[INFO] crate crates-mirror 0.2.1 is already in cache
[INFO] extracting crate crates-mirror 0.2.1 into work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/reg/crates-mirror/0.2.1
[INFO] extracting crate crates-mirror 0.2.1 into work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/reg/crates-mirror/0.2.1
[INFO] validating manifest of crates-mirror-0.2.1 on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of crates-mirror-0.2.1 on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing crates-mirror-0.2.1
[INFO] finished frobbing crates-mirror-0.2.1
[INFO] frobbed toml for crates-mirror-0.2.1 written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/reg/crates-mirror/0.2.1/Cargo.toml
[INFO] started frobbing crates-mirror-0.2.1
[INFO] finished frobbing crates-mirror-0.2.1
[INFO] frobbed toml for crates-mirror-0.2.1 written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/reg/crates-mirror/0.2.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking crates-mirror-0.2.1 against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-2/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/reg/crates-mirror/0.2.1:/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=forbid" "-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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b7db2f0d3b82152aec885f1afccc2016e0729be10c000774613a016fd1b87821
[INFO] running `"docker" "start" "-a" "b7db2f0d3b82152aec885f1afccc2016e0729be10c000774613a016fd1b87821"`
[INFO] [stderr]     Checking byte-tools v0.1.3
[INFO] [stderr]     Checking generic-array v0.5.1
[INFO] [stderr]     Checking curl v0.4.23
[INFO] [stderr]     Checking digest-buffer v0.1.2
[INFO] [stderr]     Checking digest v0.2.1
[INFO] [stderr]     Checking sha2 v0.2.0
[INFO] [stderr]     Checking crates-mirror v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] error: the item `File` is imported redundantly
[INFO] [stderr]   --> src/main.rs:70:13
[INFO] [stderr]    |
[INFO] [stderr] 25 | use std::fs::{create_dir_all, File};
[INFO] [stderr]    |                               ---- the item `File` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 70 |         use std::fs::File;
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![deny(warnings)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] error: the item `Read` is imported redundantly
[INFO] [stderr]   --> src/main.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 26 | use std::io::{BufWriter, Write, Read, BufReader, BufRead};
[INFO] [stderr]    |                                 ---- the item `Read` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 71 |         use std::io::Read;
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: the item `File` is imported redundantly
[INFO] [stderr]   --> src/main.rs:70:13
[INFO] [stderr]    |
[INFO] [stderr] 25 | use std::fs::{create_dir_all, File};
[INFO] [stderr]    |                               ---- the item `File` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 70 |         use std::fs::File;
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/main.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![deny(warnings)]
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] error: the item `Read` is imported redundantly
[INFO] [stderr]   --> src/main.rs:71:13
[INFO] [stderr]    |
[INFO] [stderr] 26 | use std::io::{BufWriter, Write, Read, BufReader, BufRead};
[INFO] [stderr]    |                                 ---- the item `Read` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 71 |         use std::io::Read;
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `crates-mirror`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `crates-mirror`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b7db2f0d3b82152aec885f1afccc2016e0729be10c000774613a016fd1b87821"`
[INFO] running `"docker" "rm" "-f" "b7db2f0d3b82152aec885f1afccc2016e0729be10c000774613a016fd1b87821"`
[INFO] [stdout] b7db2f0d3b82152aec885f1afccc2016e0729be10c000774613a016fd1b87821