[INFO] cloning repository https://github.com/thoiberg/algo-playground [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thoiberg/algo-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthoiberg%2Falgo-playground", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthoiberg%2Falgo-playground'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] ff370618f21fe4161d1c4d0ff4bcfd04866e6270 [INFO] building thoiberg/algo-playground against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthoiberg%2Falgo-playground" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/thoiberg/algo-playground 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 git repo https://github.com/thoiberg/algo-playground [INFO] finished tweaking git repo https://github.com/thoiberg/algo-playground [INFO] tweaked toml for git repo https://github.com/thoiberg/algo-playground written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/thoiberg/algo-playground 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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 2d144dd5d4006311cea0f6c1e2d9cf3f18a19ee16540cb29da021dcb49cfda0a [INFO] running `Command { std: "docker" "start" "-a" "2d144dd5d4006311cea0f6c1e2d9cf3f18a19ee16540cb29da021dcb49cfda0a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2d144dd5d4006311cea0f6c1e2d9cf3f18a19ee16540cb29da021dcb49cfda0a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2d144dd5d4006311cea0f6c1e2d9cf3f18a19ee16540cb29da021dcb49cfda0a", kill_on_drop: false }` [INFO] [stdout] 2d144dd5d4006311cea0f6c1e2d9cf3f18a19ee16540cb29da021dcb49cfda0a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] b3e596e6160fd7b63be26a0edfdb98471b0024ec194de07bebd37e13c7b44534 [INFO] running `Command { std: "docker" "start" "-a" "b3e596e6160fd7b63be26a0edfdb98471b0024ec194de07bebd37e13c7b44534", kill_on_drop: false }` [INFO] [stderr] Compiling algo_playground v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `fmt::Display` and `ops::Deref` [INFO] [stdout] --> src/main.rs:4:11 [INFO] [stdout] | [INFO] [stdout] 4 | use std::{fmt::Display, ops::Deref}; [INFO] [stdout] | ^^^^^^^^^^^^ ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `child` [INFO] [stdout] --> src/main.rs:92:29 [INFO] [stdout] | [INFO] [stdout] 92 | let child = *left.left.unwrap(); [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_child` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0507]: cannot move out of `left.left` which is behind a mutable reference [INFO] [stdout] --> src/main.rs:92:38 [INFO] [stdout] | [INFO] [stdout] 92 | let child = *left.left.unwrap(); [INFO] [stdout] | ^^^^^^^^^ -------- `left.left` moved due to this method call [INFO] [stdout] | | [INFO] [stdout] | help: consider calling `.as_ref()` or `.as_mut()` to borrow the type's contents [INFO] [stdout] | move occurs because `left.left` has type `Option>>`, which does not implement the `Copy` trait [INFO] [stdout] | [INFO] [stdout] note: `Option::::unwrap` takes ownership of the receiver `self`, which moves `left.left` [INFO] [stdout] --> /rustc/11663cd3bfefef7d34e8f0892c250bf698049392/library/core/src/option.rs:969:25 [INFO] [stdout] help: you could `clone` the value and consume it, if the `Node: Clone` trait bound could be satisfied [INFO] [stdout] | [INFO] [stdout] 92 | let child = *>> as Clone>::clone(&left.left).unwrap(); [INFO] [stdout] | ++++++++++++++++++++++++++++++++++++++++ + [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0507`. [INFO] [stdout] [INFO] [stderr] error: could not compile `algo_playground` (bin "algo_playground") due to 1 previous error; 2 warnings emitted [INFO] running `Command { std: "docker" "inspect" "b3e596e6160fd7b63be26a0edfdb98471b0024ec194de07bebd37e13c7b44534", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b3e596e6160fd7b63be26a0edfdb98471b0024ec194de07bebd37e13c7b44534", kill_on_drop: false }` [INFO] [stdout] b3e596e6160fd7b63be26a0edfdb98471b0024ec194de07bebd37e13c7b44534