[INFO] crate clerk 0.4.0 is already in cache
[INFO] extracting crate clerk 0.4.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/clerk/0.4.0
[INFO] extracting crate clerk 0.4.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/clerk/0.4.0
[INFO] validating manifest of clerk-0.4.0 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 clerk-0.4.0 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 clerk-0.4.0
[INFO] finished frobbing clerk-0.4.0
[INFO] frobbed toml for clerk-0.4.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/clerk/0.4.0/Cargo.toml
[INFO] started frobbing clerk-0.4.0
[INFO] finished frobbing clerk-0.4.0
[INFO] frobbed toml for clerk-0.4.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/clerk/0.4.0/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 clerk-0.4.0 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/clerk/0.4.0:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] b1dd03bea8cdf0e9aaa2eb466da43ef26d115668988b68be42fb09565de07aa0
[INFO] running `"docker" "start" "-a" "b1dd03bea8cdf0e9aaa2eb466da43ef26d115668988b68be42fb09565de07aa0"`
[INFO] [stderr]    Compiling clerk v0.4.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "b1dd03bea8cdf0e9aaa2eb466da43ef26d115668988b68be42fb09565de07aa0"`
[INFO] running `"docker" "rm" "-f" "b1dd03bea8cdf0e9aaa2eb466da43ef26d115668988b68be42fb09565de07aa0"`
[INFO] [stdout] b1dd03bea8cdf0e9aaa2eb466da43ef26d115668988b68be42fb09565de07aa0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-7/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/clerk/0.4.0:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 947dc8c76975aaa55fff4e2b243947aa3f2a618c08896303b70393139a68d3d2
[INFO] running `"docker" "start" "-a" "947dc8c76975aaa55fff4e2b243947aa3f2a618c08896303b70393139a68d3d2"`
[INFO] [stderr]    Compiling clerk v0.4.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0463]: can't find crate for `itertools`
[INFO] [stderr]  --> tests/display_test.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | extern crate itertools;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0463`.
[INFO] [stderr] error: Could not compile `clerk`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "947dc8c76975aaa55fff4e2b243947aa3f2a618c08896303b70393139a68d3d2"`
[INFO] running `"docker" "rm" "-f" "947dc8c76975aaa55fff4e2b243947aa3f2a618c08896303b70393139a68d3d2"`
[INFO] [stdout] 947dc8c76975aaa55fff4e2b243947aa3f2a618c08896303b70393139a68d3d2