[INFO] crate prefetchkit 1.0.2 is already in cache
[INFO] extracting crate prefetchkit 1.0.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/prefetchkit/1.0.2
[INFO] extracting crate prefetchkit 1.0.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/prefetchkit/1.0.2
[INFO] validating manifest of prefetchkit-1.0.2 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 prefetchkit-1.0.2 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 prefetchkit-1.0.2
[INFO] finished frobbing prefetchkit-1.0.2
[INFO] frobbed toml for prefetchkit-1.0.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/prefetchkit/1.0.2/Cargo.toml
[INFO] started frobbing prefetchkit-1.0.2
[INFO] finished frobbing prefetchkit-1.0.2
[INFO] frobbed toml for prefetchkit-1.0.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/prefetchkit/1.0.2/Cargo.toml
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing prefetchkit-1.0.2 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/prefetchkit/1.0.2:/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] 6dbabc8b951e17716a4dec7ac024337f1d3fc5945f1454a6599fa80bf9023594
[INFO] running `"docker" "start" "-a" "6dbabc8b951e17716a4dec7ac024337f1d3fc5945f1454a6599fa80bf9023594"`
[INFO] [stderr]    Compiling libprefetch v0.1.1
[INFO] [stderr]    Compiling prefetchkit v1.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/kit.rs:23:23
[INFO] [stderr]    |
[INFO] [stderr] 23 |     -> Result<(), Box<std::error::Error>> {
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/kit.rs:68:23
[INFO] [stderr]    |
[INFO] [stderr] 68 |     -> Result<(), Box<std::error::Error>> {
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.62s
[INFO] running `"docker" "inspect" "6dbabc8b951e17716a4dec7ac024337f1d3fc5945f1454a6599fa80bf9023594"`
[INFO] running `"docker" "rm" "-f" "6dbabc8b951e17716a4dec7ac024337f1d3fc5945f1454a6599fa80bf9023594"`
[INFO] [stdout] 6dbabc8b951e17716a4dec7ac024337f1d3fc5945f1454a6599fa80bf9023594
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/prefetchkit/1.0.2:/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] 7b5a772437f5b99c4dbeba2dbb9cd839165c03e2c50cb0bf23bd3b1debd6e989
[INFO] running `"docker" "start" "-a" "7b5a772437f5b99c4dbeba2dbb9cd839165c03e2c50cb0bf23bd3b1debd6e989"`
[INFO] [stderr]    Compiling prefetchkit v1.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/kit.rs:23:23
[INFO] [stderr]    |
[INFO] [stderr] 23 |     -> Result<(), Box<std::error::Error>> {
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/kit.rs:68:23
[INFO] [stderr]    |
[INFO] [stderr] 68 |     -> Result<(), Box<std::error::Error>> {
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `"docker" "inspect" "7b5a772437f5b99c4dbeba2dbb9cd839165c03e2c50cb0bf23bd3b1debd6e989"`
[INFO] running `"docker" "rm" "-f" "7b5a772437f5b99c4dbeba2dbb9cd839165c03e2c50cb0bf23bd3b1debd6e989"`
[INFO] [stdout] 7b5a772437f5b99c4dbeba2dbb9cd839165c03e2c50cb0bf23bd3b1debd6e989
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/prefetchkit/1.0.2:/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] 13c4d28bccf2598f0e07cbc969f2fb173de1c6914ff2a84c96100a3e0e3f4864
[INFO] running `"docker" "start" "-a" "13c4d28bccf2598f0e07cbc969f2fb173de1c6914ff2a84c96100a3e0e3f4864"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/prefetchkit-d11ac97e4d6c7213
[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" "13c4d28bccf2598f0e07cbc969f2fb173de1c6914ff2a84c96100a3e0e3f4864"`
[INFO] running `"docker" "rm" "-f" "13c4d28bccf2598f0e07cbc969f2fb173de1c6914ff2a84c96100a3e0e3f4864"`
[INFO] [stdout] 13c4d28bccf2598f0e07cbc969f2fb173de1c6914ff2a84c96100a3e0e3f4864