[INFO] updating cached repository sector-f/prepend
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sector-f/prepend
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sector-f/prepend" "work/ex/beta-1.38-1/sources/1.37.0/gh/sector-f/prepend"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/sector-f/prepend'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sector-f/prepend" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sector-f/prepend"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sector-f/prepend'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 97f905b50808d6898e961aeee054b3aedfd53735
[INFO] sha for GitHub repo sector-f/prepend: 97f905b50808d6898e961aeee054b3aedfd53735
[INFO] validating manifest of sector-f/prepend 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 sector-f/prepend 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 sector-f/prepend
[INFO] finished frobbing sector-f/prepend
[INFO] frobbed toml for sector-f/prepend written to work/ex/beta-1.38-1/sources/1.37.0/gh/sector-f/prepend/Cargo.toml
[INFO] started frobbing sector-f/prepend
[INFO] finished frobbing sector-f/prepend
[INFO] frobbed toml for sector-f/prepend written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/sector-f/prepend/Cargo.toml
[INFO] crate sector-f/prepend 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/sector-f/prepend/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[INFO] the lockfile is outdated, regenerating it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] [stderr]     Blocking waiting for file lock on package cache
[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 sector-f/prepend 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-5/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/sector-f/prepend:/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] 748ef23a2a3f0814e28e35e9e6e90b4c99fb543311f9a4b6ec73cb147d2911e1
[INFO] running `"docker" "start" "-a" "748ef23a2a3f0814e28e35e9e6e90b4c99fb543311f9a4b6ec73cb147d2911e1"`
[INFO] [stderr]    Compiling prepend v2.2.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `"docker" "inspect" "748ef23a2a3f0814e28e35e9e6e90b4c99fb543311f9a4b6ec73cb147d2911e1"`
[INFO] running `"docker" "rm" "-f" "748ef23a2a3f0814e28e35e9e6e90b4c99fb543311f9a4b6ec73cb147d2911e1"`
[INFO] [stdout] 748ef23a2a3f0814e28e35e9e6e90b4c99fb543311f9a4b6ec73cb147d2911e1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/sector-f/prepend:/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] 91de1b2d9122a57a0a22a2e7606cdf6fb04b94dd78e8482e7ba12fbf74cc4c55
[INFO] running `"docker" "start" "-a" "91de1b2d9122a57a0a22a2e7606cdf6fb04b94dd78e8482e7ba12fbf74cc4c55"`
[INFO] [stderr]    Compiling prepend v2.2.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.84s
[INFO] running `"docker" "inspect" "91de1b2d9122a57a0a22a2e7606cdf6fb04b94dd78e8482e7ba12fbf74cc4c55"`
[INFO] running `"docker" "rm" "-f" "91de1b2d9122a57a0a22a2e7606cdf6fb04b94dd78e8482e7ba12fbf74cc4c55"`
[INFO] [stdout] 91de1b2d9122a57a0a22a2e7606cdf6fb04b94dd78e8482e7ba12fbf74cc4c55
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/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/sector-f/prepend:/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] b73cf715cc690b1d9069a056928a4c013afff9c6dec6f14d2b1a9aff66ce4af5
[INFO] running `"docker" "start" "-a" "b73cf715cc690b1d9069a056928a4c013afff9c6dec6f14d2b1a9aff66ce4af5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/prepend-7ab338fcbddc7812
[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" "b73cf715cc690b1d9069a056928a4c013afff9c6dec6f14d2b1a9aff66ce4af5"`
[INFO] running `"docker" "rm" "-f" "b73cf715cc690b1d9069a056928a4c013afff9c6dec6f14d2b1a9aff66ce4af5"`
[INFO] [stdout] b73cf715cc690b1d9069a056928a4c013afff9c6dec6f14d2b1a9aff66ce4af5