[INFO] updating cached repository komuniki/backends
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/komuniki/backends
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/komuniki/backends" "work/ex/beta-1.38-1/sources/1.37.0/gh/komuniki/backends"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/komuniki/backends'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/komuniki/backends" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/komuniki/backends"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/komuniki/backends'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b93b0fbdd74f95b9f9eafbac8d445bdd187af37f
[INFO] sha for GitHub repo komuniki/backends: b93b0fbdd74f95b9f9eafbac8d445bdd187af37f
[INFO] validating manifest of komuniki/backends 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 komuniki/backends 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 komuniki/backends
[INFO] finished frobbing komuniki/backends
[INFO] frobbed toml for komuniki/backends written to work/ex/beta-1.38-1/sources/1.37.0/gh/komuniki/backends/Cargo.toml
[INFO] started frobbing komuniki/backends
[INFO] finished frobbing komuniki/backends
[INFO] frobbed toml for komuniki/backends written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/komuniki/backends/Cargo.toml
[INFO] crate komuniki/backends 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/komuniki/backends/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[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 komuniki/backends 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/komuniki/backends:/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] cc7b8611e0bd6bf76bae6625ef79287638afcbe4b01fad43179fd77ef2b17648
[INFO] running `"docker" "start" "-a" "cc7b8611e0bd6bf76bae6625ef79287638afcbe4b01fad43179fd77ef2b17648"`
[INFO] [stderr]    Compiling komuniki-backends v0.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "cc7b8611e0bd6bf76bae6625ef79287638afcbe4b01fad43179fd77ef2b17648"`
[INFO] running `"docker" "rm" "-f" "cc7b8611e0bd6bf76bae6625ef79287638afcbe4b01fad43179fd77ef2b17648"`
[INFO] [stdout] cc7b8611e0bd6bf76bae6625ef79287638afcbe4b01fad43179fd77ef2b17648
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/komuniki/backends:/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] 37ce5e5c974c5c251df37b712880e0fcdb576f74163ca30eee18562ad7a64e46
[INFO] running `"docker" "start" "-a" "37ce5e5c974c5c251df37b712880e0fcdb576f74163ca30eee18562ad7a64e46"`
[INFO] [stderr]    Compiling komuniki-backends v0.0.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `"docker" "inspect" "37ce5e5c974c5c251df37b712880e0fcdb576f74163ca30eee18562ad7a64e46"`
[INFO] running `"docker" "rm" "-f" "37ce5e5c974c5c251df37b712880e0fcdb576f74163ca30eee18562ad7a64e46"`
[INFO] [stdout] 37ce5e5c974c5c251df37b712880e0fcdb576f74163ca30eee18562ad7a64e46
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/komuniki/backends:/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] 1b1c37108ce75bcdccaf33a28d7437d131b0e8fdba111ad3efed11e5e9414166
[INFO] running `"docker" "start" "-a" "1b1c37108ce75bcdccaf33a28d7437d131b0e8fdba111ad3efed11e5e9414166"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/komuniki_backends-004a978e4eb6c039
[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" "1b1c37108ce75bcdccaf33a28d7437d131b0e8fdba111ad3efed11e5e9414166"`
[INFO] running `"docker" "rm" "-f" "1b1c37108ce75bcdccaf33a28d7437d131b0e8fdba111ad3efed11e5e9414166"`
[INFO] [stdout] 1b1c37108ce75bcdccaf33a28d7437d131b0e8fdba111ad3efed11e5e9414166