3f7b746c541e8f13275ead0"`
[INFO] running `"docker" "rm" "-f" "96b755a6bbb7706782fafaa9c75db0b50604875ae3f7b746c541e8f13275ead0"`
[INFO] [stdout] 96b755a6bbb7706782fafaa9c75db0b50604875ae3f7b746c541e8f13275ead0