[INFO] fetching crate tow 0.0.1...
[INFO] extracting crate tow 0.0.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/tow/0.0.1
[INFO] extracting crate tow 0.0.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/tow/0.0.1
[INFO] validating manifest of tow-0.0.1 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 tow-0.0.1 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 tow-0.0.1
[INFO] finished frobbing tow-0.0.1
[INFO] frobbed toml for tow-0.0.1 written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/reg/tow/0.0.1/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 tow-0.0.1 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-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 71fe99ffb428bc0ff6f3a09b5e016f41c55e6093e191bcad854f5c6767583448
[INFO] running `"docker" "start" "-a" "71fe99ffb428bc0ff6f3a09b5e016f41c55e6093e191bcad854f5c6767583448"`
[INFO] [stderr]    Compiling tow v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `"docker" "inspect" "71fe99ffb428bc0ff6f3a09b5e016f41c55e6093e191bcad854f5c6767583448"`
[INFO] running `"docker" "rm" "-f" "71fe99ffb428bc0ff6f3a09b5e016f41c55e6093e191bcad854f5c6767583448"`
[INFO] [stdout] 71fe99ffb428bc0ff6f3a09b5e016f41c55e6093e191bcad854f5c6767583448
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 81d5b50614881b19a4be779705514beaa7a67b0311432e4985dfa3b23dac2fde
[INFO] running `"docker" "start" "-a" "81d5b50614881b19a4be779705514beaa7a67b0311432e4985dfa3b23dac2fde"`
[INFO] [stderr]    Compiling tow v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "81d5b50614881b19a4be779705514beaa7a67b0311432e4985dfa3b23dac2fde"`
[INFO] running `"docker" "rm" "-f" "81d5b50614881b19a4be779705514beaa7a67b0311432e4985dfa3b23dac2fde"`
[INFO] [stdout] 81d5b50614881b19a4be779705514beaa7a67b0311432e4985dfa3b23dac2fde
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 76091cfb69a056bab8473f6da0cc0cb5674cdecbd48b0cebcec08f6675d458a2
[INFO] running `"docker" "start" "-a" "76091cfb69a056bab8473f6da0cc0cb5674cdecbd48b0cebcec08f6675d458a2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tow-723d8f17982a13a6
[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" "76091cfb69a056bab8473f6da0cc0cb5674cdecbd48b0cebcec08f6675d458a2"`
[INFO] running `"docker" "rm" "-f" "76091cfb69a056bab8473f6da0cc0cb5674cdecbd48b0cebcec08f6675d458a2"`
[INFO] [stdout] 76091cfb69a056bab8473f6da0cc0cb5674cdecbd48b0cebcec08f6675d458a2