[INFO] cloning repository https://github.com/Tommy-ASD/future_utils
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Tommy-ASD/future_utils" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTommy-ASD%2Ffuture_utils", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTommy-ASD%2Ffuture_utils'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 679eb1edd62b2cf2f5247a044b0c339ec3ef21e4
[INFO] checking Tommy-ASD/future_utils against try#8a0378607d6b34c242e3bfa75554871be641864b for pr-143028
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTommy-ASD%2Ffuture_utils" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Tommy-ASD/future_utils
[INFO] finished tweaking git repo https://github.com/Tommy-ASD/future_utils
[INFO] tweaked toml for git repo https://github.com/Tommy-ASD/future_utils written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Tommy-ASD/future_utils on toolchain 8a0378607d6b34c242e3bfa75554871be641864b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a0378607d6b34c242e3bfa75554871be641864b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Tommy-ASD/future_utils 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" "+8a0378607d6b34c242e3bfa75554871be641864b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking Tommy-ASD/future_utils against try#8a0378607d6b34c242e3bfa75554871be641864b for pr-143028
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTommy-ASD%2Ffuture_utils" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Tommy-ASD/future_utils
[INFO] finished tweaking git repo https://github.com/Tommy-ASD/future_utils
[INFO] tweaked toml for git repo https://github.com/Tommy-ASD/future_utils written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Tommy-ASD/future_utils on toolchain 8a0378607d6b34c242e3bfa75554871be641864b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8a0378607d6b34c242e3bfa75554871be641864b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Tommy-ASD/future_utils 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" "+8a0378607d6b34c242e3bfa75554871be641864b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8a0378607d6b34c242e3bfa75554871be641864b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 00ec0d42d9e300abad9cc18e5de66544298c71ec63e2c60d341c9a4b8bee5ca3
[INFO] running `Command { std: "docker" "start" "-a" "00ec0d42d9e300abad9cc18e5de66544298c71ec63e2c60d341c9a4b8bee5ca3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00ec0d42d9e300abad9cc18e5de66544298c71ec63e2c60d341c9a4b8bee5ca3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00ec0d42d9e300abad9cc18e5de66544298c71ec63e2c60d341c9a4b8bee5ca3", kill_on_drop: false }`
[INFO] [stdout] 00ec0d42d9e300abad9cc18e5de66544298c71ec63e2c60d341c9a4b8bee5ca3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8a0378607d6b34c242e3bfa75554871be641864b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e35a1d412e6e0cf94472f7aa1014bcb9bfc74411b13cda55eaa8b38425e44ed
[INFO] running `Command { std: "docker" "start" "-a" "3e35a1d412e6e0cf94472f7aa1014bcb9bfc74411b13cda55eaa8b38425e44ed", kill_on_drop: false }`
[INFO] [stderr]     Checking future_utils v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::utils::run_executor`
[INFO] [stdout]  --> src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::utils::run_executor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future::Future`
[INFO] [stdout]  --> src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::future::Future;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::utils::run_executor`
[INFO] [stdout]  --> src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::utils::run_executor;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future::Future`
[INFO] [stdout]  --> src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::future::Future;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ArcWake` is never used
[INFO] [stdout]   --> src/utils.rs:24:18
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub(crate) trait ArcWake: Send + Sync {
[INFO] [stdout]    |                  ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `increase_refcount` is never used
[INFO] [stdout]   --> src/utils.rs:30:22
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub(crate) unsafe fn increase_refcount<T: ArcWake>(data: *const ()) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clone_arc_raw` is never used
[INFO] [stdout]   --> src/utils.rs:34:22
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub(crate) unsafe fn clone_arc_raw<T: ArcWake>(data: *const ()) -> RawWaker {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `wake_arc_raw` is never used
[INFO] [stdout]   --> src/utils.rs:38:22
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub(crate) unsafe fn wake_arc_raw<T: ArcWake>(data: *const ()) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `wake_by_ref_arc_raw` is never used
[INFO] [stdout]   --> src/utils.rs:42:22
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub(crate) unsafe fn wake_by_ref_arc_raw<T: ArcWake>(data: *const ()) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `drop_arc_raw` is never used
[INFO] [stdout]   --> src/utils.rs:46:22
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub(crate) unsafe fn drop_arc_raw<T: ArcWake>(data: *const ()) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `waker_vtable` is never used
[INFO] [stdout]   --> src/utils.rs:49:15
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub(crate) fn waker_vtable<W: ArcWake>() -> &'static RawWakerVTable {
[INFO] [stdout]    |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ThreadNotify` is never constructed
[INFO] [stdout]   --> src/utils.rs:57:19
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub(crate) struct ThreadNotify {
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Enter` is never constructed
[INFO] [stdout]   --> src/utils.rs:76:19
[INFO] [stdout]    |
[INFO] [stdout] 76 | pub(crate) struct Enter {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EnterError` is never constructed
[INFO] [stdout]   --> src/utils.rs:79:19
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub(crate) struct EnterError {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/utils.rs:93:15
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub(crate) fn enter() -> Result<Enter, EnterError> {
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_executor` is never used
[INFO] [stdout]    --> src/utils.rs:104:15
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub(crate) fn run_executor<T, F: FnMut(&mut Context<'_>) -> Poll<T>>(mut f: F) -> T {
[INFO] [stdout]     |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WakerRef` is never constructed
[INFO] [stdout]    --> src/utils.rs:124:19
[INFO] [stdout]     |
[INFO] [stdout] 124 | pub(crate) struct WakerRef<'a> {
[INFO] [stdout]     |                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_unowned` is never used
[INFO] [stdout]    --> src/utils.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 128 | impl<'a> WakerRef<'a> {
[INFO] [stdout]     | --------------------- associated function in this implementation
[INFO] [stdout] 129 |     #[inline]
[INFO] [stdout] 130 |     fn new_unowned(waker: ManuallyDrop<Waker>) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `waker_ref` is never used
[INFO] [stdout]    --> src/utils.rs:145:15
[INFO] [stdout]     |
[INFO] [stdout] 145 | pub(crate) fn waker_ref<W>(wake: &Arc<W>) -> WakerRef<'_>
[INFO] [stdout]     |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `ArcWake` is never used
[INFO] [stdout]   --> src/utils.rs:24:18
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub(crate) trait ArcWake: Send + Sync {
[INFO] [stdout]    |                  ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `increase_refcount` is never used
[INFO] [stdout]   --> src/utils.rs:30:22
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub(crate) unsafe fn increase_refcount<T: ArcWake>(data: *const ()) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clone_arc_raw` is never used
[INFO] [stdout]   --> src/utils.rs:34:22
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub(crate) unsafe fn clone_arc_raw<T: ArcWake>(data: *const ()) -> RawWaker {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `wake_arc_raw` is never used
[INFO] [stdout]   --> src/utils.rs:38:22
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub(crate) unsafe fn wake_arc_raw<T: ArcWake>(data: *const ()) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `wake_by_ref_arc_raw` is never used
[INFO] [stdout]   --> src/utils.rs:42:22
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub(crate) unsafe fn wake_by_ref_arc_raw<T: ArcWake>(data: *const ()) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `drop_arc_raw` is never used
[INFO] [stdout]   --> src/utils.rs:46:22
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub(crate) unsafe fn drop_arc_raw<T: ArcWake>(data: *const ()) {
[INFO] [stdout]    |                      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `waker_vtable` is never used
[INFO] [stdout]   --> src/utils.rs:49:15
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub(crate) fn waker_vtable<W: ArcWake>() -> &'static RawWakerVTable {
[INFO] [stdout]    |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ThreadNotify` is never constructed
[INFO] [stdout]   --> src/utils.rs:57:19
[INFO] [stdout]    |
[INFO] [stdout] 57 | pub(crate) struct ThreadNotify {
[INFO] [stdout]    |                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Enter` is never constructed
[INFO] [stdout]   --> src/utils.rs:76:19
[INFO] [stdout]    |
[INFO] [stdout] 76 | pub(crate) struct Enter {
[INFO] [stdout]    |                   ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EnterError` is never constructed
[INFO] [stdout]   --> src/utils.rs:79:19
[INFO] [stdout]    |
[INFO] [stdout] 79 | pub(crate) struct EnterError {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `enter` is never used
[INFO] [stdout]   --> src/utils.rs:93:15
[INFO] [stdout]    |
[INFO] [stdout] 93 | pub(crate) fn enter() -> Result<Enter, EnterError> {
[INFO] [stdout]    |               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run_executor` is never used
[INFO] [stdout]    --> src/utils.rs:104:15
[INFO] [stdout]     |
[INFO] [stdout] 104 | pub(crate) fn run_executor<T, F: FnMut(&mut Context<'_>) -> Poll<T>>(mut f: F) -> T {
[INFO] [stdout]     |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WakerRef` is never constructed
[INFO] [stdout]    --> src/utils.rs:124:19
[INFO] [stdout]     |
[INFO] [stdout] 124 | pub(crate) struct WakerRef<'a> {
[INFO] [stdout]     |                   ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_unowned` is never used
[INFO] [stdout]    --> src/utils.rs:130:8
[INFO] [stdout]     |
[INFO] [stdout] 128 | impl<'a> WakerRef<'a> {
[INFO] [stdout]     | --------------------- associated function in this implementation
[INFO] [stdout] 129 |     #[inline]
[INFO] [stdout] 130 |     fn new_unowned(waker: ManuallyDrop<Waker>) -> Self {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `waker_ref` is never used
[INFO] [stdout]    --> src/utils.rs:145:15
[INFO] [stdout]     |
[INFO] [stdout] 145 | pub(crate) fn waker_ref<W>(wake: &Arc<W>) -> WakerRef<'_>
[INFO] [stdout]     |               ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "3e35a1d412e6e0cf94472f7aa1014bcb9bfc74411b13cda55eaa8b38425e44ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e35a1d412e6e0cf94472f7aa1014bcb9bfc74411b13cda55eaa8b38425e44ed", kill_on_drop: false }`
[INFO] [stdout] 3e35a1d412e6e0cf94472f7aa1014bcb9bfc74411b13cda55eaa8b38425e44ed