[INFO] fetching crate serde_bencode 0.2.4...
[INFO] checking serde_bencode-0.2.4 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate serde_bencode 0.2.4 into /workspace/builds/worker-3-tc1/source
[INFO] removed /workspace/builds/worker-3-tc1/source/.cargo/config.toml
[INFO] started tweaking crates.io crate serde_bencode 0.2.4
[INFO] finished tweaking crates.io crate serde_bencode 0.2.4
[INFO] tweaked toml for crates.io crate serde_bencode 0.2.4 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_bencode 0.2.4 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] crate crates.io crate serde_bencode 0.2.4 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] faab5ecf341459f0f714d828241f151991bddb4981a72b1c0fac8870838c7a5e
[INFO] running `Command { std: "docker" "start" "-a" "faab5ecf341459f0f714d828241f151991bddb4981a72b1c0fac8870838c7a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "faab5ecf341459f0f714d828241f151991bddb4981a72b1c0fac8870838c7a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faab5ecf341459f0f714d828241f151991bddb4981a72b1c0fac8870838c7a5e", kill_on_drop: false }`
[INFO] [stdout] faab5ecf341459f0f714d828241f151991bddb4981a72b1c0fac8870838c7a5e
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a83d3d120dc064441902f24ab1f8278ec4c00007b019367bfcecb1a14688db17
[INFO] running `Command { std: "docker" "start" "-a" "a83d3d120dc064441902f24ab1f8278ec4c00007b019367bfcecb1a14688db17", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking serde_bytes v0.11.12
[INFO] [stderr]     Checking serde_test v1.0.176
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]     Checking serde_bencode v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/ser.rs:95:22
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn new(ser: &'a mut Serializer, len: usize) -> SerializeMap<'_> {
[INFO] [stdout]    |                      ^^ this lifetime flows to the output           -- the lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 95 -     pub fn new(ser: &'a mut Serializer, len: usize) -> SerializeMap<'_> {
[INFO] [stdout] 95 +     pub fn new(ser: &'a mut Serializer, len: usize) -> SerializeMap<'a> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> examples/parse_torrent.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Node(String, i64);
[INFO] [stdout]   |        ---- ^^^^^^  ^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/ser.rs:95:22
[INFO] [stdout]    |
[INFO] [stdout] 95 |     pub fn new(ser: &'a mut Serializer, len: usize) -> SerializeMap<'_> {
[INFO] [stdout]    |                      ^^ this lifetime flows to the output           -- the lifetime gets resolved as `'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to consistently use `'a`
[INFO] [stdout]    |
[INFO] [stdout] 95 -     pub fn new(ser: &'a mut Serializer, len: usize) -> SerializeMap<'_> {
[INFO] [stdout] 95 +     pub fn new(ser: &'a mut Serializer, len: usize) -> SerializeMap<'a> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.84s
[INFO] running `Command { std: "docker" "inspect" "a83d3d120dc064441902f24ab1f8278ec4c00007b019367bfcecb1a14688db17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a83d3d120dc064441902f24ab1f8278ec4c00007b019367bfcecb1a14688db17", kill_on_drop: false }`
[INFO] [stdout] a83d3d120dc064441902f24ab1f8278ec4c00007b019367bfcecb1a14688db17