[INFO] updating cached repository epsimatt/serpent
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/epsimatt/serpent
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/epsimatt/serpent" "work/ex/beta-1.38-1/sources/1.37.0/gh/epsimatt/serpent"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/epsimatt/serpent'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/epsimatt/serpent" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/epsimatt/serpent"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/epsimatt/serpent'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0eb4a7d965817d86648c7110bad6cb85b3d2474c
[INFO] sha for GitHub repo epsimatt/serpent: 0eb4a7d965817d86648c7110bad6cb85b3d2474c
[INFO] validating manifest of epsimatt/serpent 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 epsimatt/serpent 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 epsimatt/serpent
[INFO] finished frobbing epsimatt/serpent
[INFO] frobbed toml for epsimatt/serpent written to work/ex/beta-1.38-1/sources/1.37.0/gh/epsimatt/serpent/Cargo.toml
[INFO] started frobbing epsimatt/serpent
[INFO] finished frobbing epsimatt/serpent
[INFO] frobbed toml for epsimatt/serpent written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/epsimatt/serpent/Cargo.toml
[INFO] crate epsimatt/serpent already has a lockfile, it will not be regenerated
[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 epsimatt/serpent 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/epsimatt/serpent:/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] 2572fe80190a45d3c6a1438a0781d3f72ab051deee4194360306ce0d8cc7143b
[INFO] running `"docker" "start" "-a" "2572fe80190a45d3c6a1438a0781d3f72ab051deee4194360306ce0d8cc7143b"`
[INFO] [stderr]    Compiling autocfg v0.1.1
[INFO] [stderr]    Compiling serde v1.0.84
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling miniz-sys v0.1.11
[INFO] [stderr]    Compiling base64 v0.10.0
[INFO] [stderr]    Compiling base64 v0.8.0
[INFO] [stderr]    Compiling mlog v0.2.1
[INFO] [stderr]    Compiling rand_os v0.1.1
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling rand v0.4.5
[INFO] [stderr]    Compiling openssl-sys v0.9.40
[INFO] [stderr]    Compiling num_cpus v1.9.0
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling syn v0.15.24
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.4
[INFO] [stderr]    Compiling flate2 v1.0.6
[INFO] [stderr]    Compiling threadpool v1.7.1
[INFO] [stderr]    Compiling hyper v0.10.15
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling uuid v0.5.1
[INFO] [stderr]    Compiling parking_lot v0.5.5
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling mime_guess v1.8.6
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling serde_derive v1.0.84
[INFO] [stderr]    Compiling hyper-native-tls v0.2.4
[INFO] [stderr]    Compiling evzht9h3nznqzwl v0.0.3
[INFO] [stderr]    Compiling multipart v0.13.6
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling serde_json v1.0.35
[INFO] [stderr]    Compiling serenity v0.5.11
[INFO] [stderr]    Compiling serpent v0.2.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 21s
[INFO] running `"docker" "inspect" "2572fe80190a45d3c6a1438a0781d3f72ab051deee4194360306ce0d8cc7143b"`
[INFO] running `"docker" "rm" "-f" "2572fe80190a45d3c6a1438a0781d3f72ab051deee4194360306ce0d8cc7143b"`
[INFO] [stdout] 2572fe80190a45d3c6a1438a0781d3f72ab051deee4194360306ce0d8cc7143b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/epsimatt/serpent:/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] 3c72b57828dc569256f780cb6d9421d73910e1bf2720b40466958ba6cba3a6ae
[INFO] running `"docker" "start" "-a" "3c72b57828dc569256f780cb6d9421d73910e1bf2720b40466958ba6cba3a6ae"`
[INFO] [stderr]    Compiling serpent v0.2.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `"docker" "inspect" "3c72b57828dc569256f780cb6d9421d73910e1bf2720b40466958ba6cba3a6ae"`
[INFO] running `"docker" "rm" "-f" "3c72b57828dc569256f780cb6d9421d73910e1bf2720b40466958ba6cba3a6ae"`
[INFO] [stdout] 3c72b57828dc569256f780cb6d9421d73910e1bf2720b40466958ba6cba3a6ae
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/epsimatt/serpent:/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] 82f8f88e358ac2b42314b5020ea48a553df72d7ba0b82a5b0ebe98fe7a02ed14
[INFO] running `"docker" "start" "-a" "82f8f88e358ac2b42314b5020ea48a553df72d7ba0b82a5b0ebe98fe7a02ed14"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/serpent-7108e44cc1ffb78a
[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" "82f8f88e358ac2b42314b5020ea48a553df72d7ba0b82a5b0ebe98fe7a02ed14"`
[INFO] running `"docker" "rm" "-f" "82f8f88e358ac2b42314b5020ea48a553df72d7ba0b82a5b0ebe98fe7a02ed14"`
[INFO] [stdout] 82f8f88e358ac2b42314b5020ea48a553df72d7ba0b82a5b0ebe98fe7a02ed14