[INFO] crate cobalt 0.22.0 is already in cache
[INFO] extracting crate cobalt 0.22.0 into work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/cobalt/0.22.0
[INFO] extracting crate cobalt 0.22.0 into work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/reg/cobalt/0.22.0
[INFO] validating manifest of cobalt-0.22.0 on toolchain master#a850a426491e14186af2250549bf41256b5938d2
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cobalt-0.22.0 on toolchain try#06a150c7d11500b41499224f165e9de1de096768
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cobalt-0.22.0
[INFO] finished frobbing cobalt-0.22.0
[INFO] frobbed toml for cobalt-0.22.0 written to work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/cobalt/0.22.0/Cargo.toml
[INFO] started frobbing cobalt-0.22.0
[INFO] finished frobbing cobalt-0.22.0
[INFO] frobbed toml for cobalt-0.22.0 written to work/ex/pr-60162/sources/try#06a150c7d11500b41499224f165e9de1de096768/reg/cobalt/0.22.0/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+a850a426491e14186af2250549bf41256b5938d2-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+06a150c7d11500b41499224f165e9de1de096768-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking cobalt-0.22.0 against master#a850a426491e14186af2250549bf41256b5938d2 for pr-60162
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60162/worker-4/master#a850a426491e14186af2250549bf41256b5938d2:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60162/sources/master#a850a426491e14186af2250549bf41256b5938d2/reg/cobalt/0.22.0:/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" "+a850a426491e14186af2250549bf41256b5938d2-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b73e0fd47d7eee1d9a76d65ebf0bedf39dfc427e8a068c62b2cbc98e07620917
[INFO] running `"docker" "start" "-a" "b73e0fd47d7eee1d9a76d65ebf0bedf39dfc427e8a068c62b2cbc98e07620917"`
[INFO] [stderr]     Checking cobalt v0.22.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/shared/connection.rs:425:25
[INFO] [stderr]     |
[INFO] [stderr] 425 |                         (cmp::max(self.last_receive_time - ack.time, tick_delay) - tick_delay)
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/shared/connection.rs:425:25
[INFO] [stderr]     |
[INFO] [stderr] 425 |                         (cmp::max(self.last_receive_time - ack.time, tick_delay) - tick_delay)
[INFO] [stderr]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]   --> examples/client.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         client.send(true).is_ok();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]   --> examples/server.rs:74:9
[INFO] [stderr]    |
[INFO] [stderr] 74 |         server.send(true).is_ok();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.63s
[INFO] running `"docker" "inspect" "b73e0fd47d7eee1d9a76d65ebf0bedf39dfc427e8a068c62b2cbc98e07620917"`
[INFO] running `"docker" "rm" "-f" "b73e0fd47d7eee1d9a76d65ebf0bedf39dfc427e8a068c62b2cbc98e07620917"`
[INFO] [stdout] b73e0fd47d7eee1d9a76d65ebf0bedf39dfc427e8a068c62b2cbc98e07620917