[INFO] fetching crate fibers 0.1.13...
[INFO] checking fibers-0.1.13 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-2
[INFO] extracting crate fibers 0.1.13 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate fibers 0.1.13 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fibers 0.1.13
[INFO] finished tweaking crates.io crate fibers 0.1.13
[INFO] tweaked toml for crates.io crate fibers 0.1.13 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate fibers 0.1.13 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded nbchan v0.1.3
[INFO] [stderr]   Downloaded handy_async v0.2.13
[INFO] [stderr]   Downloaded splay_tree v0.2.10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b65d1bd5b65fd2c68927c5b36a31b5e3bce0950898b668b4599191b45e3130b2
[INFO] running `Command { std: "docker" "start" "-a" "b65d1bd5b65fd2c68927c5b36a31b5e3bce0950898b668b4599191b45e3130b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b65d1bd5b65fd2c68927c5b36a31b5e3bce0950898b668b4599191b45e3130b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b65d1bd5b65fd2c68927c5b36a31b5e3bce0950898b668b4599191b45e3130b2", kill_on_drop: false }`
[INFO] [stdout] b65d1bd5b65fd2c68927c5b36a31b5e3bce0950898b668b4599191b45e3130b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 136ab184b7f96e4e47d995402f2a5ab3cbe2edadf098c1072ba3b512a0acab7b
[INFO] running `Command { std: "docker" "start" "-a" "136ab184b7f96e4e47d995402f2a5ab3cbe2edadf098c1072ba3b512a0acab7b", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking nbchan v0.1.3
[INFO] [stderr]     Checking splay_tree v0.2.10
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking mio v0.6.19
[INFO] [stderr]     Checking handy_async v0.2.13
[INFO] [stderr]     Checking fibers v0.1.13 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `num_cpus` is imported redundantly
[INFO] [stdout]    --> src/executor/thread_pool.rs:6:5
[INFO] [stdout]     |
[INFO] [stdout] 6   | use num_cpus;
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:187:1
[INFO] [stdout]     |
[INFO] [stdout] 187 | extern crate num_cpus;
[INFO] [stdout]     | ---------------------- the item `num_cpus` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]    --> src/fiber/mod.rs:9:15
[INFO] [stdout]     |
[INFO] [stdout] 9   | use futures::{self, Async, Future, IntoFuture, Poll};
[INFO] [stdout]     |               ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:184:1
[INFO] [stdout]     |
[INFO] [stdout] 184 | extern crate futures;
[INFO] [stdout]     | --------------------- the item `futures` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mio` is imported redundantly
[INFO] [stdout]    --> src/io/poll/mod.rs:12:5
[INFO] [stdout]     |
[INFO] [stdout] 12  | use mio;
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | extern crate mio;
[INFO] [stdout]     | ----------------- the item `mio` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]    --> src/io/poll/poller.rs:4:15
[INFO] [stdout]     |
[INFO] [stdout] 4   | use futures::{self, Future};
[INFO] [stdout]     |               ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:184:1
[INFO] [stdout]     |
[INFO] [stdout] 184 | extern crate futures;
[INFO] [stdout]     | --------------------- the item `futures` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mio` is imported redundantly
[INFO] [stdout]    --> src/io/poll/poller.rs:5:5
[INFO] [stdout]     |
[INFO] [stdout] 5   | use mio;
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | extern crate mio;
[INFO] [stdout]     | ----------------- the item `mio` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mio` is imported redundantly
[INFO] [stdout]    --> src/net/mod.rs:21:5
[INFO] [stdout]     |
[INFO] [stdout] 21  | use mio;
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | extern crate mio;
[INFO] [stdout]     | ----------------- the item `mio` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mio` is imported redundantly
[INFO] [stdout]    --> src/net/tcp.rs:5:5
[INFO] [stdout]     |
[INFO] [stdout] 5   | use mio;
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | extern crate mio;
[INFO] [stdout]     | ----------------- the item `mio` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `nbchan` is imported redundantly
[INFO] [stdout]    --> src/sync/oneshot.rs:19:5
[INFO] [stdout]     |
[INFO] [stdout] 19  | use nbchan;
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:186:1
[INFO] [stdout]     |
[INFO] [stdout] 186 | extern crate nbchan;
[INFO] [stdout]     | -------------------- the item `nbchan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `pollers` is never read
[INFO] [stdout]   --> src/executor/thread_pool.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct ThreadPoolExecutor {
[INFO] [stdout]    |            ------------------ field in this struct
[INFO] [stdout] 47 |     pool: SchedulerPool,
[INFO] [stdout] 48 |     pollers: PollerPool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ThreadPoolExecutor` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `links` is never read
[INFO] [stdout]    --> src/executor/thread_pool.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 142 | struct PollerPool {
[INFO] [stdout]     |        ---------- field in this struct
[INFO] [stdout] 143 |     pollers: Vec<poll::PollerHandle>,
[INFO] [stdout] 144 |     links: Vec<Link<(), io::Error>>,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `PollerPool` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `num_cpus` is imported redundantly
[INFO] [stdout]    --> src/executor/thread_pool.rs:6:5
[INFO] [stdout]     |
[INFO] [stdout] 6   | use num_cpus;
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:187:1
[INFO] [stdout]     |
[INFO] [stdout] 187 | extern crate num_cpus;
[INFO] [stdout]     | ---------------------- the item `num_cpus` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]    --> src/fiber/mod.rs:9:15
[INFO] [stdout]     |
[INFO] [stdout] 9   | use futures::{self, Async, Future, IntoFuture, Poll};
[INFO] [stdout]     |               ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:184:1
[INFO] [stdout]     |
[INFO] [stdout] 184 | extern crate futures;
[INFO] [stdout]     | --------------------- the item `futures` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mio` is imported redundantly
[INFO] [stdout]    --> src/io/poll/mod.rs:12:5
[INFO] [stdout]     |
[INFO] [stdout] 12  | use mio;
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | extern crate mio;
[INFO] [stdout]     | ----------------- the item `mio` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]    --> src/io/poll/poller.rs:4:15
[INFO] [stdout]     |
[INFO] [stdout] 4   | use futures::{self, Future};
[INFO] [stdout]     |               ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:184:1
[INFO] [stdout]     |
[INFO] [stdout] 184 | extern crate futures;
[INFO] [stdout]     | --------------------- the item `futures` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mio` is imported redundantly
[INFO] [stdout]    --> src/io/poll/poller.rs:5:5
[INFO] [stdout]     |
[INFO] [stdout] 5   | use mio;
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | extern crate mio;
[INFO] [stdout]     | ----------------- the item `mio` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mio` is imported redundantly
[INFO] [stdout]    --> src/net/mod.rs:21:5
[INFO] [stdout]     |
[INFO] [stdout] 21  | use mio;
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | extern crate mio;
[INFO] [stdout]     | ----------------- the item `mio` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `mio` is imported redundantly
[INFO] [stdout]    --> src/net/tcp.rs:5:5
[INFO] [stdout]     |
[INFO] [stdout] 5   | use mio;
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:185:1
[INFO] [stdout]     |
[INFO] [stdout] 185 | extern crate mio;
[INFO] [stdout]     | ----------------- the item `mio` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `nbchan` is imported redundantly
[INFO] [stdout]    --> src/sync/oneshot.rs:19:5
[INFO] [stdout]     |
[INFO] [stdout] 19  | use nbchan;
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:186:1
[INFO] [stdout]     |
[INFO] [stdout] 186 | extern crate nbchan;
[INFO] [stdout]     | -------------------- the item `nbchan` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]    --> src/time.rs:98:23
[INFO] [stdout]     |
[INFO] [stdout] 98  |         use futures::{self, Async, Future};
[INFO] [stdout]     |                       ^^^^
[INFO] [stdout]     |
[INFO] [stdout]    ::: src/lib.rs:184:1
[INFO] [stdout]     |
[INFO] [stdout] 184 | extern crate futures;
[INFO] [stdout]     | --------------------- the item `futures` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Async` is imported redundantly
[INFO] [stdout]   --> src/time.rs:98:29
[INFO] [stdout]    |
[INFO] [stdout] 97 |         use super::*;
[INFO] [stdout]    |             -------- the item `Async` is already imported here
[INFO] [stdout] 98 |         use futures::{self, Async, Future};
[INFO] [stdout]    |                             ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]   --> src/time.rs:98:36
[INFO] [stdout]    |
[INFO] [stdout] 97 |         use super::*;
[INFO] [stdout]    |             -------- the item `Future` is already imported here
[INFO] [stdout] 98 |         use futures::{self, Async, Future};
[INFO] [stdout]    |                                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `pollers` is never read
[INFO] [stdout]   --> src/executor/thread_pool.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct ThreadPoolExecutor {
[INFO] [stdout]    |            ------------------ field in this struct
[INFO] [stdout] 47 |     pool: SchedulerPool,
[INFO] [stdout] 48 |     pollers: PollerPool,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ThreadPoolExecutor` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `links` is never read
[INFO] [stdout]    --> src/executor/thread_pool.rs:144:5
[INFO] [stdout]     |
[INFO] [stdout] 142 | struct PollerPool {
[INFO] [stdout]     |        ---------- field in this struct
[INFO] [stdout] 143 |     pollers: Vec<poll::PollerHandle>,
[INFO] [stdout] 144 |     links: Vec<Link<(), io::Error>>,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `PollerPool` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.63s
[INFO] running `Command { std: "docker" "inspect" "136ab184b7f96e4e47d995402f2a5ab3cbe2edadf098c1072ba3b512a0acab7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "136ab184b7f96e4e47d995402f2a5ab3cbe2edadf098c1072ba3b512a0acab7b", kill_on_drop: false }`
[INFO] [stdout] 136ab184b7f96e4e47d995402f2a5ab3cbe2edadf098c1072ba3b512a0acab7b