[INFO] updating cached repository CallumHoward/walker
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/CallumHoward/walker
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/CallumHoward/walker" "work/ex/beta-1.38-1/sources/1.37.0/gh/CallumHoward/walker"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/CallumHoward/walker'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CallumHoward/walker" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CallumHoward/walker"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CallumHoward/walker'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 520ce48eee602ad01de6343e4fa1b5916ce0b900
[INFO] sha for GitHub repo CallumHoward/walker: 520ce48eee602ad01de6343e4fa1b5916ce0b900
[INFO] validating manifest of CallumHoward/walker 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 CallumHoward/walker 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 CallumHoward/walker
[INFO] finished frobbing CallumHoward/walker
[INFO] frobbed toml for CallumHoward/walker written to work/ex/beta-1.38-1/sources/1.37.0/gh/CallumHoward/walker/Cargo.toml
[INFO] started frobbing CallumHoward/walker
[INFO] finished frobbing CallumHoward/walker
[INFO] frobbed toml for CallumHoward/walker written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CallumHoward/walker/Cargo.toml
[INFO] crate CallumHoward/walker 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing CallumHoward/walker 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-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CallumHoward/walker:/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] 67578019def5d31d2263539a323ec060a7432d34a4edb800a234b6a4ff08922d
[INFO] running `"docker" "start" "-a" "67578019def5d31d2263539a323ec060a7432d34a4edb800a234b6a4ff08922d"`
[INFO] [stderr]    Compiling fnv v1.0.5
[INFO] [stderr]    Compiling same-file v0.1.3
[INFO] [stderr]    Compiling crossbeam v0.2.10
[INFO] [stderr]    Compiling thread-id v3.1.0
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling thread_local v0.3.3
[INFO] [stderr]    Compiling walkdir v1.0.7
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling regex v0.2.2
[INFO] [stderr]    Compiling globset v0.2.0
[INFO] [stderr]    Compiling ignore v0.2.0
[INFO] [stderr]    Compiling walker v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.78s
[INFO] running `"docker" "inspect" "67578019def5d31d2263539a323ec060a7432d34a4edb800a234b6a4ff08922d"`
[INFO] running `"docker" "rm" "-f" "67578019def5d31d2263539a323ec060a7432d34a4edb800a234b6a4ff08922d"`
[INFO] [stdout] 67578019def5d31d2263539a323ec060a7432d34a4edb800a234b6a4ff08922d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CallumHoward/walker:/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] 1ae30b5ed1db9e30a9ea51d83ba6b5f23ec13b2f9b8a47432def21dbc73dc159
[INFO] running `"docker" "start" "-a" "1ae30b5ed1db9e30a9ea51d83ba6b5f23ec13b2f9b8a47432def21dbc73dc159"`
[INFO] [stderr]    Compiling walker v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.06s
[INFO] running `"docker" "inspect" "1ae30b5ed1db9e30a9ea51d83ba6b5f23ec13b2f9b8a47432def21dbc73dc159"`
[INFO] running `"docker" "rm" "-f" "1ae30b5ed1db9e30a9ea51d83ba6b5f23ec13b2f9b8a47432def21dbc73dc159"`
[INFO] [stdout] 1ae30b5ed1db9e30a9ea51d83ba6b5f23ec13b2f9b8a47432def21dbc73dc159
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/CallumHoward/walker:/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] 7f7aea3dc555d109bb2922e717a3fcb3f96d27f5b0c1c82d815682d7f456b34e
[INFO] running `"docker" "start" "-a" "7f7aea3dc555d109bb2922e717a3fcb3f96d27f5b0c1c82d815682d7f456b34e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/walker-ba24af4fcb0ec9cb
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/walker-3877498b2b24c1c0
[INFO] [stdout] running 0 tests
[INFO] [stderr]    Doc-tests walker
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 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" "7f7aea3dc555d109bb2922e717a3fcb3f96d27f5b0c1c82d815682d7f456b34e"`
[INFO] running `"docker" "rm" "-f" "7f7aea3dc555d109bb2922e717a3fcb3f96d27f5b0c1c82d815682d7f456b34e"`
[INFO] [stdout] 7f7aea3dc555d109bb2922e717a3fcb3f96d27f5b0c1c82d815682d7f456b34e