[INFO] cloning repository https://github.com/sankar-boro/hacking-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sankar-boro/hacking-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsankar-boro%2Fhacking-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsankar-boro%2Fhacking-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1bfd7479026b5782617b1f0e0f1d528d1802ac74
[INFO] checking sankar-boro/hacking-in-rust against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsankar-boro%2Fhacking-in-rust" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sankar-boro/hacking-in-rust on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sankar-boro/hacking-in-rust
[INFO] finished tweaking git repo https://github.com/sankar-boro/hacking-in-rust
[INFO] tweaked toml for git repo https://github.com/sankar-boro/hacking-in-rust written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/sankar-boro/hacking-in-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c4b6513103cfef8deb9d9827d3aa8e1faffba98ac78d4eafa4d6c84622bf573
[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" "0c4b6513103cfef8deb9d9827d3aa8e1faffba98ac78d4eafa4d6c84622bf573", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c4b6513103cfef8deb9d9827d3aa8e1faffba98ac78d4eafa4d6c84622bf573", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c4b6513103cfef8deb9d9827d3aa8e1faffba98ac78d4eafa4d6c84622bf573", kill_on_drop: false }`
[INFO] [stdout] 0c4b6513103cfef8deb9d9827d3aa8e1faffba98ac78d4eafa4d6c84622bf573
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4794c1578b04b6c8e003da0846240b37821d61956ec3c0b70bdc30ddae263432
[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" "4794c1578b04b6c8e003da0846240b37821d61956ec3c0b70bdc30ddae263432", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking futures-core v0.3.6
[INFO] [stderr]     Checking futures-io v0.3.6
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]     Checking futures-sink v0.3.6
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling pcap v0.7.0
[INFO] [stderr]     Checking http_parse v0.1.0 (/opt/rustwide/workdir/http_parse)
[INFO] [stderr]     Checking design-patterns v0.1.0 (/opt/rustwide/workdir/design-patterns)
[INFO] [stderr]     Checking working_with_strings v0.1.0 (/opt/rustwide/workdir/working_with_strings)
[INFO] [stderr]     Checking working_with_http v0.1.0 (/opt/rustwide/workdir/working_with_http)
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> http_parse/src/main.rs:28:16
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn respond(data: &[u8]) -> String {
[INFO] [stdout]    |                ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `HttpBytes`
[INFO] [stdout]  --> http_parse/src/main.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum HttpBytes {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]  --> working_with_strings/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::str;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> http_parse/src/main.rs:28:16
[INFO] [stdout]    |
[INFO] [stdout] 28 |     fn respond(data: &[u8]) -> String {
[INFO] [stdout]    |                ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factory`
[INFO] [stdout]   --> working_with_strings/src/main.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new(factory: impl Responder) {}
[INFO] [stdout]    |            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_factory`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `HttpBytes`
[INFO] [stdout]  --> http_parse/src/main.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum HttpBytes {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `body`
[INFO] [stdout]  --> working_with_strings/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     body: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking futures-task v0.3.6
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling pcap-sys v0.1.3
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]  --> working_with_strings/src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::str;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `factory`
[INFO] [stdout]   --> working_with_strings/src/main.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn new(factory: impl Responder) {}
[INFO] [stdout]    |            ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_factory`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `body`
[INFO] [stdout]  --> working_with_strings/src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     body: String,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]     Checking futures-channel v0.3.6
[INFO] [stderr]     Checking futures-lite v1.11.1
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stderr]     Checking polling v1.1.0
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking signal-hook-registry v1.2.1
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking socket2 v0.3.15
[INFO] [stderr]     Checking net2 v0.2.35
[INFO] [stderr]     Checking signal-hook v0.1.16
[INFO] [stderr]     Checking blocking v0.4.7
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-io v1.1.6
[INFO] [stderr]     Checking async-executor v1.3.0
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]     Checking async-net v1.4.7
[INFO] [stderr]     Checking async-process v1.0.1
[INFO] [stderr]     Checking smol v1.2.4
[INFO] [stderr]    Compiling pin-project-internal v0.4.27
[INFO] [stderr]    Compiling futures-macro v0.3.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.21
[INFO] [stderr]     Checking thiserror v1.0.21
[INFO] [stderr]     Checking pin-project v0.4.27
[INFO] [stderr]     Checking futures-util v0.3.6
[INFO] [stderr]     Checking futures-executor v0.3.6
[INFO] [stderr]     Checking smol v0.1.18
[INFO] [stderr]     Checking futures v0.3.6
[INFO] [stderr]     Checking pcap-async v0.3.0
[INFO] [stderr]     Checking working_with_pcap v0.1.0 (/opt/rustwide/workdir/working_with_pcap)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.89s
[INFO] running `Command { std: "docker" "inspect" "4794c1578b04b6c8e003da0846240b37821d61956ec3c0b70bdc30ddae263432", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4794c1578b04b6c8e003da0846240b37821d61956ec3c0b70bdc30ddae263432", kill_on_drop: false }`
[INFO] [stdout] 4794c1578b04b6c8e003da0846240b37821d61956ec3c0b70bdc30ddae263432