[INFO] crate tracing-core 0.1.2 is already in cache
[INFO] extracting crate tracing-core 0.1.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/tracing-core/0.1.2
[INFO] extracting crate tracing-core 0.1.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/tracing-core/0.1.2
[INFO] validating manifest of tracing-core-0.1.2 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 tracing-core-0.1.2 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 tracing-core-0.1.2
[INFO] finished frobbing tracing-core-0.1.2
[INFO] frobbed toml for tracing-core-0.1.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/tracing-core/0.1.2/Cargo.toml
[INFO] started frobbing tracing-core-0.1.2
[INFO] finished frobbing tracing-core-0.1.2
[INFO] frobbed toml for tracing-core-0.1.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/tracing-core/0.1.2/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 tracing-core-0.1.2 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-7/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/tracing-core/0.1.2:/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] d3367f7ffa3711406ccdf56558e77c1cbd392cfa70d08a32678f06011e7eb3cb
[INFO] running `"docker" "start" "-a" "d3367f7ffa3711406ccdf56558e77c1cbd392cfa70d08a32678f06011e7eb3cb"`
[INFO] [stderr]    Compiling tracing-core v0.1.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.25s
[INFO] running `"docker" "inspect" "d3367f7ffa3711406ccdf56558e77c1cbd392cfa70d08a32678f06011e7eb3cb"`
[INFO] running `"docker" "rm" "-f" "d3367f7ffa3711406ccdf56558e77c1cbd392cfa70d08a32678f06011e7eb3cb"`
[INFO] [stdout] d3367f7ffa3711406ccdf56558e77c1cbd392cfa70d08a32678f06011e7eb3cb
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/tracing-core/0.1.2:/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] f443220a21abf33d920f9153e379b5d4f5d643956ce3c480b66a50f8323ae8a4
[INFO] running `"docker" "start" "-a" "f443220a21abf33d920f9153e379b5d4f5d643956ce3c480b66a50f8323ae8a4"`
[INFO] [stderr]    Compiling tracing-core v0.1.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `"docker" "inspect" "f443220a21abf33d920f9153e379b5d4f5d643956ce3c480b66a50f8323ae8a4"`
[INFO] running `"docker" "rm" "-f" "f443220a21abf33d920f9153e379b5d4f5d643956ce3c480b66a50f8323ae8a4"`
[INFO] [stdout] f443220a21abf33d920f9153e379b5d4f5d643956ce3c480b66a50f8323ae8a4
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/tracing-core/0.1.2:/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] 601f227c77afb148f81413ecf25ea638f58ba900b79c8d27eae38469c70250eb
[INFO] running `"docker" "start" "-a" "601f227c77afb148f81413ecf25ea638f58ba900b79c8d27eae38469c70250eb"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tracing_core-1e33f23b475c9357
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test dispatcher::test::dispatch_is ... ok
[INFO] [stdout] test dispatcher::test::dispatch_downcasts ... ok
[INFO] [stdout] test dispatcher::test::events_dont_infinite_loop ... ok
[INFO] [stdout] test dispatcher::test::global_dispatch ... ok
[INFO] [stdout] test field::test::empty_value_set_is_empty ... ok
[INFO] [stdout] test field::test::fields_from_other_callsets_are_skipped ... ok
[INFO] [stdout] test dispatcher::test::spans_dont_infinite_loop ... ok
[INFO] [stdout] test field::test::sparse_value_sets_are_not_empty ... ok
[INFO] [stdout] test field::test::record_debug_fn ... ok
[INFO] [stdout] test field::test::value_set_with_no_values_is_empty ... ok
[INFO] [stdout] test field::test::value_sets_with_fields_from_other_callsites_are_empty ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/macros-2be4f119dc07b39e
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test metadata_macro_api ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tracing-core
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test src/subscriber.rs - subscriber::Subscriber::record (line 217) ... ignored
[INFO] [stdout] test src/lib.rs - identify_callsite (line 59) ... ok
[INFO] [stdout] test src/dispatcher.rs - dispatcher (line 50) ... ok
[INFO] [stdout] test src/field.rs - field::Visit (line 134) ... ok
[INFO] [stdout] test src/dispatcher.rs - dispatcher (line 86) ... ok
[INFO] [stdout] test src/field.rs - field::Visit (line 101) ... ok
[INFO] [stdout] test src/lib.rs - metadata (line 95) ... ok
[INFO] [stdout] test src/dispatcher.rs - dispatcher (line 25) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "601f227c77afb148f81413ecf25ea638f58ba900b79c8d27eae38469c70250eb"`
[INFO] running `"docker" "rm" "-f" "601f227c77afb148f81413ecf25ea638f58ba900b79c8d27eae38469c70250eb"`
[INFO] [stdout] 601f227c77afb148f81413ecf25ea638f58ba900b79c8d27eae38469c70250eb