[INFO] fetching crate cycle 0.4.1...
[INFO] checking cycle-0.4.1 against master#f167efad2f51088d86180ee89177b3d7c9e7c2f5 for pr-129543
[INFO] extracting crate cycle 0.4.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate cycle 0.4.1 on toolchain f167efad2f51088d86180ee89177b3d7c9e7c2f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cycle 0.4.1
[INFO] finished tweaking crates.io crate cycle 0.4.1
[INFO] tweaked toml for crates.io crate cycle 0.4.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate cycle 0.4.1 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" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df984df4ff52d3c16a02f9331d8d7dcf08332404cd8b593b77947a6244cb2a3e
[INFO] running `Command { std: "docker" "start" "-a" "df984df4ff52d3c16a02f9331d8d7dcf08332404cd8b593b77947a6244cb2a3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df984df4ff52d3c16a02f9331d8d7dcf08332404cd8b593b77947a6244cb2a3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df984df4ff52d3c16a02f9331d8d7dcf08332404cd8b593b77947a6244cb2a3e", kill_on_drop: false }`
[INFO] [stdout] df984df4ff52d3c16a02f9331d8d7dcf08332404cd8b593b77947a6244cb2a3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f167efad2f51088d86180ee89177b3d7c9e7c2f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70bedd2c096511d5d9f70ae2b7066abe697f390cd0e7553dcfbccde3cce4cb34
[INFO] running `Command { std: "docker" "start" "-a" "70bedd2c096511d5d9f70ae2b7066abe697f390cd0e7553dcfbccde3cce4cb34", kill_on_drop: false }`
[INFO] [stderr]     Checking cycle v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/base/mod.rs:882:17
[INFO] [stdout]     |
[INFO] [stdout] 882 |       match self.borrow() {
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Tree` does not implement `Borrow`, so calling `borrow` on `&Tree` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 882 -       match self.borrow() {
[INFO] [stdout] 882 +       match self {
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Tree`, implement `Clone` for it
[INFO] [stdout]     |
[INFO] [stdout] 60  + #[derive(Clone)]
[INFO] [stdout] 61  | pub enum Tree {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/base/mod.rs:882:17
[INFO] [stdout]     |
[INFO] [stdout] 882 |       match self.borrow() {
[INFO] [stdout]     |                 ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Tree` does not implement `Borrow`, so calling `borrow` on `&Tree` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 882 -       match self.borrow() {
[INFO] [stdout] 882 +       match self {
[INFO] [stdout]     |
[INFO] [stdout] help: if you meant to clone `Tree`, implement `Clone` for it
[INFO] [stdout]     |
[INFO] [stdout] 60  + #[derive(Clone)]
[INFO] [stdout] 61  | pub enum Tree {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `Command { std: "docker" "inspect" "70bedd2c096511d5d9f70ae2b7066abe697f390cd0e7553dcfbccde3cce4cb34", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70bedd2c096511d5d9f70ae2b7066abe697f390cd0e7553dcfbccde3cce4cb34", kill_on_drop: false }`
[INFO] [stdout] 70bedd2c096511d5d9f70ae2b7066abe697f390cd0e7553dcfbccde3cce4cb34