[INFO] fetching crate tower 0.1.1...
[INFO] extracting crate tower 0.1.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/tower/0.1.1
[INFO] extracting crate tower 0.1.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/tower/0.1.1
[INFO] validating manifest of tower-0.1.1 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tower-0.1.1 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tower-0.1.1
[INFO] finished frobbing tower-0.1.1
[INFO] frobbed toml for tower-0.1.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/tower/0.1.1/Cargo.toml
[INFO] started frobbing tower-0.1.1
[INFO] finished frobbing tower-0.1.1
[INFO] frobbed toml for tower-0.1.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/tower/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tower-0.1.1 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/tower/0.1.1:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 031ef1067702cf7ec9ef99ecc06676ebafaa8c6c4cffbb72f9f23b397eda97e2
[INFO] running `"docker" "start" "-a" "031ef1067702cf7ec9ef99ecc06676ebafaa8c6c4cffbb72f9f23b397eda97e2"`
[INFO] [stderr]    Compiling tower-discover v0.1.0
[INFO] [stderr]    Compiling tracing v0.1.3
[INFO] [stderr]    Compiling tower-load-shed v0.1.0
[INFO] [stderr]    Compiling tower-limit v0.1.0
[INFO] [stderr]    Compiling tower-timeout v0.1.1
[INFO] [stderr]    Compiling tower-retry v0.1.0
[INFO] [stderr]    Compiling tower-util v0.1.0
[INFO] [stderr]    Compiling tower-buffer v0.1.1
[INFO] [stderr]    Compiling tower v0.1.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.50s
[INFO] running `"docker" "inspect" "031ef1067702cf7ec9ef99ecc06676ebafaa8c6c4cffbb72f9f23b397eda97e2"`
[INFO] running `"docker" "rm" "-f" "031ef1067702cf7ec9ef99ecc06676ebafaa8c6c4cffbb72f9f23b397eda97e2"`
[INFO] [stdout] 031ef1067702cf7ec9ef99ecc06676ebafaa8c6c4cffbb72f9f23b397eda97e2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/tower/0.1.1:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ea078521b22fb7d9eecb8ca6aaf804fc145751c171e093f97a5cf2d6ce470815
[INFO] running `"docker" "start" "-a" "ea078521b22fb7d9eecb8ca6aaf804fc145751c171e093f97a5cf2d6ce470815"`
[INFO] [stderr]    Compiling env_logger v0.5.13
[INFO] [stderr]    Compiling tower v0.1.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.54s
[INFO] running `"docker" "inspect" "ea078521b22fb7d9eecb8ca6aaf804fc145751c171e093f97a5cf2d6ce470815"`
[INFO] running `"docker" "rm" "-f" "ea078521b22fb7d9eecb8ca6aaf804fc145751c171e093f97a5cf2d6ce470815"`
[INFO] [stdout] ea078521b22fb7d9eecb8ca6aaf804fc145751c171e093f97a5cf2d6ce470815
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/tower/0.1.1:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 84de6b230e357047500419b919b12fcf64d459f3ea1ce825bb3904691877a4bf
[INFO] running `"docker" "start" "-a" "84de6b230e357047500419b919b12fcf64d459f3ea1ce825bb3904691877a4bf"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tower-aff6815e6cced2e8
[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]      Running /opt/crater/target/debug/deps/builder-426cfee83f355c63
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test builder_service ... 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 tower
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/builder/mod.rs - builder::ServiceBuilder (line 62) ... ok
[INFO] [stdout] test src/builder/mod.rs - builder::ServiceBuilder (line 86) ... ok
[INFO] [stdout] test src/builder/mod.rs - builder::ServiceBuilder (line 40) ... ok
[INFO] [stdout] test src/builder/mod.rs - builder::ServiceBuilder (line 117) ... 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" "84de6b230e357047500419b919b12fcf64d459f3ea1ce825bb3904691877a4bf"`
[INFO] running `"docker" "rm" "-f" "84de6b230e357047500419b919b12fcf64d459f3ea1ce825bb3904691877a4bf"`
[INFO] [stdout] 84de6b230e357047500419b919b12fcf64d459f3ea1ce825bb3904691877a4bf