[INFO] fetching crate mio-child-process 0.2.1...
[INFO] extracting crate mio-child-process 0.2.1 into work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/mio-child-process/0.2.1
[INFO] extracting crate mio-child-process 0.2.1 into work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/mio-child-process/0.2.1
[INFO] validating manifest of mio-child-process-0.2.1 on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mio-child-process-0.2.1 on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mio-child-process-0.2.1
[INFO] finished frobbing mio-child-process-0.2.1
[INFO] frobbed toml for mio-child-process-0.2.1 written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/mio-child-process/0.2.1/Cargo.toml
[INFO] started frobbing mio-child-process-0.2.1
[INFO] finished frobbing mio-child-process-0.2.1
[INFO] frobbed toml for mio-child-process-0.2.1 written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/reg/mio-child-process/0.2.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] building mio-child-process-0.2.1 against master#c8865d8e195813ade6b84434ac9f8850e7112d1a for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-5/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/mio-child-process/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "build" "--frozen"`
[INFO] [stdout] 9a8fc4ab936a5dc9e0e0876e391932201b62ad9dcd8119fccff9c95e902599cf
[INFO] running `"docker" "start" "-a" "9a8fc4ab936a5dc9e0e0876e391932201b62ad9dcd8119fccff9c95e902599cf"`
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling mio-child-process v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Error` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:234:13
[INFO] [stderr]     |
[INFO] [stderr] 77  | use std::io::{Error, ErrorKind, Read, Result, Write};
[INFO] [stderr]     |               ----- the item `Error` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 234 |         use std::io::Error;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.67s
[INFO] running `"docker" "inspect" "9a8fc4ab936a5dc9e0e0876e391932201b62ad9dcd8119fccff9c95e902599cf"`
[INFO] running `"docker" "rm" "-f" "9a8fc4ab936a5dc9e0e0876e391932201b62ad9dcd8119fccff9c95e902599cf"`
[INFO] [stdout] 9a8fc4ab936a5dc9e0e0876e391932201b62ad9dcd8119fccff9c95e902599cf
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-5/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/reg/mio-child-process/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] b0f705da3264eda09d66b0ec94f196863a5de22d568161b92a389fbd062827fe
[INFO] running `"docker" "start" "-a" "b0f705da3264eda09d66b0ec94f196863a5de22d568161b92a389fbd062827fe"`
[INFO] [stderr]    Compiling mio-child-process v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `Error` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:234:13
[INFO] [stderr]     |
[INFO] [stderr] 77  | use std::io::{Error, ErrorKind, Read, Result, Write};
[INFO] [stderr]     |               ----- the item `Error` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 234 |         use std::io::Error;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "b0f705da3264eda09d66b0ec94f196863a5de22d568161b92a389fbd062827fe"`
[INFO] running `"docker" "rm" "-f" "b0f705da3264eda09d66b0ec94f196863a5de22d568161b92a389fbd062827fe"`
[INFO] [stdout] b0f705da3264eda09d66b0ec94f196863a5de22d568161b92a389fbd062827fe