[INFO] fetching crate dns-protocol-patch 0.1.4...
[INFO] checking dns-protocol-patch-0.1.4 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate dns-protocol-patch 0.1.4 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate dns-protocol-patch 0.1.4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate dns-protocol-patch 0.1.4
[INFO] tweaked toml for crates.io crate dns-protocol-patch 0.1.4 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate dns-protocol-patch 0.1.4 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 dns-protocol-patch 0.1.4 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 735b07d8c953b25ec26c58b7d7ccb17e146d1d9db7f87fe4923502e736ae12c8
[INFO] running `Command { std: "docker" "start" "-a" "735b07d8c953b25ec26c58b7d7ccb17e146d1d9db7f87fe4923502e736ae12c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "735b07d8c953b25ec26c58b7d7ccb17e146d1d9db7f87fe4923502e736ae12c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "735b07d8c953b25ec26c58b7d7ccb17e146d1d9db7f87fe4923502e736ae12c8", kill_on_drop: false }`
[INFO] [stdout] 735b07d8c953b25ec26c58b7d7ccb17e146d1d9db7f87fe4923502e736ae12c8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] aafe034ca00f8cd1cc562f1aa66188e97b18a35904c8c19fa4f68f075000cd4c
[INFO] running `Command { std: "docker" "start" "-a" "aafe034ca00f8cd1cc562f1aa66188e97b18a35904c8c19fa4f68f075000cd4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.96
[INFO] [stderr]     Checking simdutf8 v0.1.5
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling derive_more-impl v2.0.1
[INFO] [stderr]     Checking derive_more v2.0.1
[INFO] [stderr]     Checking dns-protocol-patch v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<&[u8], Infallible>
[INFO] [stdout]    --> src/ser.rs:501:25
[INFO] [stdout]     |
[INFO] [stdout] 501 |               let bytes = cursor.remaining()[1..=len]
[INFO] [stdout]     |  _________________________^
[INFO] [stdout] 502 | |                 .try_into()
[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<&[u8], Infallible>
[INFO] [stdout]    --> src/ser.rs:501:25
[INFO] [stdout]     |
[INFO] [stdout] 501 |               let bytes = cursor.remaining()[1..=len]
[INFO] [stdout]     |  _________________________^
[INFO] [stdout] 502 | |                 .try_into()
[INFO] [stdout]     | |___________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dns-protocol-patch` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `dns-protocol-patch` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "aafe034ca00f8cd1cc562f1aa66188e97b18a35904c8c19fa4f68f075000cd4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aafe034ca00f8cd1cc562f1aa66188e97b18a35904c8c19fa4f68f075000cd4c", kill_on_drop: false }`
[INFO] [stdout] aafe034ca00f8cd1cc562f1aa66188e97b18a35904c8c19fa4f68f075000cd4c