[INFO] fetching crate post-sockets 0.1.0...
[INFO] checking post-sockets-0.1.0 against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] extracting crate post-sockets 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate post-sockets 0.1.0 on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate post-sockets 0.1.0
[INFO] finished tweaking crates.io crate post-sockets 0.1.0
[INFO] tweaked toml for crates.io crate post-sockets 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b3c3d65b6e40cfd01b285ba2a47964c42d8a7eb697ace8c6157de55bc5b875b6
[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" "b3c3d65b6e40cfd01b285ba2a47964c42d8a7eb697ace8c6157de55bc5b875b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3c3d65b6e40cfd01b285ba2a47964c42d8a7eb697ace8c6157de55bc5b875b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3c3d65b6e40cfd01b285ba2a47964c42d8a7eb697ace8c6157de55bc5b875b6", kill_on_drop: false }`
[INFO] [stdout] b3c3d65b6e40cfd01b285ba2a47964c42d8a7eb697ace8c6157de55bc5b875b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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] db7d378cb1ddfb4deb749a8006924dfe774792c2c87e84256e3c346b7ffb2ed3
[INFO] running `Command { std: "docker" "start" "-a" "db7d378cb1ddfb4deb749a8006924dfe774792c2c87e84256e3c346b7ffb2ed3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking post-sockets v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]   --> src/carrier.rs:34:24
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn send(&mut self, msg : &P::M) {
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/protocols/quic/mod.rs:71:30
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn decode_message(&self, data : &[u8]) -> Option<Self::M> {
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mesg`
[INFO] [stdout]   --> src/protocols/quic/mod.rs:75:30
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn encode_message(&self, mesg : &Self::M) -> &[u8] {
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_mesg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Carrier`
[INFO] [stdout]   --> src/carrier.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Carrier<P : Protocol> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `send`
[INFO] [stdout]   --> src/carrier.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn send(&mut self, msg : &P::M) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]   --> src/carrier.rs:34:24
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn send(&mut self, msg : &P::M) {
[INFO] [stdout]    |                        ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/protocols/quic/mod.rs:71:30
[INFO] [stdout]    |
[INFO] [stdout] 71 |     fn decode_message(&self, data : &[u8]) -> Option<Self::M> {
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mesg`
[INFO] [stdout]   --> src/protocols/quic/mod.rs:75:30
[INFO] [stdout]    |
[INFO] [stdout] 75 |     fn encode_message(&self, mesg : &Self::M) -> &[u8] {
[INFO] [stdout]    |                              ^^^^ help: if this is intentional, prefix it with an underscore: `_mesg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Carrier`
[INFO] [stdout]   --> src/carrier.rs:29:12
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub struct Carrier<P : Protocol> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `send`
[INFO] [stdout]   --> src/carrier.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn send(&mut self, msg : &P::M) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.44s
[INFO] running `Command { std: "docker" "inspect" "db7d378cb1ddfb4deb749a8006924dfe774792c2c87e84256e3c346b7ffb2ed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db7d378cb1ddfb4deb749a8006924dfe774792c2c87e84256e3c346b7ffb2ed3", kill_on_drop: false }`
[INFO] [stdout] db7d378cb1ddfb4deb749a8006924dfe774792c2c87e84256e3c346b7ffb2ed3