[INFO] updating cached repository lilydjwg/pid_children
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lilydjwg/pid_children
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lilydjwg/pid_children" "work/ex/beta-1.38-1/sources/1.37.0/gh/lilydjwg/pid_children"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lilydjwg/pid_children'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lilydjwg/pid_children" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lilydjwg/pid_children"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lilydjwg/pid_children'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a0b9f138fa0c4eb77566afc763c114153cb5c1a9
[INFO] sha for GitHub repo lilydjwg/pid_children: a0b9f138fa0c4eb77566afc763c114153cb5c1a9
[INFO] validating manifest of lilydjwg/pid_children 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 lilydjwg/pid_children 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 lilydjwg/pid_children
[INFO] finished frobbing lilydjwg/pid_children
[INFO] frobbed toml for lilydjwg/pid_children written to work/ex/beta-1.38-1/sources/1.37.0/gh/lilydjwg/pid_children/Cargo.toml
[INFO] started frobbing lilydjwg/pid_children
[INFO] finished frobbing lilydjwg/pid_children
[INFO] frobbed toml for lilydjwg/pid_children written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lilydjwg/pid_children/Cargo.toml
[INFO] crate lilydjwg/pid_children already has a lockfile, it will not be regenerated
[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 lilydjwg/pid_children 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/gh/lilydjwg/pid_children:/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] fc9bca2ffa691f63a8c010a6c78b52eded6afeface407e950ead6136e7c9ce67
[INFO] running `"docker" "start" "-a" "fc9bca2ffa691f63a8c010a6c78b52eded6afeface407e950ead6136e7c9ce67"`
[INFO] [stderr]    Compiling pid_children v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:12:21
[INFO] [stderr]    |
[INFO] [stderr] 12 |                 let mut children = children_map.entry(ppid).or_insert_with(Vec::new);
[INFO] [stderr]    |                     ----^^^^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.48s
[INFO] running `"docker" "inspect" "fc9bca2ffa691f63a8c010a6c78b52eded6afeface407e950ead6136e7c9ce67"`
[INFO] running `"docker" "rm" "-f" "fc9bca2ffa691f63a8c010a6c78b52eded6afeface407e950ead6136e7c9ce67"`
[INFO] [stdout] fc9bca2ffa691f63a8c010a6c78b52eded6afeface407e950ead6136e7c9ce67
[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/gh/lilydjwg/pid_children:/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] c44c23f4a0ae80db9e5fec792e7ba26f45de0995ebf4146da3a2adf534c06462
[INFO] running `"docker" "start" "-a" "c44c23f4a0ae80db9e5fec792e7ba26f45de0995ebf4146da3a2adf534c06462"`
[INFO] [stderr]    Compiling pid_children v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:12:21
[INFO] [stderr]    |
[INFO] [stderr] 12 |                 let mut children = children_map.entry(ppid).or_insert_with(Vec::new);
[INFO] [stderr]    |                     ----^^^^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `"docker" "inspect" "c44c23f4a0ae80db9e5fec792e7ba26f45de0995ebf4146da3a2adf534c06462"`
[INFO] running `"docker" "rm" "-f" "c44c23f4a0ae80db9e5fec792e7ba26f45de0995ebf4146da3a2adf534c06462"`
[INFO] [stdout] c44c23f4a0ae80db9e5fec792e7ba26f45de0995ebf4146da3a2adf534c06462
[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/gh/lilydjwg/pid_children:/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] fe87e936c0e9bb6271445030057efb8cac7803e3f6987e6189d67e87c6f1d5b8
[INFO] running `"docker" "start" "-a" "fe87e936c0e9bb6271445030057efb8cac7803e3f6987e6189d67e87c6f1d5b8"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/pid_children-73bd6259ecaad549
[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" "fe87e936c0e9bb6271445030057efb8cac7803e3f6987e6189d67e87c6f1d5b8"`
[INFO] running `"docker" "rm" "-f" "fe87e936c0e9bb6271445030057efb8cac7803e3f6987e6189d67e87c6f1d5b8"`
[INFO] [stdout] fe87e936c0e9bb6271445030057efb8cac7803e3f6987e6189d67e87c6f1d5b8