[INFO] updating cached repository alishir/ping-pong
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alishir/ping-pong
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alishir/ping-pong" "work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/alishir/ping-pong"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/alishir/ping-pong'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alishir/ping-pong" "work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/alishir/ping-pong"`
[INFO] [stderr] Cloning into 'work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/alishir/ping-pong'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9ee8b24817a4a4526554ffa1e5ee795fe6d0f241
[INFO] sha for GitHub repo alishir/ping-pong: 9ee8b24817a4a4526554ffa1e5ee795fe6d0f241
[INFO] validating manifest of alishir/ping-pong on toolchain master#e2f221c75932de7a29845c8d6f1f73536ad00c41
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of alishir/ping-pong on toolchain try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing alishir/ping-pong
[INFO] finished frobbing alishir/ping-pong
[INFO] frobbed toml for alishir/ping-pong written to work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/alishir/ping-pong/Cargo.toml
[INFO] started frobbing alishir/ping-pong
[INFO] finished frobbing alishir/ping-pong
[INFO] frobbed toml for alishir/ping-pong written to work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/gh/alishir/ping-pong/Cargo.toml
[INFO] crate alishir/ping-pong has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking alishir/ping-pong against master#e2f221c75932de7a29845c8d6f1f73536ad00c41 for pr-57617
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57617/worker-3/master#e2f221c75932de7a29845c8d6f1f73536ad00c41:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/gh/alishir/ping-pong:/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" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 368f2d4e4f2e8abe8fd8b6e61e91b54e9be85efb8af42215e85d4724d8b99f66
[INFO] running `"docker" "start" "-a" "368f2d4e4f2e8abe8fd8b6e61e91b54e9be85efb8af42215e85d4724d8b99f66"`
[INFO] [stderr]     Checking ping-ack-pong v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]   --> src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use tokio::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `msg`
[INFO] [stderr]   --> src/main.rs:77:16
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn handle_ping(msg: Msg) -> Box<Stream<Item = Msg, Error = io::Error> + Send> {
[INFO] [stderr]    |                ^^^ help: consider using `_msg` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `msg`
[INFO] [stderr]   --> src/main.rs:93:16
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn handle_pong(msg: Msg) -> Box<Stream<Item = Msg, Error = io::Error> + Send> {
[INFO] [stderr]    |                ^^^ help: consider using `_msg` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `msg`
[INFO] [stderr]    --> src/main.rs:104:19
[INFO] [stderr]     |
[INFO] [stderr] 104 | fn handle_default(msg: Msg) -> Box<Stream<Item = Msg, Error = io::Error> + Send> {
[INFO] [stderr]     |                   ^^^ help: consider using `_msg` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/ping_agg.rs:30:40
[INFO] [stderr]    |
[INFO] [stderr] 30 |                             .map(move |size| println!("buf is: {:?}", buf))
[INFO] [stderr]    |                                        ^^^^ help: consider using `_size` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/ping_agg.rs:30:40
[INFO] [stderr]    |
[INFO] [stderr] 30 |                             .map(move |size| println!("buf is: {:?}", buf))
[INFO] [stderr]    |                                        ^^^^ help: consider using `_size` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/ping_agg2.rs:28:36
[INFO] [stderr]    |
[INFO] [stderr] 28 |                         .map(move |size| println!("buf is: {:?}", buf))
[INFO] [stderr]    |                                    ^^^^ help: consider using `_size` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/ping_agg2.rs:37:25
[INFO] [stderr]    |
[INFO] [stderr] 37 |                     Err(e) => println!("here is p"),
[INFO] [stderr]    |                         ^ help: consider using `_e` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `tokio::prelude`
[INFO] [stderr]   --> src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use tokio::prelude::*;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `msg`
[INFO] [stderr]   --> src/main.rs:77:16
[INFO] [stderr]    |
[INFO] [stderr] 77 | fn handle_ping(msg: Msg) -> Box<Stream<Item = Msg, Error = io::Error> + Send> {
[INFO] [stderr]    |                ^^^ help: consider using `_msg` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `msg`
[INFO] [stderr]   --> src/main.rs:93:16
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn handle_pong(msg: Msg) -> Box<Stream<Item = Msg, Error = io::Error> + Send> {
[INFO] [stderr]    |                ^^^ help: consider using `_msg` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `msg`
[INFO] [stderr]    --> src/main.rs:104:19
[INFO] [stderr]     |
[INFO] [stderr] 104 | fn handle_default(msg: Msg) -> Box<Stream<Item = Msg, Error = io::Error> + Send> {
[INFO] [stderr]     |                   ^^^ help: consider using `_msg` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `size`
[INFO] [stderr]   --> src/ping_agg2.rs:28:36
[INFO] [stderr]    |
[INFO] [stderr] 28 |                         .map(move |size| println!("buf is: {:?}", buf))
[INFO] [stderr]    |                                    ^^^^ help: consider using `_size` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/ping_agg2.rs:37:25
[INFO] [stderr]    |
[INFO] [stderr] 37 |                     Err(e) => println!("here is p"),
[INFO] [stderr]    |                         ^ help: consider using `_e` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.25s
[INFO] running `"docker" "inspect" "368f2d4e4f2e8abe8fd8b6e61e91b54e9be85efb8af42215e85d4724d8b99f66"`
[INFO] running `"docker" "rm" "-f" "368f2d4e4f2e8abe8fd8b6e61e91b54e9be85efb8af42215e85d4724d8b99f66"`
[INFO] [stdout] 368f2d4e4f2e8abe8fd8b6e61e91b54e9be85efb8af42215e85d4724d8b99f66