[INFO] fetching crate quickring 0.1.0...
[INFO] testing quickring-0.1.0 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-2
[INFO] extracting crate quickring 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate quickring 0.1.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate quickring 0.1.0
[INFO] tweaked toml for crates.io crate quickring 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate quickring 0.1.0 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate quickring 0.1.0 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ringbuf v0.4.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 093a9a4e0728473f3f4e31095b2a4c97314b9217b2b45dedb732a8d333b5c75d
[INFO] running `Command { std: "docker" "start" "-a" "093a9a4e0728473f3f4e31095b2a4c97314b9217b2b45dedb732a8d333b5c75d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "093a9a4e0728473f3f4e31095b2a4c97314b9217b2b45dedb732a8d333b5c75d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "093a9a4e0728473f3f4e31095b2a4c97314b9217b2b45dedb732a8d333b5c75d", kill_on_drop: false }`
[INFO] [stdout] 093a9a4e0728473f3f4e31095b2a4c97314b9217b2b45dedb732a8d333b5c75d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f7fd5edcd9c17edd69ce54bb48edc1b576def73f6052408a462941d0504af1a
[INFO] running `Command { std: "docker" "start" "-a" "7f7fd5edcd9c17edd69ce54bb48edc1b576def73f6052408a462941d0504af1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling quickring v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "7f7fd5edcd9c17edd69ce54bb48edc1b576def73f6052408a462941d0504af1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f7fd5edcd9c17edd69ce54bb48edc1b576def73f6052408a462941d0504af1a", kill_on_drop: false }`
[INFO] [stdout] 7f7fd5edcd9c17edd69ce54bb48edc1b576def73f6052408a462941d0504af1a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e221f7bc620de5bdc165458e2d362f56e738a2d045717c5d65d76b7566cefee
[INFO] running `Command { std: "docker" "start" "-a" "5e221f7bc620de5bdc165458e2d362f56e738a2d045717c5d65d76b7566cefee", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.180
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling ringbuf v0.4.8
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling rand_core v0.9.5
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling quickring v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/comparison.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let mut sum = 0_usize;
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]   --> examples/comparison.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let mut sum = 0_usize;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `bench_ringbuf` is never used
[INFO] [stdout]   --> examples/comparison.rs:97:4
[INFO] [stdout]    |
[INFO] [stdout] 97 | fn bench_ringbuf<const CAP: usize>() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> examples/udp.rs:95:9
[INFO] [stdout]    |
[INFO] [stdout] 86 | /         loop {
[INFO] [stdout] 87 | |             if let Some(packet) = cons.pop() {
[INFO] [stdout] 88 | |                 let text = String::from_utf8_lossy(&packet);
[INFO] [stdout] 89 | |                 print!("Client got: {}", text);
[INFO] [stdout] ...  |
[INFO] [stdout] 93 | |         }
[INFO] [stdout]    | |_________- any code following this expression is unreachable
[INFO] [stdout] 94 |
[INFO] [stdout] 95 |           let _ = recv_thread.join();
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `std` in this scope
[INFO] [stdout]    --> src/lib.rs:313:9
[INFO] [stdout]     |
[INFO] [stdout] 313 |     use std::time::Instant;
[INFO] [stdout]     |         ^^^ use of unresolved module or unlinked crate `std`
[INFO] [stdout]     |
[INFO] [stdout]     = help: if you wanted to use a crate named `std`, use `cargo add std` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `std` in this scope
[INFO] [stdout]    --> src/lib.rs:500:13
[INFO] [stdout]     |
[INFO] [stdout] 500 |         use std::fmt::Display;
[INFO] [stdout]     |             ^^^ use of unresolved module or unlinked crate `std`
[INFO] [stdout]     |
[INFO] [stdout]     = help: if you wanted to use a crate named `std`, use `cargo add std` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std`
[INFO] [stdout]    --> src/lib.rs:312:9
[INFO] [stdout]     |
[INFO] [stdout] 312 |     use std::thread;
[INFO] [stdout]     |         ^^^ use of unresolved module or unlinked crate `std`
[INFO] [stdout]     |
[INFO] [stdout]     = help: if you wanted to use a crate named `std`, use `cargo add std` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `recv_thread`
[INFO] [stdout]   --> examples/udp.rs:66:13
[INFO] [stdout]    |
[INFO] [stdout] 66 |         let recv_thread = thread::spawn(move || {
[INFO] [stdout]    |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_recv_thread`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:465:9
[INFO] [stdout]     |
[INFO] [stdout] 465 |         println!();
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:466:9
[INFO] [stdout]     |
[INFO] [stdout] 466 |         println!("================= SPSC BENCH =================");
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:467:9
[INFO] [stdout]     |
[INFO] [stdout] 467 |         println!("iters: {ITERS}");
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:468:9
[INFO] [stdout]     |
[INFO] [stdout] 468 |         println!("capacity: {CAP}");
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:469:9
[INFO] [stdout]     |
[INFO] [stdout] 469 |         println!("---------------------------------------------");
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:470:9
[INFO] [stdout]     |
[INFO] [stdout] 470 |         println!("Your RingBuffer : {:?}", ours);
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:471:9
[INFO] [stdout]     |
[INFO] [stdout] 471 |         println!("ringbuf HeapRb  : {:?}", ringbuf);
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:474:9
[INFO] [stdout]     |
[INFO] [stdout] 474 |         println!("Speed ratio (ringbuf / yours): {:.2}x", ratio);
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:475:9
[INFO] [stdout]     |
[INFO] [stdout] 475 |         println!("=============================================");
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:554:9
[INFO] [stdout]     |
[INFO] [stdout] 554 |         println!("Time for {OPERATIONS} writes: {:?}", start.elapsed());
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find macro `println` in this scope
[INFO] [stdout]    --> src/lib.rs:569:9
[INFO] [stdout]     |
[INFO] [stdout] 569 |         println!("Time for {OPERATIONS} reads: {:?}", start.elapsed());
[INFO] [stdout]     |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `fmt` in this scope
[INFO] [stdout]    --> src/lib.rs:508:35
[INFO] [stdout]     |
[INFO] [stdout] 508 |             fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
[INFO] [stdout]     |                                   ^^^ use of unresolved module or unlinked crate `fmt`
[INFO] [stdout]     |
[INFO] [stdout]     = help: if you wanted to use a crate named `fmt`, use `cargo add fmt` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing one of these modules
[INFO] [stdout]     |
[INFO] [stdout] 309 +     use crate::tests::alloc::fmt;
[INFO] [stdout]     |
[INFO] [stdout] 309 +     use core::fmt;
[INFO] [stdout]     |
[INFO] [stdout] 309 +     use alloc::fmt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: cannot find module or crate `fmt` in this scope
[INFO] [stdout]    --> src/lib.rs:508:58
[INFO] [stdout]     |
[INFO] [stdout] 508 |             fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
[INFO] [stdout]     |                                                          ^^^ use of unresolved module or unlinked crate `fmt`
[INFO] [stdout]     |
[INFO] [stdout]     = help: if you wanted to use a crate named `fmt`, use `cargo add fmt` to add it to your `Cargo.toml`
[INFO] [stdout] help: consider importing one of these modules
[INFO] [stdout]     |
[INFO] [stdout] 309 +     use crate::tests::alloc::fmt;
[INFO] [stdout]     |
[INFO] [stdout] 309 +     use core::fmt;
[INFO] [stdout]     |
[INFO] [stdout] 309 +     use alloc::fmt;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `quickring` (lib test) due to 16 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5e221f7bc620de5bdc165458e2d362f56e738a2d045717c5d65d76b7566cefee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e221f7bc620de5bdc165458e2d362f56e738a2d045717c5d65d76b7566cefee", kill_on_drop: false }`
[INFO] [stdout] 5e221f7bc620de5bdc165458e2d362f56e738a2d045717c5d65d76b7566cefee