[INFO] fetching crate kvr 0.3.0...
[INFO] checking kvr-0.3.0 against try#09eeb2bacb9b40b2ed1d47f03177442c0632cda1 for pr-157710
[INFO] extracting crate kvr 0.3.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate kvr 0.3.0
[INFO] finished tweaking crates.io crate kvr 0.3.0
[INFO] tweaked toml for crates.io crate kvr 0.3.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate kvr 0.3.0 on toolchain 09eeb2bacb9b40b2ed1d47f03177442c0632cda1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate kvr 0.3.0 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" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] d315acb1f7da3861182d4b98ba7defaf824a66954d788c0b8be57d2b5cffe5ae
[INFO] running `Command { std: "docker" "start" "d315acb1f7da3861182d4b98ba7defaf824a66954d788c0b8be57d2b5cffe5ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d315acb1f7da3861182d4b98ba7defaf824a66954d788c0b8be57d2b5cffe5ae" "/opt/rustwide/cargo-home/bin/cargo" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d315acb1f7da3861182d4b98ba7defaf824a66954d788c0b8be57d2b5cffe5ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d315acb1f7da3861182d4b98ba7defaf824a66954d788c0b8be57d2b5cffe5ae" "/opt/rustwide/cargo-home/bin/cargo" "+09eeb2bacb9b40b2ed1d47f03177442c0632cda1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]    Compiling tokio v1.7.1
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling tokio-macros v1.2.0
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking ulid v0.4.1
[INFO] [stderr]     Checking kvr v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `historical_entries` is never read
[INFO] [stdout]   --> src/lib.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct KeyValueRevision<K: Sized + Copy + Clone, V: Sized + Copy + Clone> {
[INFO] [stdout]    |            ---------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 24 |     historical_entries: BTreeMap<KeyAtRevision<K>, ValueWithPrevRevRef<V>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `prev_rev` and `value` are never read
[INFO] [stdout]   --> src/data.rs:37:16
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub(crate) struct ValueWithPrevRevRef<V> {
[INFO] [stdout]    |                   ------------------- fields in this struct
[INFO] [stdout] 37 |     pub(crate) prev_rev: Option<Revision>,
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 38 |     pub(crate) value: V,
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `historical_entries` is never read
[INFO] [stdout]   --> src/lib.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct KeyValueRevision<K: Sized + Copy + Clone, V: Sized + Copy + Clone> {
[INFO] [stdout]    |            ---------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 24 |     historical_entries: BTreeMap<KeyAtRevision<K>, ValueWithPrevRevRef<V>>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `prev_rev` and `value` are never read
[INFO] [stdout]   --> src/data.rs:37:16
[INFO] [stdout]    |
[INFO] [stdout] 36 | pub(crate) struct ValueWithPrevRevRef<V> {
[INFO] [stdout]    |                   ------------------- fields in this struct
[INFO] [stdout] 37 |     pub(crate) prev_rev: Option<Revision>,
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout] 38 |     pub(crate) value: V,
[INFO] [stdout]    |                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/kvr.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let x = KeyValueRevision::<ExampleKey, u32>::try_init("example.db", true)
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/bin/kvr.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |     InitializationError(KVRInitializationError),
[INFO] [stdout]    |     ------------------- ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `KVRMainError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 25 -     InitializationError(KVRInitializationError),
[INFO] [stdout] 25 +     InitializationError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/kvr.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let x = KeyValueRevision::<ExampleKey, u32>::try_init("example.db", true)
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/bin/kvr.rs:25:25
[INFO] [stdout]    |
[INFO] [stdout] 25 |     InitializationError(KVRInitializationError),
[INFO] [stdout]    |     ------------------- ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `KVRMainError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 25 -     InitializationError(KVRInitializationError),
[INFO] [stdout] 25 +     InitializationError(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 15.46s
[INFO] running `Command { std: "docker" "inspect" "d315acb1f7da3861182d4b98ba7defaf824a66954d788c0b8be57d2b5cffe5ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d315acb1f7da3861182d4b98ba7defaf824a66954d788c0b8be57d2b5cffe5ae", kill_on_drop: false }`
[INFO] [stdout] d315acb1f7da3861182d4b98ba7defaf824a66954d788c0b8be57d2b5cffe5ae
