[INFO] fetching crate zenscan 0.1.3...
[INFO] checking zenscan-0.1.3 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate zenscan 0.1.3 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate zenscan 0.1.3 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zenscan 0.1.3
[INFO] finished tweaking crates.io crate zenscan 0.1.3
[INFO] tweaked toml for crates.io crate zenscan 0.1.3 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate zenscan 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 27a1d47a166b2ed9016718ab9a8e9fd7264d82af0f1a7824621bbb767c55d12a
[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" "27a1d47a166b2ed9016718ab9a8e9fd7264d82af0f1a7824621bbb767c55d12a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "27a1d47a166b2ed9016718ab9a8e9fd7264d82af0f1a7824621bbb767c55d12a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27a1d47a166b2ed9016718ab9a8e9fd7264d82af0f1a7824621bbb767c55d12a", kill_on_drop: false }`
[INFO] [stdout] 27a1d47a166b2ed9016718ab9a8e9fd7264d82af0f1a7824621bbb767c55d12a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 997ac1c730e2250176da4222d70dcffabeb5051c2655c8d1d8f1d046805d39a5
[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" "997ac1c730e2250176da4222d70dcffabeb5051c2655c8d1d8f1d046805d39a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling bitflags v0.5.0
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]     Checking pnet_base v0.26.0
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]    Compiling pnet v0.26.0
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling syntex_pos v0.42.0
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking pnet_sys v0.26.0
[INFO] [stderr]     Checking clicolors-control v1.0.1
[INFO] [stderr]     Checking termios v0.3.2
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking ipnetwork v0.16.0
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]     Checking crossbeam-utils v0.7.2
[INFO] [stderr]     Checking pnet_macros_support v0.26.0
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]     Checking dns-lookup v1.0.3
[INFO] [stderr]     Checking backtrace v0.3.48
[INFO] [stderr]     Checking pnet_datalink v0.26.0
[INFO] [stderr]     Checking crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking crossbeam-queue v0.2.2
[INFO] [stderr]    Compiling syntex_errors v0.42.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]    Compiling syntex_syntax v0.42.0
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking console v0.9.2
[INFO] [stderr]     Checking better-panic v0.2.0
[INFO] [stderr]    Compiling syntex v0.42.2
[INFO] [stderr]    Compiling pnet_macros v0.26.0
[INFO] [stderr]    Compiling pnet_packet v0.26.0
[INFO] [stderr]     Checking pnet_transport v0.26.0
[INFO] [stderr]     Checking zenscan v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `host` is never read
[INFO] [stdout]   --> src/main.rs:63:26
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let mut ip = ""; let mut host = ""; 
[INFO] [stdout]    |                          ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `host` is never read
[INFO] [stdout]   --> src/main.rs:63:26
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let mut ip = ""; let mut host = ""; 
[INFO] [stdout]    |                          ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 11s
[INFO] running `Command { std: "docker" "inspect" "997ac1c730e2250176da4222d70dcffabeb5051c2655c8d1d8f1d046805d39a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "997ac1c730e2250176da4222d70dcffabeb5051c2655c8d1d8f1d046805d39a5", kill_on_drop: false }`
[INFO] [stdout] 997ac1c730e2250176da4222d70dcffabeb5051c2655c8d1d8f1d046805d39a5