[INFO] crate tow 0.0.1 is already in cache
[INFO] extracting crate tow 0.0.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/tow/0.0.1
[INFO] extracting crate tow 0.0.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/tow/0.0.1
[INFO] validating manifest of tow-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 tow-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 tow-0.0.1
[INFO] finished frobbing tow-0.0.1
[INFO] frobbed toml for tow-0.0.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/tow/0.0.1/Cargo.toml
[INFO] started frobbing tow-0.0.1
[INFO] finished frobbing tow-0.0.1
[INFO] frobbed toml for tow-0.0.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/tow/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 tow-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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/tow/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] 5cc4e3d61bd31c3c5947bc1b9ac01b5e4469d3c1415353673265512d423d6539
[INFO] running `"docker" "start" "-a" "5cc4e3d61bd31c3c5947bc1b9ac01b5e4469d3c1415353673265512d423d6539"`
[INFO] [stderr]    Compiling tow v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `"docker" "inspect" "5cc4e3d61bd31c3c5947bc1b9ac01b5e4469d3c1415353673265512d423d6539"`
[INFO] running `"docker" "rm" "-f" "5cc4e3d61bd31c3c5947bc1b9ac01b5e4469d3c1415353673265512d423d6539"`
[INFO] [stdout] 5cc4e3d61bd31c3c5947bc1b9ac01b5e4469d3c1415353673265512d423d6539
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/tow/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] 4b792864e9468c39babbf809a72c99f4e33a9a2b6cc3b37f0944d9ef55da31b8
[INFO] running `"docker" "start" "-a" "4b792864e9468c39babbf809a72c99f4e33a9a2b6cc3b37f0944d9ef55da31b8"`
[INFO] [stderr]    Compiling tow v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "4b792864e9468c39babbf809a72c99f4e33a9a2b6cc3b37f0944d9ef55da31b8"`
[INFO] running `"docker" "rm" "-f" "4b792864e9468c39babbf809a72c99f4e33a9a2b6cc3b37f0944d9ef55da31b8"`
[INFO] [stdout] 4b792864e9468c39babbf809a72c99f4e33a9a2b6cc3b37f0944d9ef55da31b8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/tow/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] 6ab9d15474bc1f682f641479a6fcda4a11a625c0fef3e033064388fd258e181c
[INFO] running `"docker" "start" "-a" "6ab9d15474bc1f682f641479a6fcda4a11a625c0fef3e033064388fd258e181c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tow-560c35a8deb84361
[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" "6ab9d15474bc1f682f641479a6fcda4a11a625c0fef3e033064388fd258e181c"`
[INFO] running `"docker" "rm" "-f" "6ab9d15474bc1f682f641479a6fcda4a11a625c0fef3e033064388fd258e181c"`
[INFO] [stdout] 6ab9d15474bc1f682f641479a6fcda4a11a625c0fef3e033064388fd258e181c