[INFO] cloning repository https://github.com/grooviegermanikus/io_uring_monoio
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/grooviegermanikus/io_uring_monoio" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrooviegermanikus%2Fio_uring_monoio", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrooviegermanikus%2Fio_uring_monoio'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c82eaefea284be91e7c83e33d7e6f93a7ff32316
[INFO] checking grooviegermanikus/io_uring_monoio against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrooviegermanikus%2Fio_uring_monoio" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/grooviegermanikus/io_uring_monoio
[INFO] finished tweaking git repo https://github.com/grooviegermanikus/io_uring_monoio
[INFO] tweaked toml for git repo https://github.com/grooviegermanikus/io_uring_monoio written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/grooviegermanikus/io_uring_monoio on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/grooviegermanikus/io_uring_monoio 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded monoio-macros v0.1.0
[INFO] [stderr]   Downloaded io-uring v0.6.4
[INFO] [stderr]   Downloaded syn v2.0.70
[INFO] [stderr]   Downloaded monoio v0.2.3
[INFO] [stderr]   Downloaded auto-const-array v0.2.1
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 88d6c39c5d2649da50ea2b30c167b4d8f10c02b6bd8d6b06d000b4d52058385f
[INFO] running `Command { std: "docker" "start" "-a" "88d6c39c5d2649da50ea2b30c167b4d8f10c02b6bd8d6b06d000b4d52058385f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "88d6c39c5d2649da50ea2b30c167b4d8f10c02b6bd8d6b06d000b4d52058385f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "88d6c39c5d2649da50ea2b30c167b4d8f10c02b6bd8d6b06d000b4d52058385f", kill_on_drop: false }`
[INFO] [stdout] 88d6c39c5d2649da50ea2b30c167b4d8f10c02b6bd8d6b06d000b4d52058385f
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 21a6c20f26efab1d73f42d277942998689e374e6802c94e674ff84152b23bc5d
[INFO] running `Command { std: "docker" "start" "-a" "21a6c20f26efab1d73f42d277942998689e374e6802c94e674ff84152b23bc5d", kill_on_drop: false }`
[INFO] [stderr]     Checking log v0.4.22
[INFO] [stderr]    Compiling syn v2.0.70
[INFO] [stderr]    Compiling io-uring v0.6.4
[INFO] [stderr]     Checking socket2 v0.5.7
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking either v1.13.0
[INFO] [stderr]     Checking nix v0.26.4
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking mio v0.8.11
[INFO] [stderr]     Checking tracing-subscriber v0.3.18
[INFO] [stderr]     Checking itertools v0.13.0
[INFO] [stderr]    Compiling monoio-macros v0.1.0
[INFO] [stderr]    Compiling auto-const-array v0.2.1
[INFO] [stderr]     Checking monoio v0.2.3
[INFO] [stderr]     Checking io_uring_monoio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::env::args`
[INFO] [stdout]  --> src/bin/iocopy.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env::args;
[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 import: `std::future::Future`
[INFO] [stdout]  --> src/bin/iocopy.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::future::Future;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufReader`
[INFO] [stdout]  --> src/bin/iocopy.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{BufReader, BufWriter};
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]  --> src/bin/iocopy.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env::args`
[INFO] [stdout]  --> src/bin/iocopy.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env::args;
[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 import: `std::future::Future`
[INFO] [stdout]  --> src/bin/iocopy.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::future::Future;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `BufReader`
[INFO] [stdout]  --> src/bin/iocopy.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{BufReader, BufWriter};
[INFO] [stdout]   |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]  --> src/bin/iocopy.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::env::args`
[INFO] [stdout]  --> src/bin/allocmem.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env::args;
[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 import: `std::fs::File`
[INFO] [stdout]  --> src/bin/allocmem.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future::Future`
[INFO] [stdout]  --> src/bin/allocmem.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::future::Future;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/bin/allocmem.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader` and `BufWriter`
[INFO] [stdout]  --> src/bin/allocmem.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{BufReader, BufWriter};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `PathBuf` and `Path`
[INFO] [stdout]  --> src/bin/allocmem.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                 ^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Instant`
[INFO] [stdout]  --> src/bin/allocmem.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::time::Instant;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fs` and `io`
[INFO] [stdout]  --> src/bin/allocmem.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::{fs, io};
[INFO] [stdout]   |           ^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]  --> src/bin/allocmem.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::str::FromStr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `alloc`
[INFO] [stdout]   --> src/bin/allocmem.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let alloc = vec![0u8; n_bytes];
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_alloc`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Source` is never constructed
[INFO] [stdout]   --> src/bin/allocmem.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Source {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `monoio::buf::IoVecBuf`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use monoio::buf::IoVecBuf;
[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 import: `std::env::args`
[INFO] [stdout]  --> src/bin/allocmem.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::env::args;
[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 import: `std::fs::File`
[INFO] [stdout]  --> src/bin/allocmem.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future::Future`
[INFO] [stdout]  --> src/bin/allocmem.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::future::Future;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/bin/allocmem.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader` and `BufWriter`
[INFO] [stdout]  --> src/bin/allocmem.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::{BufReader, BufWriter};
[INFO] [stdout]   |               ^^^^^^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `PathBuf` and `Path`
[INFO] [stdout]  --> src/bin/allocmem.rs:6:17
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                 ^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Instant`
[INFO] [stdout]  --> src/bin/allocmem.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::time::Instant;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `fs` and `io`
[INFO] [stdout]  --> src/bin/allocmem.rs:8:11
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::{fs, io};
[INFO] [stdout]   |           ^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::FromStr`
[INFO] [stdout]  --> src/bin/allocmem.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::str::FromStr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LimitReader` is never constructed
[INFO] [stdout]  --> src/limit_reader.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct LimitReader<T: Read> {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/limit_reader.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T: Read> LimitReader<T> {
[INFO] [stdout]    | ---------------------------- associated function in this implementation
[INFO] [stdout] 11 |     pub fn new(reader: T, limit: usize) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `monoio::buf::IoVecBuf`
[INFO] [stdout]  --> src/main.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use monoio::buf::IoVecBuf;
[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 variable: `alloc`
[INFO] [stdout]   --> src/bin/allocmem.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let alloc = vec![0u8; n_bytes];
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_alloc`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Source` is never constructed
[INFO] [stdout]   --> src/bin/allocmem.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Source {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LimitReader` is never constructed
[INFO] [stdout]  --> src/limit_reader.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct LimitReader<T: Read> {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/limit_reader.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T: Read> LimitReader<T> {
[INFO] [stdout]    | ---------------------------- associated function in this implementation
[INFO] [stdout] 11 |     pub fn new(reader: T, limit: usize) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.19s
[INFO] running `Command { std: "docker" "inspect" "21a6c20f26efab1d73f42d277942998689e374e6802c94e674ff84152b23bc5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21a6c20f26efab1d73f42d277942998689e374e6802c94e674ff84152b23bc5d", kill_on_drop: false }`
[INFO] [stdout] 21a6c20f26efab1d73f42d277942998689e374e6802c94e674ff84152b23bc5d