[INFO] fetching crate pagecache 0.19.4...
[INFO] checking pagecache-0.19.4 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate pagecache 0.19.4 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate pagecache 0.19.4 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pagecache 0.19.4
[INFO] finished tweaking crates.io crate pagecache 0.19.4
[INFO] tweaked toml for crates.io crate pagecache 0.19.4 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fail v0.3.0
[INFO] [stderr]   Downloaded zstd-safe v1.4.13+zstd.1.4.3
[INFO] [stderr]   Downloaded zstd v0.4.28+zstd.1.4.3
[INFO] [stderr]   Downloaded zstd-sys v1.4.13+zstd.1.4.3
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5bc312f20387291f9c24f445df2534339b0a28baab7b9ce1025a75cd5144e5d8
[INFO] running `Command { std: "docker" "start" "-a" "5bc312f20387291f9c24f445df2534339b0a28baab7b9ce1025a75cd5144e5d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5bc312f20387291f9c24f445df2534339b0a28baab7b9ce1025a75cd5144e5d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bc312f20387291f9c24f445df2534339b0a28baab7b9ce1025a75cd5144e5d8", kill_on_drop: false }`
[INFO] [stdout] 5bc312f20387291f9c24f445df2534339b0a28baab7b9ce1025a75cd5144e5d8
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 59f591c2b19a004c2919c2c1089ee958c31ce9b56a3dd97d5262ac96e0a86271
[INFO] running `Command { std: "docker" "start" "-a" "59f591c2b19a004c2919c2c1089ee958c31ce9b56a3dd97d5262ac96e0a86271", kill_on_drop: false }`
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[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling arrayvec v0.4.12
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[INFO] [stderr]    Compiling memoffset v0.5.6
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[INFO] [stderr]     Checking lock_api v0.3.4
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[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.57
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking pagecache v0.19.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `deserialize` is imported redundantly
[INFO] [stdout]   --> src/config.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | use bincode::{deserialize, serialize};
[INFO] [stdout]    |               ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 | use super::{LogReader, *};
[INFO] [stdout]    |                        - the item `deserialize` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serialize` is imported redundantly
[INFO] [stdout]   --> src/config.rs:13:28
[INFO] [stdout]    |
[INFO] [stdout] 13 | use bincode::{deserialize, serialize};
[INFO] [stdout]    |                            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 | use super::{LogReader, *};
[INFO] [stdout]    |                        - the item `serialize` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `LogReader` is imported redundantly
[INFO] [stdout]   --> src/config.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 | use super::{LogReader, *};
[INFO] [stdout]    |             ^^^^^^^^^  - the item `LogReader` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `DoublyLinkedList`, `Item`
[INFO] [stdout]  --> src/ds/mod.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use self::dll::{DoublyLinkedList, Item};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SeqCst` is imported redundantly
[INFO] [stdout]  --> src/iobuf.rs:2:31
[INFO] [stdout]   |
[INFO] [stdout] 2 |     sync::atomic::AtomicBool, sync::atomic::Ordering::SeqCst, sync::Arc,
[INFO] [stdout]   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 | use super::*;
[INFO] [stdout]   |     -------- the item `SeqCst` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `LogReader` is imported redundantly
[INFO] [stdout]  --> src/iobuf.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::reader::LogReader;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 8 |
[INFO] [stdout] 9 | use super::*;
[INFO] [stdout]   |     -------- the item `LogReader` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `io` is imported redundantly
[INFO] [stdout]  --> src/iterator.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::BTreeMap, io};
[INFO] [stdout]   |                                  ^^
[INFO] [stdout] ...
[INFO] [stdout] 5 | use super::*;
[INFO] [stdout]   |     -------- the item `io` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `LogReader` is imported redundantly
[INFO] [stdout]  --> src/iterator.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::reader::LogReader;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use super::*;
[INFO] [stdout]   |     -------- the item `LogReader` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/iterator.rs:257:6
[INFO] [stdout]     |
[INFO] [stdout] 257 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Pio` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::Pio;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use super::*;
[INFO] [stdout]   |     -------- the item `Pio` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `PartialEq` is imported redundantly
[INFO] [stdout]  --> src/result.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     cmp::PartialEq,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/30f74ff0dc4d66debc8b50724c446f817e5f75f4/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `PartialEq` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `fmt` is imported redundantly
[INFO] [stdout]  --> src/result.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fmt::{self, Display},
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 8 | use super::*;
[INFO] [stdout]   |     -------- the item `fmt` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `io` is imported redundantly
[INFO] [stdout]  --> src/result.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     io,
[INFO] [stdout]   |     ^^
[INFO] [stdout] ...
[INFO] [stdout] 8 | use super::*;
[INFO] [stdout]   |     -------- the item `io` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `deserialize` is imported redundantly
[INFO] [stdout]   --> src/config.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | use bincode::{deserialize, serialize};
[INFO] [stdout]    |               ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 | use super::{LogReader, *};
[INFO] [stdout]    |                        - the item `deserialize` is already imported here
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:3:24
[INFO] [stdout]    |
[INFO] [stdout] 3  | #![cfg_attr(test, deny(warnings))]
[INFO] [stdout]    |                        ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `serialize` is imported redundantly
[INFO] [stdout]   --> src/config.rs:13:28
[INFO] [stdout]    |
[INFO] [stdout] 13 | use bincode::{deserialize, serialize};
[INFO] [stdout]    |                            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 | use super::{LogReader, *};
[INFO] [stdout]    |                        - the item `serialize` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `LogReader` is imported redundantly
[INFO] [stdout]   --> src/config.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 | use super::{LogReader, *};
[INFO] [stdout]    |             ^^^^^^^^^  - the item `LogReader` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused imports: `DoublyLinkedList`, `Item`
[INFO] [stdout]  --> src/ds/mod.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use self::dll::{DoublyLinkedList, Item};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `SeqCst` is imported redundantly
[INFO] [stdout]  --> src/iobuf.rs:2:31
[INFO] [stdout]   |
[INFO] [stdout] 2 |     sync::atomic::AtomicBool, sync::atomic::Ordering::SeqCst, sync::Arc,
[INFO] [stdout]   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 9 | use super::*;
[INFO] [stdout]   |     -------- the item `SeqCst` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `LogReader` is imported redundantly
[INFO] [stdout]  --> src/iobuf.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use self::reader::LogReader;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 8 |
[INFO] [stdout] 9 | use super::*;
[INFO] [stdout]   |     -------- the item `LogReader` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `io` is imported redundantly
[INFO] [stdout]  --> src/iterator.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::{collections::BTreeMap, io};
[INFO] [stdout]   |                                  ^^
[INFO] [stdout] ...
[INFO] [stdout] 5 | use super::*;
[INFO] [stdout]   |     -------- the item `io` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `LogReader` is imported redundantly
[INFO] [stdout]  --> src/iterator.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::reader::LogReader;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use super::*;
[INFO] [stdout]   |     -------- the item `LogReader` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unnecessary trailing semicolon
[INFO] [stdout]    --> src/iterator.rs:257:6
[INFO] [stdout]     |
[INFO] [stdout] 257 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(redundant_semicolons)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `Pio` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use super::Pio;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 4 |
[INFO] [stdout] 5 | use super::*;
[INFO] [stdout]   |     -------- the item `Pio` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `PartialEq` is imported redundantly
[INFO] [stdout]  --> src/result.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     cmp::PartialEq,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/30f74ff0dc4d66debc8b50724c446f817e5f75f4/library/std/src/prelude/mod.rs:115:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `PartialEq` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `fmt` is imported redundantly
[INFO] [stdout]  --> src/result.rs:4:11
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fmt::{self, Display},
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 8 | use super::*;
[INFO] [stdout]   |     -------- the item `fmt` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `io` is imported redundantly
[INFO] [stdout]  --> src/result.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     io,
[INFO] [stdout]   |     ^^
[INFO] [stdout] ...
[INFO] [stdout] 8 | use super::*;
[INFO] [stdout]   |     -------- the item `io` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicU64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/iobuf.rs:899:31
[INFO] [stdout]     |
[INFO] [stdout] 899 |         let res = self.header.compare_and_swap(old, new, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicBool::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/lazy.rs:57:28
[INFO] [stdout]    |
[INFO] [stdout] 57 |         while self.init_mu.compare_and_swap(false, true, SeqCst) {}
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicU64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/iobuf.rs:899:31
[INFO] [stdout]     |
[INFO] [stdout] 899 |         let res = self.header.compare_and_swap(old, new, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(deprecated)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicBool::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/lazy.rs:57:28
[INFO] [stdout]    |
[INFO] [stdout] 57 |         while self.init_mu.compare_and_swap(false, true, SeqCst) {}
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/result.rs:127:28
[INFO] [stdout]     |
[INFO] [stdout] 127 |             Io(ref e) => e.description(),
[INFO] [stdout]     |                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/result.rs:127:28
[INFO] [stdout]     |
[INFO] [stdout] 127 |             Io(ref e) => e.description(),
[INFO] [stdout]     |                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicI64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/lib.rs:291:31
[INFO] [stdout]     |
[INFO] [stdout] 291 |         let last = atomic_lsn.compare_and_swap(current, to, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicI64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/lib.rs:291:31
[INFO] [stdout]     |
[INFO] [stdout] 291 |         let last = atomic_lsn.compare_and_swap(current, to, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/config.rs:448:9
[INFO] [stdout]     |
[INFO] [stdout] 448 |         buf.split_off(len - 4);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 448 |         let _ = buf.split_off(len - 4);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/snapshot.rs:218:5
[INFO] [stdout]     |
[INFO] [stdout] 218 |     buf.split_off(len - 12);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 218 |     let _ = buf.split_off(len - 12);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/config.rs:448:9
[INFO] [stdout]     |
[INFO] [stdout] 448 |         buf.split_off(len - 4);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout]     = note: `#[deny(unused_must_use)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 448 |         let _ = buf.split_off(len - 4);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/snapshot.rs:218:5
[INFO] [stdout]     |
[INFO] [stdout] 218 |     buf.split_off(len - 12);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 218 |     let _ = buf.split_off(len - 12);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 19 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pagecache` (lib test) due to 20 previous errors
[INFO] running `Command { std: "docker" "inspect" "59f591c2b19a004c2919c2c1089ee958c31ce9b56a3dd97d5262ac96e0a86271", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59f591c2b19a004c2919c2c1089ee958c31ce9b56a3dd97d5262ac96e0a86271", kill_on_drop: false }`
[INFO] [stdout] 59f591c2b19a004c2919c2c1089ee958c31ce9b56a3dd97d5262ac96e0a86271
