[INFO] crate tracing-tower 0.0.0 is already in cache
[INFO] extracting crate tracing-tower 0.0.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/tracing-tower/0.0.0
[INFO] extracting crate tracing-tower 0.0.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/tracing-tower/0.0.0
[INFO] validating manifest of tracing-tower-0.0.0 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 tracing-tower-0.0.0 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 tracing-tower-0.0.0
[INFO] finished frobbing tracing-tower-0.0.0
[INFO] frobbed toml for tracing-tower-0.0.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/tracing-tower/0.0.0/Cargo.toml
[INFO] started frobbing tracing-tower-0.0.0
[INFO] finished frobbing tracing-tower-0.0.0
[INFO] frobbed toml for tracing-tower-0.0.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/tracing-tower/0.0.0/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing tracing-tower-0.0.0 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-2/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-tower/0.0.0:/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] bf236f62d6c9acf1ab6669f32c6b59bfcc7c944591546ab67da4acfeb538fd5a
[INFO] running `"docker" "start" "-a" "bf236f62d6c9acf1ab6669f32c6b59bfcc7c944591546ab67da4acfeb538fd5a"`
[INFO] [stderr]    Compiling tracing-tower v0.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `"docker" "inspect" "bf236f62d6c9acf1ab6669f32c6b59bfcc7c944591546ab67da4acfeb538fd5a"`
[INFO] running `"docker" "rm" "-f" "bf236f62d6c9acf1ab6669f32c6b59bfcc7c944591546ab67da4acfeb538fd5a"`
[INFO] [stdout] bf236f62d6c9acf1ab6669f32c6b59bfcc7c944591546ab67da4acfeb538fd5a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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-tower/0.0.0:/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] ff2f319f6e72d0dd7b9874db3bea8d3df6d01be250654c2d9179e427bccbcbab
[INFO] running `"docker" "start" "-a" "ff2f319f6e72d0dd7b9874db3bea8d3df6d01be250654c2d9179e427bccbcbab"`
[INFO] [stderr]    Compiling tracing-tower v0.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `"docker" "inspect" "ff2f319f6e72d0dd7b9874db3bea8d3df6d01be250654c2d9179e427bccbcbab"`
[INFO] running `"docker" "rm" "-f" "ff2f319f6e72d0dd7b9874db3bea8d3df6d01be250654c2d9179e427bccbcbab"`
[INFO] [stdout] ff2f319f6e72d0dd7b9874db3bea8d3df6d01be250654c2d9179e427bccbcbab
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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-tower/0.0.0:/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] 3ec7b2203ff77c0f5633447190ae10a5d30a532748223d9bb547d51224d20e4a
[INFO] running `"docker" "start" "-a" "3ec7b2203ff77c0f5633447190ae10a5d30a532748223d9bb547d51224d20e4a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tracing_tower-f946a78c0be930ba
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stderr]    Doc-tests tracing-tower
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 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" "3ec7b2203ff77c0f5633447190ae10a5d30a532748223d9bb547d51224d20e4a"`
[INFO] running `"docker" "rm" "-f" "3ec7b2203ff77c0f5633447190ae10a5d30a532748223d9bb547d51224d20e4a"`
[INFO] [stdout] 3ec7b2203ff77c0f5633447190ae10a5d30a532748223d9bb547d51224d20e4a