[INFO] fetching crate cycle 0.4.1...
[INFO] building cycle-0.4.1 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate cycle 0.4.1 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate cycle 0.4.1 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "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-3-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dc5e2586a789b60543899cd64dfb08ca51a847f6d1539e2ac6c3f9c29f0c3418
[INFO] running `Command { std: "docker" "start" "-a" "dc5e2586a789b60543899cd64dfb08ca51a847f6d1539e2ac6c3f9c29f0c3418", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc5e2586a789b60543899cd64dfb08ca51a847f6d1539e2ac6c3f9c29f0c3418", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc5e2586a789b60543899cd64dfb08ca51a847f6d1539e2ac6c3f9c29f0c3418", kill_on_drop: false }`
[INFO] [stdout] dc5e2586a789b60543899cd64dfb08ca51a847f6d1539e2ac6c3f9c29f0c3418
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d712be9a8e33104233614c013c536164d383266d7012826043fb7e8fc4067343
[INFO] running `Command { std: "docker" "start" "-a" "d712be9a8e33104233614c013c536164d383266d7012826043fb7e8fc4067343", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "d712be9a8e33104233614c013c536164d383266d7012826043fb7e8fc4067343", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d712be9a8e33104233614c013c536164d383266d7012826043fb7e8fc4067343", kill_on_drop: false }`
[INFO] [stdout] d712be9a8e33104233614c013c536164d383266d7012826043fb7e8fc4067343
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e69b254d33eea88328c0558237ab6d3a36ef8035418bac86b0a0390c143b4f1
[INFO] running `Command { std: "docker" "start" "-a" "7e69b254d33eea88328c0558237ab6d3a36ef8035418bac86b0a0390c143b4f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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: 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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "7e69b254d33eea88328c0558237ab6d3a36ef8035418bac86b0a0390c143b4f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e69b254d33eea88328c0558237ab6d3a36ef8035418bac86b0a0390c143b4f1", kill_on_drop: false }`
[INFO] [stdout] 7e69b254d33eea88328c0558237ab6d3a36ef8035418bac86b0a0390c143b4f1