[INFO] fetching crate dlhn_derive 0.1.1...
[INFO] checking dlhn_derive-0.1.1 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate dlhn_derive 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate dlhn_derive 0.1.1
[INFO] finished tweaking crates.io crate dlhn_derive 0.1.1
[INFO] tweaked toml for crates.io crate dlhn_derive 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dlhn_derive 0.1.1 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.104)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 502f8e0a8cda009241ee35b01bb3469e8d114a3ccdc5b402cbbc8d170337c4c0
[INFO] running `Command { std: "docker" "start" "-a" "502f8e0a8cda009241ee35b01bb3469e8d114a3ccdc5b402cbbc8d170337c4c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "502f8e0a8cda009241ee35b01bb3469e8d114a3ccdc5b402cbbc8d170337c4c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "502f8e0a8cda009241ee35b01bb3469e8d114a3ccdc5b402cbbc8d170337c4c0", kill_on_drop: false }`
[INFO] [stdout] 502f8e0a8cda009241ee35b01bb3469e8d114a3ccdc5b402cbbc8d170337c4c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 289379b20422635480a6cd1817c9e08a1fb3fb4ce9cbacb766368f701db63b0c
[INFO] running `Command { std: "docker" "start" "-a" "289379b20422635480a6cd1817c9e08a1fb3fb4ce9cbacb766368f701db63b0c", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking proc-macro2 v1.0.95
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking dlhn_derive v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `PREFIX_VARINT_BUF_SIZE` and `decode_prefix_varint` are never used
[INFO] [stdout]  --> src/prefix_varint.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub(crate) trait PrefixVarint<const N: usize>: Sized {
[INFO] [stdout]   |                  ------------ associated items in this trait
[INFO] [stdout] 6 |     const PREFIX_VARINT_BUF_SIZE: usize = N;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 |     fn decode_prefix_varint(reader: &mut impl Read) -> Result<Self>;
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decode_prefix` is never used
[INFO] [stdout]   --> src/prefix_varint.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn decode_prefix(reader: &mut impl Read) -> Result<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.66s
[INFO] running `Command { std: "docker" "inspect" "289379b20422635480a6cd1817c9e08a1fb3fb4ce9cbacb766368f701db63b0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "289379b20422635480a6cd1817c9e08a1fb3fb4ce9cbacb766368f701db63b0c", kill_on_drop: false }`
[INFO] [stdout] 289379b20422635480a6cd1817c9e08a1fb3fb4ce9cbacb766368f701db63b0c