[INFO] fetching crate son_of_grid_engine 0.2.0...
[INFO] checking son_of_grid_engine-0.2.0 against try#15a786332e2f0dd343b226ab6bb8ec028a350f73 for pr-81782
[INFO] extracting crate son_of_grid_engine 0.2.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate son_of_grid_engine 0.2.0 on toolchain 15a786332e2f0dd343b226ab6bb8ec028a350f73
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate son_of_grid_engine 0.2.0
[INFO] finished tweaking crates.io crate son_of_grid_engine 0.2.0
[INFO] tweaked toml for crates.io crate son_of_grid_engine 0.2.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bbf6c2c0223a5c22562fa4499e3384c8ac3316805f2ba9a103ac4c05001afb45
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bbf6c2c0223a5c22562fa4499e3384c8ac3316805f2ba9a103ac4c05001afb45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bbf6c2c0223a5c22562fa4499e3384c8ac3316805f2ba9a103ac4c05001afb45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbf6c2c0223a5c22562fa4499e3384c8ac3316805f2ba9a103ac4c05001afb45", kill_on_drop: false }`
[INFO] [stdout] bbf6c2c0223a5c22562fa4499e3384c8ac3316805f2ba9a103ac4c05001afb45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6740fbc21d9bcd401a128ff4d7b500aa3171b593d36eab829c4ef1fb5ca85a71
[INFO] running `Command { std: "docker" "start" "-a" "6740fbc21d9bcd401a128ff4d7b500aa3171b593d36eab829c4ef1fb5ca85a71", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking son_of_grid_engine v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_json v1.0.63
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stdout] warning: unused return value of `Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> examples/networking.rs:180:33
[INFO] [stdout]     |
[INFO] [stdout] 180 | ...                   write(stream.get_mut(), ips).is_ok();
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> examples/networking.rs:205:37
[INFO] [stdout]     |
[INFO] [stdout] 205 | ...                   write(stream.get_mut(), id).is_ok();
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.05s
[INFO] running `Command { std: "docker" "inspect" "6740fbc21d9bcd401a128ff4d7b500aa3171b593d36eab829c4ef1fb5ca85a71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6740fbc21d9bcd401a128ff4d7b500aa3171b593d36eab829c4ef1fb5ca85a71", kill_on_drop: false }`
[INFO] [stdout] 6740fbc21d9bcd401a128ff4d7b500aa3171b593d36eab829c4ef1fb5ca85a71