[INFO] fetching crate coap-handler 0.0.1...
[INFO] checking coap-handler-0.0.1 against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] extracting crate coap-handler 0.0.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate coap-handler 0.0.1 on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate coap-handler 0.0.1
[INFO] finished tweaking crates.io crate coap-handler 0.0.1
[INFO] tweaked toml for crates.io crate coap-handler 0.0.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f45e7f6426316cb937088be213e6841bab6eba67dd5bab59b3e462f278d23d19
[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" "f45e7f6426316cb937088be213e6841bab6eba67dd5bab59b3e462f278d23d19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f45e7f6426316cb937088be213e6841bab6eba67dd5bab59b3e462f278d23d19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f45e7f6426316cb937088be213e6841bab6eba67dd5bab59b3e462f278d23d19", kill_on_drop: false }`
[INFO] [stdout] f45e7f6426316cb937088be213e6841bab6eba67dd5bab59b3e462f278d23d19
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c62a4c309867df7f6a80ee59a27351260d087a6537997ba1390893ed2bd197fd
[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" "c62a4c309867df7f6a80ee59a27351260d087a6537997ba1390893ed2bd197fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]     Checking half v1.6.0
[INFO] [stderr]     Checking coap-numbers v0.1.2
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking windowed-infinity v0.1.1
[INFO] [stderr]     Checking coap-handler v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/helpers.rs:192:8
[INFO] [stdout]     |
[INFO] [stdout] 192 |     fn new(data: &'a mut [u8], cursor: isize) -> Self {
[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: `bytes_in_buffer`
[INFO] [stdout]    --> src/helpers.rs:197:8
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn bytes_in_buffer(&self) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cursor`
[INFO] [stdout]    --> src/helpers.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn cursor(&self) -> isize {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `etag`
[INFO] [stdout]    --> src/helpers.rs:209:8
[INFO] [stdout]     |
[INFO] [stdout] 209 |     fn etag(&self) -> u64 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `did_overflow`
[INFO] [stdout]    --> src/helpers.rs:213:8
[INFO] [stdout]     |
[INFO] [stdout] 213 |     fn did_overflow(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/implementations.rs:260:9
[INFO] [stdout]     |
[INFO] [stdout] 260 |         writer.write_str(*self);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]    --> src/helpers.rs:192:8
[INFO] [stdout]     |
[INFO] [stdout] 192 |     fn new(data: &'a mut [u8], cursor: isize) -> Self {
[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: `bytes_in_buffer`
[INFO] [stdout]    --> src/helpers.rs:197:8
[INFO] [stdout]     |
[INFO] [stdout] 197 |     fn bytes_in_buffer(&self) -> Option<usize> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cursor`
[INFO] [stdout]    --> src/helpers.rs:205:8
[INFO] [stdout]     |
[INFO] [stdout] 205 |     fn cursor(&self) -> isize {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `etag`
[INFO] [stdout]    --> src/helpers.rs:209:8
[INFO] [stdout]     |
[INFO] [stdout] 209 |     fn etag(&self) -> u64 {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `did_overflow`
[INFO] [stdout]    --> src/helpers.rs:213:8
[INFO] [stdout]     |
[INFO] [stdout] 213 |     fn did_overflow(&self) -> bool {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/implementations.rs:260:9
[INFO] [stdout]     |
[INFO] [stdout] 260 |         writer.write_str(*self);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.88s
[INFO] running `Command { std: "docker" "inspect" "c62a4c309867df7f6a80ee59a27351260d087a6537997ba1390893ed2bd197fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c62a4c309867df7f6a80ee59a27351260d087a6537997ba1390893ed2bd197fd", kill_on_drop: false }`
[INFO] [stdout] c62a4c309867df7f6a80ee59a27351260d087a6537997ba1390893ed2bd197fd