[INFO] fetching crate refchannel 0.0.2...
[INFO] checking refchannel-0.0.2 against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate refchannel 0.0.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate refchannel 0.0.2
[INFO] finished tweaking crates.io crate refchannel 0.0.2
[INFO] tweaked toml for crates.io crate refchannel 0.0.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate refchannel 0.0.2 on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] efe70d2d146d2bd4475fa05c73f8adbb7b98c27a99b79fe29865db891c2a5540
[INFO] running `Command { std: "docker" "start" "-a" "efe70d2d146d2bd4475fa05c73f8adbb7b98c27a99b79fe29865db891c2a5540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "efe70d2d146d2bd4475fa05c73f8adbb7b98c27a99b79fe29865db891c2a5540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efe70d2d146d2bd4475fa05c73f8adbb7b98c27a99b79fe29865db891c2a5540", kill_on_drop: false }`
[INFO] [stdout] efe70d2d146d2bd4475fa05c73f8adbb7b98c27a99b79fe29865db891c2a5540
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa3c3136abe985722c7b15c756d59a3629f79eb82645e3cdc0a868a48810be8c
[INFO] running `Command { std: "docker" "start" "-a" "aa3c3136abe985722c7b15c756d59a3629f79eb82645e3cdc0a868a48810be8c", kill_on_drop: false }`
[INFO] [stderr]     Checking refchannel v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `RefChannel` is never constructed
[INFO] [stdout]   --> src/lib.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct RefChannel<T: ?Sized> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `RefChannel` is never constructed
[INFO] [stdout]   --> src/lib.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct RefChannel<T: ?Sized> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Guard` is never constructed
[INFO] [stdout]   --> src/lib.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Guard<'a, T: ?Sized> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `Guard` is never constructed
[INFO] [stdout]   --> src/lib.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Guard<'a, T: ?Sized> {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `refchannel` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `refchannel` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "aa3c3136abe985722c7b15c756d59a3629f79eb82645e3cdc0a868a48810be8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa3c3136abe985722c7b15c756d59a3629f79eb82645e3cdc0a868a48810be8c", kill_on_drop: false }`
[INFO] [stdout] aa3c3136abe985722c7b15c756d59a3629f79eb82645e3cdc0a868a48810be8c
