[INFO] fetching crate mio-utun 0.6.19...
[INFO] checking mio-utun-0.6.19 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate mio-utun 0.6.19 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate mio-utun 0.6.19 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mio-utun 0.6.19
[INFO] finished tweaking crates.io crate mio-utun 0.6.19
[INFO] tweaked toml for crates.io crate mio-utun 0.6.19 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bba607e5ddd79daf6a772c5f161e2b2b2de79143f84dc786f279bc6198e60cff
[INFO] running `Command { std: "docker" "start" "-a" "bba607e5ddd79daf6a772c5f161e2b2b2de79143f84dc786f279bc6198e60cff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bba607e5ddd79daf6a772c5f161e2b2b2de79143f84dc786f279bc6198e60cff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bba607e5ddd79daf6a772c5f161e2b2b2de79143f84dc786f279bc6198e60cff", kill_on_drop: false }`
[INFO] [stdout] bba607e5ddd79daf6a772c5f161e2b2b2de79143f84dc786f279bc6198e60cff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bec88763491a76470e3f07af133e852863d2212747b06b3dcb8929efc0a01f8a
[INFO] running `Command { std: "docker" "start" "-a" "bec88763491a76470e3f07af133e852863d2212747b06b3dcb8929efc0a01f8a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking mio-utun v0.6.19 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this attribute can only be applied at the crate level
[INFO] [stdout]  --> src/linux.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![doc(html_root_url = "https://docs.rs/mio-utun/0.6")]
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]   = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]   = note: read https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#at-the-crate-level for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this attribute can only be applied at the crate level
[INFO] [stdout]  --> src/linux.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![doc(html_root_url = "https://docs.rs/mio-utun/0.6")]
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]   = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout]   = note: read https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#at-the-crate-level for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Write`
[INFO] [stdout]  --> tests/echo.rs:4:21
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::{self, Write, Read};
[INFO] [stdout]   |                     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::ErrorKind::WouldBlock`
[INFO] [stdout]  --> tests/echo.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::ErrorKind::WouldBlock;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `t`
[INFO] [stdout]   --> tests/echo.rs:10:14
[INFO] [stdout]    |
[INFO] [stdout] 10 | macro_rules! t {
[INFO] [stdout]    |              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `SERVER`
[INFO] [stdout]   --> tests/echo.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     const SERVER: Token = Token(0);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.75s
[INFO] running `Command { std: "docker" "inspect" "bec88763491a76470e3f07af133e852863d2212747b06b3dcb8929efc0a01f8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bec88763491a76470e3f07af133e852863d2212747b06b3dcb8929efc0a01f8a", kill_on_drop: false }`
[INFO] [stdout] bec88763491a76470e3f07af133e852863d2212747b06b3dcb8929efc0a01f8a