[INFO] crate kt 0.0.7 is already in cache
[INFO] extracting crate kt 0.0.7 into work/ex/beta-1.38-1/sources/1.37.0/reg/kt/0.0.7
[INFO] extracting crate kt 0.0.7 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/kt/0.0.7
[INFO] validating manifest of kt-0.0.7 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 kt-0.0.7 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 kt-0.0.7
[INFO] finished frobbing kt-0.0.7
[INFO] frobbed toml for kt-0.0.7 written to work/ex/beta-1.38-1/sources/1.37.0/reg/kt/0.0.7/Cargo.toml
[INFO] started frobbing kt-0.0.7
[INFO] finished frobbing kt-0.0.7
[INFO] frobbed toml for kt-0.0.7 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/kt/0.0.7/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] testing kt-0.0.7 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-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/kt/0.0.7:/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] 51aba6882f483b334985e28eb27ceb1a70a0a2ba4c1dca69d15cc6590ba042d8
[INFO] running `"docker" "start" "-a" "51aba6882f483b334985e28eb27ceb1a70a0a2ba4c1dca69d15cc6590ba042d8"`
[INFO] [stderr]    Compiling kt v0.0.7 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Write` is imported redundantly
[INFO] [stderr]   --> src/kt.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 7  | use std::io::prelude::*;
[INFO] [stderr]    |     ------------------- the item `Write` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 55 |             use std::io::Write;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.17s
[INFO] running `"docker" "inspect" "51aba6882f483b334985e28eb27ceb1a70a0a2ba4c1dca69d15cc6590ba042d8"`
[INFO] running `"docker" "rm" "-f" "51aba6882f483b334985e28eb27ceb1a70a0a2ba4c1dca69d15cc6590ba042d8"`
[INFO] [stdout] 51aba6882f483b334985e28eb27ceb1a70a0a2ba4c1dca69d15cc6590ba042d8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/kt/0.0.7:/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] abece0d6824a047dbdfeb156d5eebac2d8dd8dbe012a471b7cf40907c2d5d012
[INFO] running `"docker" "start" "-a" "abece0d6824a047dbdfeb156d5eebac2d8dd8dbe012a471b7cf40907c2d5d012"`
[INFO] [stderr]    Compiling kt v0.0.7 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Write` is imported redundantly
[INFO] [stderr]   --> src/kt.rs:55:17
[INFO] [stderr]    |
[INFO] [stderr] 7  | use std::io::prelude::*;
[INFO] [stderr]    |     ------------------- the item `Write` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 55 |             use std::io::Write;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "abece0d6824a047dbdfeb156d5eebac2d8dd8dbe012a471b7cf40907c2d5d012"`
[INFO] running `"docker" "rm" "-f" "abece0d6824a047dbdfeb156d5eebac2d8dd8dbe012a471b7cf40907c2d5d012"`
[INFO] [stdout] abece0d6824a047dbdfeb156d5eebac2d8dd8dbe012a471b7cf40907c2d5d012
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/kt/0.0.7:/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] 134c117e1b54726bfa3cc76ca4fa3c2a4a760bb1de2d486631f78599ed03a266
[INFO] running `"docker" "start" "-a" "134c117e1b54726bfa3cc76ca4fa3c2a4a760bb1de2d486631f78599ed03a266"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/kt-e9b1c6329cdcf5b2
[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" "134c117e1b54726bfa3cc76ca4fa3c2a4a760bb1de2d486631f78599ed03a266"`
[INFO] running `"docker" "rm" "-f" "134c117e1b54726bfa3cc76ca4fa3c2a4a760bb1de2d486631f78599ed03a266"`
[INFO] [stdout] 134c117e1b54726bfa3cc76ca4fa3c2a4a760bb1de2d486631f78599ed03a266