[INFO] fetching crate coap-handler-implementations 0.6.1...
[INFO] checking coap-handler-implementations-0.6.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate coap-handler-implementations 0.6.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate coap-handler-implementations 0.6.1
[INFO] finished tweaking crates.io crate coap-handler-implementations 0.6.1
[INFO] tweaked toml for crates.io crate coap-handler-implementations 0.6.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate coap-handler-implementations 0.6.1 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate coap-handler-implementations 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5a0e1749c19b3c388de7db1205574aa75ccc36ab73781c4d835fb060d9beb7d8
[INFO] running `Command { std: "docker" "start" "-a" "5a0e1749c19b3c388de7db1205574aa75ccc36ab73781c4d835fb060d9beb7d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a0e1749c19b3c388de7db1205574aa75ccc36ab73781c4d835fb060d9beb7d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a0e1749c19b3c388de7db1205574aa75ccc36ab73781c4d835fb060d9beb7d8", kill_on_drop: false }`
[INFO] [stdout] 5a0e1749c19b3c388de7db1205574aa75ccc36ab73781c4d835fb060d9beb7d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91b5bdcbcbf701ca5148325f03a373bb23eacfb7b7448eedce9001b48b63da09
[INFO] running `Command { std: "docker" "start" "-a" "91b5bdcbcbf701ca5148325f03a373bb23eacfb7b7448eedce9001b48b63da09", kill_on_drop: false }`
[INFO] [stderr]     Checking embedded-io v0.7.1
[INFO] [stderr]    Compiling litrs v0.4.2
[INFO] [stderr]    Compiling minicbor v2.1.1
[INFO] [stderr]     Checking coap-numbers v0.2.7
[INFO] [stderr]     Checking crc v3.3.0
[INFO] [stderr]     Checking heapless v0.9.1
[INFO] [stderr]     Checking coap-message v0.3.6
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking coap-handler v0.2.1
[INFO] [stderr]     Checking embedded-io-adapters v0.7.0
[INFO] [stderr]     Checking windowed-infinity v0.2.0
[INFO] [stderr]     Checking tee-embedded-io v0.1.0
[INFO] [stderr]     Checking extra-embedded-io-adapters v0.1.0
[INFO] [stderr]    Compiling document-features v0.2.11
[INFO] [stderr]     Checking cboritem v0.1.3
[INFO] [stderr]     Checking coap-message-utils v0.3.9
[INFO] [stderr]     Checking minicbor-adapters v0.0.8
[INFO] [stderr]     Checking coap-handler-implementations v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/embedded_io.rs:27:67
[INFO] [stdout]    |
[INFO] [stdout] 27 |       fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________________^
[INFO] [stdout] 28 | |         self.0.write(buf)
[INFO] [stdout] 29 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/embedded_io.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         self.0.write(buf)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `coap-handler-implementations` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/embedded_io.rs:27:67
[INFO] [stdout]    |
[INFO] [stdout] 27 |       fn write(&mut self, buf: &[u8]) -> Result<usize, Self::Error> {
[INFO] [stdout]    |  ___________________________________________________________________^
[INFO] [stdout] 28 | |         self.0.write(buf)
[INFO] [stdout] 29 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]   --> src/embedded_io.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         self.0.write(buf)
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `coap-handler-implementations` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "91b5bdcbcbf701ca5148325f03a373bb23eacfb7b7448eedce9001b48b63da09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91b5bdcbcbf701ca5148325f03a373bb23eacfb7b7448eedce9001b48b63da09", kill_on_drop: false }`
[INFO] [stdout] 91b5bdcbcbf701ca5148325f03a373bb23eacfb7b7448eedce9001b48b63da09