[INFO] updating cached repository dbeck/tcp-echo-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dbeck/tcp-echo-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dbeck/tcp-echo-rs" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/dbeck/tcp-echo-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/dbeck/tcp-echo-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dbeck/tcp-echo-rs" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/dbeck/tcp-echo-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/dbeck/tcp-echo-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bb4c07335482d0063fba3f0cc7d41d32a46f510b
[INFO] sha for GitHub repo dbeck/tcp-echo-rs: bb4c07335482d0063fba3f0cc7d41d32a46f510b
[INFO] validating manifest of dbeck/tcp-echo-rs on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dbeck/tcp-echo-rs on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dbeck/tcp-echo-rs
[INFO] finished frobbing dbeck/tcp-echo-rs
[INFO] frobbed toml for dbeck/tcp-echo-rs written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/dbeck/tcp-echo-rs/Cargo.toml
[INFO] started frobbing dbeck/tcp-echo-rs
[INFO] finished frobbing dbeck/tcp-echo-rs
[INFO] frobbed toml for dbeck/tcp-echo-rs written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/dbeck/tcp-echo-rs/Cargo.toml
[INFO] crate dbeck/tcp-echo-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/dbeck/tcp-echo-rs/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking dbeck/tcp-echo-rs against try#58b21121d0b447ceb3f1a655155d802191acf044 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-0/try#58b21121d0b447ceb3f1a655155d802191acf044:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/dbeck/tcp-echo-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 1ead9e1f649ecaa3f887894d28e8ae76cb03575e4f8f73b73cf2ff7f749c6c6d
[INFO] running `"docker" "start" "-a" "1ead9e1f649ecaa3f887894d28e8ae76cb03575e4f8f73b73cf2ff7f749c6c6d"`
[INFO] [stderr]     Checking lossyq v0.1.19
[INFO] [stderr]     Checking acto-rs v0.4.0
[INFO] [stderr]     Checking tcp-echo v0.1.3 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `channel_id`
[INFO] [stderr]   --> src/handle_parsed.rs:12:59
[INFO] [stderr]    |
[INFO] [stderr] 12 |     if let &mut ChannelWrapper::ConnectedReceiver(ref mut channel_id,
[INFO] [stderr]    |                                                           ^^^^^^^^^^ help: consider prefixing with an underscore: `_channel_id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `channel_id`
[INFO] [stderr]   --> src/handle_parsed.rs:12:59
[INFO] [stderr]    |
[INFO] [stderr] 12 |     if let &mut ChannelWrapper::ConnectedReceiver(ref mut channel_id,
[INFO] [stderr]    |                                                           ^^^^^^^^^^ help: consider prefixing with an underscore: `_channel_id`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.44s
[INFO] running `"docker" "inspect" "1ead9e1f649ecaa3f887894d28e8ae76cb03575e4f8f73b73cf2ff7f749c6c6d"`
[INFO] running `"docker" "rm" "-f" "1ead9e1f649ecaa3f887894d28e8ae76cb03575e4f8f73b73cf2ff7f749c6c6d"`
[INFO] [stdout] 1ead9e1f649ecaa3f887894d28e8ae76cb03575e4f8f73b73cf2ff7f749c6c6d