[INFO] fetching crate embedded-nal-minimal-coaptcpserver 0.2.0...
[INFO] checking embedded-nal-minimal-coaptcpserver-0.2.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate embedded-nal-minimal-coaptcpserver 0.2.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate embedded-nal-minimal-coaptcpserver 0.2.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate embedded-nal-minimal-coaptcpserver 0.2.0
[INFO] finished tweaking crates.io crate embedded-nal-minimal-coaptcpserver 0.2.0
[INFO] tweaked toml for crates.io crate embedded-nal-minimal-coaptcpserver 0.2.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 29 packages to latest compatible versions
[INFO] [stderr]       Adding coap-numbers v0.1.2 (latest: v0.2.4)
[INFO] [stderr]       Adding embedded-nal v0.6.0 (latest: v0.8.0)
[INFO] [stderr]       Adding hash32 v0.2.1 (latest: v0.3.1)
[INFO] [stderr]       Adding heapless v0.7.17 (latest: v0.8.0)
[INFO] [stderr]       Adding minicbor v0.19.1 (latest: v0.24.2)
[INFO] [stderr]       Adding no-std-net v0.5.0 (latest: v0.6.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded heapless v0.7.17
[INFO] [stderr]   Downloaded hash32 v0.3.1
[INFO] [stderr]   Downloaded coap-handler v0.2.0
[INFO] [stderr]   Downloaded heapless v0.8.0
[INFO] [stderr]   Downloaded coap-message v0.3.3
[INFO] [stderr]   Downloaded coap-message-utils v0.3.6
[INFO] [stderr]   Downloaded coap-numbers v0.2.4
[INFO] [stderr]   Downloaded coap-message-implementations v0.1.5
[INFO] [stderr]   Downloaded embedded-nal v0.6.0
[INFO] [stderr]   Downloaded atomic-polyfill v1.0.3
[INFO] [stderr]   Downloaded embedded-nal-tcpextensions v0.1.2
[INFO] [stderr]   Downloaded coap-numbers v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7cf1d2fe396c3be2d00e8e14f584de676c0c4f1474c8bcb05ebd8db12db20115
[INFO] running `Command { std: "docker" "start" "-a" "7cf1d2fe396c3be2d00e8e14f584de676c0c4f1474c8bcb05ebd8db12db20115", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7cf1d2fe396c3be2d00e8e14f584de676c0c4f1474c8bcb05ebd8db12db20115", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7cf1d2fe396c3be2d00e8e14f584de676c0c4f1474c8bcb05ebd8db12db20115", kill_on_drop: false }`
[INFO] [stdout] 7cf1d2fe396c3be2d00e8e14f584de676c0c4f1474c8bcb05ebd8db12db20115
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 62204e26073dd0d024b5614f0825a29c7e83f3e79c0479f20b69fbaba2d6439d
[INFO] running `Command { std: "docker" "start" "-a" "62204e26073dd0d024b5614f0825a29c7e83f3e79c0479f20b69fbaba2d6439d", kill_on_drop: false }`
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling minicbor v0.19.1
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]     Checking coap-numbers v0.2.4
[INFO] [stderr]     Checking no-std-net v0.5.0
[INFO] [stderr]     Checking hash32 v0.2.1
[INFO] [stderr]    Compiling document-features v0.2.10
[INFO] [stderr]     Checking hash32 v0.3.1
[INFO] [stderr]     Checking coap-numbers v0.1.2
[INFO] [stderr]     Checking coap-message v0.3.3
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]    Compiling heapless v0.7.17
[INFO] [stderr]     Checking coap-handler v0.2.0
[INFO] [stderr]     Checking embedded-nal v0.6.0
[INFO] [stderr]     Checking coap-message-utils v0.3.6
[INFO] [stderr]     Checking embedded-nal-tcpextensions v0.1.2
[INFO] [stderr]     Checking coap-message-implementations v0.1.5
[INFO] [stderr]     Checking embedded-nal-minimal-coaptcpserver v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lib.rs:689:17
[INFO] [stdout]     |
[INFO] [stdout] 689 |                 Ok(never) => match never {},
[INFO] [stdout]     |                 ^^^^^^^^^ matches no values because `Never` is uninhabited
[INFO] [stdout]     |
[INFO] [stdout]     = note: to learn more about uninhabited types, see https://doc.rust-lang.org/nomicon/exotic-sizes.html#empty-types
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]    --> src/lib.rs:689:17
[INFO] [stdout]     |
[INFO] [stdout] 689 |                 Ok(never) => match never {},
[INFO] [stdout]     |                 ^^^^^^^^^ matches no values because `Never` is uninhabited
[INFO] [stdout]     |
[INFO] [stdout]     = note: to learn more about uninhabited types, see https://doc.rust-lang.org/nomicon/exotic-sizes.html#empty-types
[INFO] [stdout]     = note: `#[warn(unreachable_patterns)]` on by default
[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` profile [unoptimized + debuginfo] target(s) in 2.80s
[INFO] running `Command { std: "docker" "inspect" "62204e26073dd0d024b5614f0825a29c7e83f3e79c0479f20b69fbaba2d6439d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62204e26073dd0d024b5614f0825a29c7e83f3e79c0479f20b69fbaba2d6439d", kill_on_drop: false }`
[INFO] [stdout] 62204e26073dd0d024b5614f0825a29c7e83f3e79c0479f20b69fbaba2d6439d