[INFO] cloning repository dctk/chatserver_rust_sample
[INFO] running `"git" "clone" "--bare" "git://github.com/dctk/chatserver_rust_sample.git" "work/cache/sources/gh/dctk/chatserver_rust_sample"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/dctk/chatserver_rust_sample'...
[INFO] running `"git" "clone" "work/cache/sources/gh/dctk/chatserver_rust_sample" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/dctk/chatserver_rust_sample"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/dctk/chatserver_rust_sample'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dctk/chatserver_rust_sample" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/dctk/chatserver_rust_sample"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/dctk/chatserver_rust_sample'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 882e907a97202e88ef876cd38e7d9ac0389bcdae
[INFO] sha for GitHub repo dctk/chatserver_rust_sample: 882e907a97202e88ef876cd38e7d9ac0389bcdae
[INFO] validating manifest of dctk/chatserver_rust_sample on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dctk/chatserver_rust_sample on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing dctk/chatserver_rust_sample
[INFO] finished frobbing dctk/chatserver_rust_sample
[INFO] frobbed toml for dctk/chatserver_rust_sample written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/dctk/chatserver_rust_sample/Cargo.toml
[INFO] started frobbing dctk/chatserver_rust_sample
[INFO] finished frobbing dctk/chatserver_rust_sample
[INFO] frobbed toml for dctk/chatserver_rust_sample written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/dctk/chatserver_rust_sample/Cargo.toml
[INFO] crate dctk/chatserver_rust_sample already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking dctk/chatserver_rust_sample against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-2/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/dctk/chatserver_rust_sample:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] fd80be9bc420cd6afb1117731208e7adc17f133d771850b7d522b0eec4d8c953
[INFO] running `"docker" "start" "-a" "fd80be9bc420cd6afb1117731208e7adc17f133d771850b7d522b0eec4d8c953"`
[INFO] [stderr]     Checking chatserver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: value assigned to `message_len` is never read
[INFO] [stderr]    --> src/main.rs:138:45
[INFO] [stderr]     |
[INFO] [stderr] 138 |                                     let mut message_len: usize = 0;
[INFO] [stderr]     |                                             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `message_len` is never read
[INFO] [stderr]    --> src/main.rs:138:45
[INFO] [stderr]     |
[INFO] [stderr] 138 |                                     let mut message_len: usize = 0;
[INFO] [stderr]     |                                             ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `"docker" "inspect" "fd80be9bc420cd6afb1117731208e7adc17f133d771850b7d522b0eec4d8c953"`
[INFO] running `"docker" "rm" "-f" "fd80be9bc420cd6afb1117731208e7adc17f133d771850b7d522b0eec4d8c953"`
[INFO] [stdout] fd80be9bc420cd6afb1117731208e7adc17f133d771850b7d522b0eec4d8c953