[INFO] fetching crate serde_bencode 0.2.4...
[INFO] checking serde_bencode-0.2.4 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate serde_bencode 0.2.4 into /workspace/builds/worker-0-tc2/source
[INFO] removed /workspace/builds/worker-0-tc2/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-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_bencode 0.2.4 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 519c4e3445ac7cfd0677b2f685c273c4af714773279b7117005616dd0f53af01
[INFO] running `Command { std: "docker" "start" "-a" "519c4e3445ac7cfd0677b2f685c273c4af714773279b7117005616dd0f53af01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "519c4e3445ac7cfd0677b2f685c273c4af714773279b7117005616dd0f53af01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "519c4e3445ac7cfd0677b2f685c273c4af714773279b7117005616dd0f53af01", kill_on_drop: false }`
[INFO] [stdout] 519c4e3445ac7cfd0677b2f685c273c4af714773279b7117005616dd0f53af01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fadac4fe97678037f03b903508507e67424f5f498ff4cec8d8b6591a301cb08
[INFO] running `Command { std: "docker" "start" "-a" "4fadac4fe97678037f03b903508507e67424f5f498ff4cec8d8b6591a301cb08", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling serde v1.0.188
[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: eliding a lifetime that's named elsewhere is 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]    |                      ^^ the lifetime is named here                  -- the same lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: 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: eliding a lifetime that's named elsewhere is 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]    |                      ^^ the lifetime is named here                  -- the same lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: 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: struct `Node` is never constructed
[INFO] [stdout]    --> tests/tests.rs:706:16
[INFO] [stdout]     |
[INFO] [stdout] 706 |         struct Node(String, i64);
[INFO] [stdout]     |                ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.86s
[INFO] running `Command { std: "docker" "inspect" "4fadac4fe97678037f03b903508507e67424f5f498ff4cec8d8b6591a301cb08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fadac4fe97678037f03b903508507e67424f5f498ff4cec8d8b6591a301cb08", kill_on_drop: false }`
[INFO] [stdout] 4fadac4fe97678037f03b903508507e67424f5f498ff4cec8d8b6591a301cb08