[INFO] cloning repository https://github.com/2garryn/newsfeed
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/2garryn/newsfeed" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F2garryn%2Fnewsfeed", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F2garryn%2Fnewsfeed'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c0e98b2ee6a5d8143aa7d10951ed681c23006296
[INFO] checking 2garryn/newsfeed against master#04ff05c9c0cfbca33115c5f1b8bb20a66a54b799 for pr-147834
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F2garryn%2Fnewsfeed" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/2garryn/newsfeed
[INFO] finished tweaking git repo https://github.com/2garryn/newsfeed
[INFO] tweaked toml for git repo https://github.com/2garryn/newsfeed written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/2garryn/newsfeed on toolchain 04ff05c9c0cfbca33115c5f1b8bb20a66a54b799
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[INFO] crate git repo https://github.com/2garryn/newsfeed 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" "+04ff05c9c0cfbca33115c5f1b8bb20a66a54b799" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitflags v1.0.4
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[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+04ff05c9c0cfbca33115c5f1b8bb20a66a54b799" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc4c958871386db345a2c6f001ab4505ea4da53b04876578908c492be14cc4ef
[INFO] running `Command { std: "docker" "start" "-a" "fc4c958871386db345a2c6f001ab4505ea4da53b04876578908c492be14cc4ef", kill_on_drop: false }`
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[INFO] [stdout] fc4c958871386db345a2c6f001ab4505ea4da53b04876578908c492be14cc4ef
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+04ff05c9c0cfbca33115c5f1b8bb20a66a54b799" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e28f06738fde72c726ac44b628356251714f0df1b2b1ff0eb38d745dc22f5aa
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[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling libc v0.2.55
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling serde v1.0.91
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[INFO] [stderr]    Compiling rand_pcg v0.1.2
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[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking rand_xorshift v0.1.1
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[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking newsfeed v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `newsfeed`
[INFO] [stdout]  --> tests/mod.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | extern crate newsfeed;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stdout] error[E0583]: file not found for module `wal`
[INFO] [stdout]   --> src/chunked_store/mod.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | mod wal;
[INFO] [stdout]    | ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: to create the module `wal`, create file "src/chunked_store/wal.rs" or "src/chunked_store/wal/mod.rs"
[INFO] [stdout]    = note: if there is a `mod wal` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0252]: the name `Result` is defined multiple times
[INFO] [stdout]  --> src/follow/mod.rs:1:47
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{ErrorKind, Result, Write, Read, Result};
[INFO] [stdout]   |                          ------               ^^^^^^ `Result` reimported here
[INFO] [stdout]   |                          |
[INFO] [stdout]   |                          previous import of the type `Result` here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Result` must be defined only once in the type namespace of this module
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FeedId`
[INFO] [stdout]  --> src/store/mod.rs:3:45
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::activity::{Activity, ActivityId, FeedId, Filter};
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `Metadata`, and `OpenOptions`
[INFO] [stdout]  --> src/chunked_store/mod.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::{File, OpenOptions, Metadata};
[INFO] [stdout]   |               ^^^^  ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ErrorKind`, `SeekFrom`, and `Seek`
[INFO] [stdout]  --> src/chunked_store/mod.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{Result, Seek, ErrorKind, SeekFrom};
[INFO] [stdout]   |                       ^^^^  ^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Drop`
[INFO] [stdout]  --> src/chunked_store/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::ops::Drop;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ActivityList`, `PaginationRequest`, `RelativeRequest`, and `StoreCall`
[INFO] [stdout]  --> src/chunked_store/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     RelativeRequest, 
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 7 |     PaginationRequest,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 8 |     ActivityList,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 9 |     StoreCall
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ActivityId`
[INFO] [stdout]   --> src/chunked_store/mod.rs:11:41
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::activity::{FeedId, Activity, ActivityId};
[INFO] [stdout]    |                                         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ActivityId` and `Activity`
[INFO] [stdout]  --> src/chunked_store/page_index.rs:2:31
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::activity::{FeedId, Activity, ActivityId};
[INFO] [stdout]   |                               ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/chunked_store/page_index.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/chunked_store/page_index.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{Read, Result};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ActivityId` and `Activity`
[INFO] [stdout]  --> src/chunked_store/pages.rs:2:31
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::activity::{FeedId, Activity, ActivityId};
[INFO] [stdout]   |                               ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/chunked_store/pages.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ErrorKind`, `Result`, and `Write`
[INFO] [stdout]  --> src/follow/mod.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{ErrorKind, Result, Write, Read, Result};
[INFO] [stdout]   |               ^^^^^^^^^          ^^^^^        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/follow/mod.rs:7:36
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn read_from_file(reader: &Read) -> Result<Followers> {
[INFO] [stdout]   |                                    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn read_from_file(reader: &dyn Read) -> Result<Followers> {
[INFO] [stdout]   |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `feed_id`
[INFO] [stdout]   --> src/chunked_store/page_index.rs:10:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(feed_id: FeedId, storage_path: &Path) -> Result<PageIndex> {
[INFO] [stdout]    |                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_feed_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `storage_path`
[INFO] [stdout]   --> src/chunked_store/page_index.rs:10:33
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(feed_id: FeedId, storage_path: &Path) -> Result<PageIndex> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_storage_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `feed_id`
[INFO] [stdout]   --> src/chunked_store/pages.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(feed_id: FeedId, storage_path: &Path) -> Result<Pages> {
[INFO] [stdout]    |                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_feed_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `storage_path`
[INFO] [stdout]   --> src/chunked_store/pages.rs:11:33
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(feed_id: FeedId, storage_path: &Path) -> Result<Pages> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_storage_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]  --> src/follow/mod.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn read_from_file(reader: &Read) -> Result<Followers> {
[INFO] [stdout]   |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0252, E0583.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0252`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `newsfeed` (bin "newsfeed" test) due to 2 previous errors; 18 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `newsfeed` (test "mod") due to 1 previous error
[INFO] [stdout] error[E0583]: file not found for module `wal`
[INFO] [stdout]   --> src/chunked_store/mod.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | mod wal;
[INFO] [stdout]    | ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: to create the module `wal`, create file "src/chunked_store/wal.rs" or "src/chunked_store/wal/mod.rs"
[INFO] [stdout]    = note: if there is a `mod wal` elsewhere in the crate already, import it with `use crate::...` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0252]: the name `Result` is defined multiple times
[INFO] [stdout]  --> src/follow/mod.rs:1:47
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{ErrorKind, Result, Write, Read, Result};
[INFO] [stdout]   |                          ------               ^^^^^^ `Result` reimported here
[INFO] [stdout]   |                          |
[INFO] [stdout]   |                          previous import of the type `Result` here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Result` must be defined only once in the type namespace of this module
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FeedId`
[INFO] [stdout]  --> src/store/mod.rs:3:45
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::activity::{Activity, ActivityId, FeedId, Filter};
[INFO] [stdout]   |                                             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `File`, `Metadata`, and `OpenOptions`
[INFO] [stdout]  --> src/chunked_store/mod.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::{File, OpenOptions, Metadata};
[INFO] [stdout]   |               ^^^^  ^^^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ErrorKind`, `SeekFrom`, and `Seek`
[INFO] [stdout]  --> src/chunked_store/mod.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{Result, Seek, ErrorKind, SeekFrom};
[INFO] [stdout]   |                       ^^^^  ^^^^^^^^^  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Drop`
[INFO] [stdout]  --> src/chunked_store/mod.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::ops::Drop;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ActivityList`, `PaginationRequest`, `RelativeRequest`, and `StoreCall`
[INFO] [stdout]  --> src/chunked_store/mod.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     RelativeRequest, 
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 7 |     PaginationRequest,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 8 |     ActivityList,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 9 |     StoreCall
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ActivityId`
[INFO] [stdout]   --> src/chunked_store/mod.rs:11:41
[INFO] [stdout]    |
[INFO] [stdout] 11 | use crate::activity::{FeedId, Activity, ActivityId};
[INFO] [stdout]    |                                         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ActivityId` and `Activity`
[INFO] [stdout]  --> src/chunked_store/page_index.rs:2:31
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::activity::{FeedId, Activity, ActivityId};
[INFO] [stdout]   |                               ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/chunked_store/page_index.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Read`
[INFO] [stdout]  --> src/chunked_store/page_index.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{Read, Result};
[INFO] [stdout]   |               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ActivityId` and `Activity`
[INFO] [stdout]  --> src/chunked_store/pages.rs:2:31
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::activity::{FeedId, Activity, ActivityId};
[INFO] [stdout]   |                               ^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PathBuf`
[INFO] [stdout]  --> src/chunked_store/pages.rs:3:23
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `ErrorKind`, `Result`, and `Write`
[INFO] [stdout]  --> src/follow/mod.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::io::{ErrorKind, Result, Write, Read, Result};
[INFO] [stdout]   |               ^^^^^^^^^          ^^^^^        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/follow/mod.rs:7:36
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn read_from_file(reader: &Read) -> Result<Followers> {
[INFO] [stdout]   |                                    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]   = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn read_from_file(reader: &dyn Read) -> Result<Followers> {
[INFO] [stdout]   |                                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `feed_id`
[INFO] [stdout]   --> src/chunked_store/page_index.rs:10:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(feed_id: FeedId, storage_path: &Path) -> Result<PageIndex> {
[INFO] [stdout]    |                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_feed_id`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `storage_path`
[INFO] [stdout]   --> src/chunked_store/page_index.rs:10:33
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub fn new(feed_id: FeedId, storage_path: &Path) -> Result<PageIndex> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_storage_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `feed_id`
[INFO] [stdout]   --> src/chunked_store/pages.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(feed_id: FeedId, storage_path: &Path) -> Result<Pages> {
[INFO] [stdout]    |                ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_feed_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `storage_path`
[INFO] [stdout]   --> src/chunked_store/pages.rs:11:33
[INFO] [stdout]    |
[INFO] [stdout] 11 |     pub fn new(feed_id: FeedId, storage_path: &Path) -> Result<Pages> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_storage_path`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reader`
[INFO] [stdout]  --> src/follow/mod.rs:7:27
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pub fn read_from_file(reader: &Read) -> Result<Followers> {
[INFO] [stdout]   |                           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_reader`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `newsfeed` (bin "newsfeed") due to 2 previous errors; 18 warnings emitted
[INFO] [stdout] Some errors have detailed explanations: E0252, E0583.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0252`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6e28f06738fde72c726ac44b628356251714f0df1b2b1ff0eb38d745dc22f5aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e28f06738fde72c726ac44b628356251714f0df1b2b1ff0eb38d745dc22f5aa", kill_on_drop: false }`
[INFO] [stdout] 6e28f06738fde72c726ac44b628356251714f0df1b2b1ff0eb38d745dc22f5aa
