[INFO] crate rustracing 0.2.0 is already in cache
[INFO] extracting crate rustracing 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/rustracing/0.2.0
[INFO] extracting crate rustracing 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustracing/0.2.0
[INFO] validating manifest of rustracing-0.2.0 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 rustracing-0.2.0 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 rustracing-0.2.0
[INFO] finished frobbing rustracing-0.2.0
[INFO] frobbed toml for rustracing-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rustracing/0.2.0/Cargo.toml
[INFO] started frobbing rustracing-0.2.0
[INFO] finished frobbing rustracing-0.2.0
[INFO] frobbed toml for rustracing-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustracing/0.2.0/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 rustracing-0.2.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustracing/0.2.0:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 36f9edc305d963fc8f8068c193d5156434628fd48a523762d8a98a9123ae0a2a
[INFO] running `"docker" "start" "-a" "36f9edc305d963fc8f8068c193d5156434628fd48a523762d8a98a9123ae0a2a"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling trackable_derive v0.1.2
[INFO] [stderr]    Compiling trackable v0.2.23
[INFO] [stderr]    Compiling rustracing v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sampler.rs:50:30
[INFO] [stderr]    |
[INFO] [stderr] 50 | pub type BoxSampler<T> = Box<Sampler<T> + Send + Sync + 'static>;
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Sampler<T> + Send + Sync + 'static`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.78s
[INFO] running `"docker" "inspect" "36f9edc305d963fc8f8068c193d5156434628fd48a523762d8a98a9123ae0a2a"`
[INFO] running `"docker" "rm" "-f" "36f9edc305d963fc8f8068c193d5156434628fd48a523762d8a98a9123ae0a2a"`
[INFO] [stdout] 36f9edc305d963fc8f8068c193d5156434628fd48a523762d8a98a9123ae0a2a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustracing/0.2.0:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 51f3c063ab8b9fb38ea269eb55a7d7f6b2f46983b018330210e34b3ceca75e5c
[INFO] running `"docker" "start" "-a" "51f3c063ab8b9fb38ea269eb55a7d7f6b2f46983b018330210e34b3ceca75e5c"`
[INFO] [stderr]    Compiling rustracing v0.2.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/sampler.rs:50:30
[INFO] [stderr]    |
[INFO] [stderr] 50 | pub type BoxSampler<T> = Box<Sampler<T> + Send + Sync + 'static>;
[INFO] [stderr]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Sampler<T> + Send + Sync + 'static`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.73s
[INFO] running `"docker" "inspect" "51f3c063ab8b9fb38ea269eb55a7d7f6b2f46983b018330210e34b3ceca75e5c"`
[INFO] running `"docker" "rm" "-f" "51f3c063ab8b9fb38ea269eb55a7d7f6b2f46983b018330210e34b3ceca75e5c"`
[INFO] [stdout] 51f3c063ab8b9fb38ea269eb55a7d7f6b2f46983b018330210e34b3ceca75e5c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustracing/0.2.0:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] cb8998edf176aa7e874b41fc41d88ecc7fcfab583911f0c2bbae4157273fb59a
[INFO] running `"docker" "start" "-a" "cb8998edf176aa7e874b41fc41d88ecc7fcfab583911f0c2bbae4157273fb59a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rustracing-73b30f3bbe69b023
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test convert::tests::it_works ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test tests::nonblocking_on_full_queue ... ok
[INFO] [stdout] test tests::example_code_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rustracing
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/tag.rs - tag::Tag::new (line 14) ... ok
[INFO] [stdout] test src/span.rs - span::Span<T>::inactive (line 30) ... ok
[INFO] [stdout] test src/tracer.rs - tracer::Tracer (line 10) ... ok
[INFO] [stdout] test src/lib.rs -  (line 5) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "cb8998edf176aa7e874b41fc41d88ecc7fcfab583911f0c2bbae4157273fb59a"`
[INFO] running `"docker" "rm" "-f" "cb8998edf176aa7e874b41fc41d88ecc7fcfab583911f0c2bbae4157273fb59a"`
[INFO] [stdout] cb8998edf176aa7e874b41fc41d88ecc7fcfab583911f0c2bbae4157273fb59a