[INFO] fetching crate smolscale 0.4.16...
[INFO] checking smolscale-0.4.16 against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] extracting crate smolscale 0.4.16 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate smolscale 0.4.16
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate smolscale 0.4.16
[INFO] tweaked toml for crates.io crate smolscale 0.4.16 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate smolscale 0.4.16 on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate smolscale 0.4.16 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ef011df8774d119835f0225502ce7f4908926e383d9da3d5cfdd3064b060e8d
[INFO] running `Command { std: "docker" "start" "-a" "7ef011df8774d119835f0225502ce7f4908926e383d9da3d5cfdd3064b060e8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ef011df8774d119835f0225502ce7f4908926e383d9da3d5cfdd3064b060e8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ef011df8774d119835f0225502ce7f4908926e383d9da3d5cfdd3064b060e8d", kill_on_drop: false }`
[INFO] [stdout] 7ef011df8774d119835f0225502ce7f4908926e383d9da3d5cfdd3064b060e8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d3bac7ca6d89e705b9ab4ce37a815f870ed1e02f039c02bf1313e0e0a785b0d
[INFO] running `Command { std: "docker" "start" "-a" "4d3bac7ca6d89e705b9ab4ce37a815f870ed1e02f039c02bf1313e0e0a785b0d", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.20
[INFO] [stderr]    Compiling libc v0.2.169
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]     Checking parking v2.1.1
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[INFO] [stderr]     Checking smolscale v0.4.16 (/opt/rustwide/workdir)
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[INFO] [stdout] warning: unused import: `backtrace::Backtrace`
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use backtrace::Backtrace;
[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: `dashmap::DashMap`
[INFO] [stdout]   --> src/lib.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use dashmap::DashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fastcounter::FastCounter`
[INFO] [stdout]   --> src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use fastcounter::FastCounter;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]   --> src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::io::Write;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `AtomicU64`, `Context`, `Instant`, `Poll`, `io::stderr`, and `pin::Pin`
[INFO] [stdout]   --> src/lib.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     io::stderr,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 20 |     pin::Pin,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |         atomic::{AtomicBool, AtomicU64, Ordering},
[INFO] [stdout]    |                              ^^^^^^^^^
[INFO] [stdout] 24 |         Arc,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 25 |     },
[INFO] [stdout] 26 |     task::{Context, Poll},
[INFO] [stdout]    |            ^^^^^^^  ^^^^
[INFO] [stdout] 27 |     time::{Duration, Instant},
[INFO] [stdout]    |                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tabwriter::TabWriter`
[INFO] [stdout]   --> src/lib.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | use tabwriter::TabWriter;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FastCounter` is never constructed
[INFO] [stdout]  --> src/fastcounter.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct FastCounter {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `incr`, `decr`, and `count` are never used
[INFO] [stdout]   --> src/fastcounter.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl FastCounter {
[INFO] [stdout]    | ---------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn incr(&self) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn decr(&self) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `backtrace::Backtrace`
[INFO] [stdout]   --> src/lib.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use backtrace::Backtrace;
[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: `dashmap::DashMap`
[INFO] [stdout]   --> src/lib.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use dashmap::DashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fastcounter::FastCounter`
[INFO] [stdout]   --> src/lib.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use fastcounter::FastCounter;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]   --> src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::io::Write;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `AtomicU64`, `Context`, `Instant`, `Poll`, `io::stderr`, and `pin::Pin`
[INFO] [stdout]   --> src/lib.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     io::stderr,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 20 |     pin::Pin,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |         atomic::{AtomicBool, AtomicU64, Ordering},
[INFO] [stdout]    |                              ^^^^^^^^^
[INFO] [stdout] 24 |         Arc,
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 25 |     },
[INFO] [stdout] 26 |     task::{Context, Poll},
[INFO] [stdout]    |            ^^^^^^^  ^^^^
[INFO] [stdout] 27 |     time::{Duration, Instant},
[INFO] [stdout]    |                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tabwriter::TabWriter`
[INFO] [stdout]   --> src/lib.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 | use tabwriter::TabWriter;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `slow_fibonacci` is never used
[INFO] [stdout]    --> benches/my_benchmark.rs:144:4
[INFO] [stdout]     |
[INFO] [stdout] 144 | fn slow_fibonacci(n: u64) -> u64 {
[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 `FastCounter` is never constructed
[INFO] [stdout]  --> src/fastcounter.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct FastCounter {
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `incr`, `decr`, and `count` are never used
[INFO] [stdout]   --> src/fastcounter.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl FastCounter {
[INFO] [stdout]    | ---------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 12 |     pub fn incr(&self) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     pub fn decr(&self) {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub fn count(&self) -> usize {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 33.96s
[INFO] running `Command { std: "docker" "inspect" "4d3bac7ca6d89e705b9ab4ce37a815f870ed1e02f039c02bf1313e0e0a785b0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d3bac7ca6d89e705b9ab4ce37a815f870ed1e02f039c02bf1313e0e0a785b0d", kill_on_drop: false }`
[INFO] [stdout] 4d3bac7ca6d89e705b9ab4ce37a815f870ed1e02f039c02bf1313e0e0a785b0d
