[INFO] fetching crate futures-micro 1.0.0-rc0...
[INFO] checking futures-micro-1.0.0-rc0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate futures-micro 1.0.0-rc0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate futures-micro 1.0.0-rc0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-micro 1.0.0-rc0
[INFO] finished tweaking crates.io crate futures-micro 1.0.0-rc0
[INFO] tweaked toml for crates.io crate futures-micro 1.0.0-rc0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 12 packages
[INFO] [stderr]       Adding fastrand v1.9.0 (latest: v2.0.2)
[INFO] [stderr]       Adding futures-lite v0.1.11 (latest: v2.3.0)
[INFO] [stderr]       Adding pin-project-lite v0.1.12 (latest: v0.2.14)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded futures-lite v0.1.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d25e60559c025a7597bff58a1c9aa403977b8024b317e1edca263082661f777
[INFO] running `Command { std: "docker" "start" "-a" "8d25e60559c025a7597bff58a1c9aa403977b8024b317e1edca263082661f777", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d25e60559c025a7597bff58a1c9aa403977b8024b317e1edca263082661f777", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d25e60559c025a7597bff58a1c9aa403977b8024b317e1edca263082661f777", kill_on_drop: false }`
[INFO] [stdout] 8d25e60559c025a7597bff58a1c9aa403977b8024b317e1edca263082661f777
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e05d4b0d3b8b07d46b08473f556da3c9a9244ebf8dc9015b7248a09167d0453
[INFO] running `Command { std: "docker" "start" "-a" "2e05d4b0d3b8b07d46b08473f556da3c9a9244ebf8dc9015b7248a09167d0453", kill_on_drop: false }`
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking waker-fn v1.1.1
[INFO] [stderr]     Checking futures-micro v1.0.0-rc0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stdout] warning: the item `poll_fn` is imported redundantly
[INFO] [stdout]  --> tests/test.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures_micro::{poll_fn, prelude::*};
[INFO] [stdout]   |                     ^^^^^^^  ---------- the item `poll_fn` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> tests/test.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures_micro::{poll_fn, prelude::*};
[INFO] [stdout]   |                              ---------- the item `Poll` is already imported here
[INFO] [stdout] 6 | use std::task::Poll;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `Command { std: "docker" "inspect" "2e05d4b0d3b8b07d46b08473f556da3c9a9244ebf8dc9015b7248a09167d0453", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e05d4b0d3b8b07d46b08473f556da3c9a9244ebf8dc9015b7248a09167d0453", kill_on_drop: false }`
[INFO] [stdout] 2e05d4b0d3b8b07d46b08473f556da3c9a9244ebf8dc9015b7248a09167d0453
[INFO] checking futures-micro-1.0.0-rc0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate futures-micro 1.0.0-rc0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate futures-micro 1.0.0-rc0 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futures-micro 1.0.0-rc0
[INFO] finished tweaking crates.io crate futures-micro 1.0.0-rc0
[INFO] tweaked toml for crates.io crate futures-micro 1.0.0-rc0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 12 packages
[INFO] [stderr]       Adding fastrand v1.9.0 (latest: v2.0.2)
[INFO] [stderr]       Adding futures-lite v0.1.11 (latest: v2.3.0)
[INFO] [stderr]       Adding pin-project-lite v0.1.12 (latest: v0.2.14)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 215db4ed80b67e2a89fb6740ddfd0c46a106dddddc754ab04cfe841d996fc7e5
[INFO] running `Command { std: "docker" "start" "-a" "215db4ed80b67e2a89fb6740ddfd0c46a106dddddc754ab04cfe841d996fc7e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "215db4ed80b67e2a89fb6740ddfd0c46a106dddddc754ab04cfe841d996fc7e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "215db4ed80b67e2a89fb6740ddfd0c46a106dddddc754ab04cfe841d996fc7e5", kill_on_drop: false }`
[INFO] [stdout] 215db4ed80b67e2a89fb6740ddfd0c46a106dddddc754ab04cfe841d996fc7e5
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 87a96dabb137e7d8186ed5f7f506b07070b4469e898eb29a3ceb171973fac960
[INFO] running `Command { std: "docker" "start" "-a" "87a96dabb137e7d8186ed5f7f506b07070b4469e898eb29a3ceb171973fac960", kill_on_drop: false }`
[INFO] [stderr]     Checking waker-fn v1.1.1
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking futures-micro v1.0.0-rc0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-lite v0.1.11
[INFO] [stdout] warning: the item `poll_fn` is imported redundantly
[INFO] [stdout]  --> tests/test.rs:5:21
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures_micro::{poll_fn, prelude::*};
[INFO] [stdout]   |                     ^^^^^^^  ---------- the item `poll_fn` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Poll` is imported redundantly
[INFO] [stdout]  --> tests/test.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures_micro::{poll_fn, prelude::*};
[INFO] [stdout]   |                              ---------- the item `Poll` is already imported here
[INFO] [stdout] 6 | use std::task::Poll;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "87a96dabb137e7d8186ed5f7f506b07070b4469e898eb29a3ceb171973fac960", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87a96dabb137e7d8186ed5f7f506b07070b4469e898eb29a3ceb171973fac960", kill_on_drop: false }`
[INFO] [stdout] 87a96dabb137e7d8186ed5f7f506b07070b4469e898eb29a3ceb171973fac960