[INFO] updating cached repository dctk/chatserver_rust_sample
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dctk/chatserver_rust_sample
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dctk/chatserver_rust_sample" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/dctk/chatserver_rust_sample"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/dctk/chatserver_rust_sample'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dctk/chatserver_rust_sample" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/dctk/chatserver_rust_sample"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/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#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of dctk/chatserver_rust_sample on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-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-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/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-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/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/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking dctk/chatserver_rust_sample against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-6/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/dctk/chatserver_rust_sample:/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] eaf75d98f78590918af97184ed07042ed8858a878e41bf89b92f6d65010e6374
[INFO] running `"docker" "start" "-a" "eaf75d98f78590918af97184ed07042ed8858a878e41bf89b92f6d65010e6374"`
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking mio v0.6.19
[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 4.50s
[INFO] running `"docker" "inspect" "eaf75d98f78590918af97184ed07042ed8858a878e41bf89b92f6d65010e6374"`
[INFO] running `"docker" "rm" "-f" "eaf75d98f78590918af97184ed07042ed8858a878e41bf89b92f6d65010e6374"`
[INFO] [stdout] eaf75d98f78590918af97184ed07042ed8858a878e41bf89b92f6d65010e6374