[INFO] crate callback 0.0.1 is already in cache
[INFO] extracting crate callback 0.0.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/callback/0.0.1
[INFO] extracting crate callback 0.0.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/callback/0.0.1
[INFO] validating manifest of callback-0.0.1 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 callback-0.0.1 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 callback-0.0.1
[INFO] finished frobbing callback-0.0.1
[INFO] frobbed toml for callback-0.0.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/callback/0.0.1/Cargo.toml
[INFO] started frobbing callback-0.0.1
[INFO] finished frobbing callback-0.0.1
[INFO] frobbed toml for callback-0.0.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/callback/0.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 callback-0.0.1 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/callback/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 61cae7ad98e148b59c39fefcee3341d84be3a41358b97eacc456b4a40f63c0ac
[INFO] running `"docker" "start" "-a" "61cae7ad98e148b59c39fefcee3341d84be3a41358b97eacc456b4a40f63c0ac"`
[INFO] [stderr]    Compiling callback v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/lib.rs:3:51
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub static mut CALLBACKS: Option<HashMap<i32, Box<Fn(i32)>>> = None;
[INFO] [stderr]   |                                                   ^^^^^^^ help: use `dyn`: `dyn Fn(i32)`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `"docker" "inspect" "61cae7ad98e148b59c39fefcee3341d84be3a41358b97eacc456b4a40f63c0ac"`
[INFO] running `"docker" "rm" "-f" "61cae7ad98e148b59c39fefcee3341d84be3a41358b97eacc456b4a40f63c0ac"`
[INFO] [stdout] 61cae7ad98e148b59c39fefcee3341d84be3a41358b97eacc456b4a40f63c0ac
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/callback/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1a701df9d984096633f820930c4d7a5b1c458260be652e9df5d464916033e2eb
[INFO] running `"docker" "start" "-a" "1a701df9d984096633f820930c4d7a5b1c458260be652e9df5d464916033e2eb"`
[INFO] [stderr]    Compiling callback v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/lib.rs:3:51
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub static mut CALLBACKS: Option<HashMap<i32, Box<Fn(i32)>>> = None;
[INFO] [stderr]   |                                                   ^^^^^^^ help: use `dyn`: `dyn Fn(i32)`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.42s
[INFO] running `"docker" "inspect" "1a701df9d984096633f820930c4d7a5b1c458260be652e9df5d464916033e2eb"`
[INFO] running `"docker" "rm" "-f" "1a701df9d984096633f820930c4d7a5b1c458260be652e9df5d464916033e2eb"`
[INFO] [stdout] 1a701df9d984096633f820930c4d7a5b1c458260be652e9df5d464916033e2eb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/callback/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 536d41ae45ce5b67e6746f34277539c8c66ddea5831a02513f9b1a1ab6d41d48
[INFO] running `"docker" "start" "-a" "536d41ae45ce5b67e6746f34277539c8c66ddea5831a02513f9b1a1ab6d41d48"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/callback-0a7989d36371f7f1
[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] [stderr]    Doc-tests callback
[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" "536d41ae45ce5b67e6746f34277539c8c66ddea5831a02513f9b1a1ab6d41d48"`
[INFO] running `"docker" "rm" "-f" "536d41ae45ce5b67e6746f34277539c8c66ddea5831a02513f9b1a1ab6d41d48"`
[INFO] [stdout] 536d41ae45ce5b67e6746f34277539c8c66ddea5831a02513f9b1a1ab6d41d48