[INFO] cloning repository https://github.com/myself659/avltree [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/myself659/avltree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmyself659%2Favltree", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmyself659%2Favltree'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 2408a6a6eadad2c48086268f33aba7039affcde8 [INFO] checking myself659/avltree against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmyself659%2Favltree" "/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/myself659/avltree on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/myself659/avltree [INFO] finished tweaking git repo https://github.com/myself659/avltree [INFO] tweaked toml for git repo https://github.com/myself659/avltree written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/myself659/avltree 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded quickcheck v0.8.5 [INFO] [stderr] Downloaded quickcheck_macros v0.8.0 [INFO] [stderr] Downloaded env_logger v0.6.2 [INFO] [stderr] Downloaded libc v0.2.61 [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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 1fe28194c8f5d976779189476323ccd65f8a702e7773e7b97a557e67a36cf5c2 [INFO] running `Command { std: "docker" "start" "-a" "1fe28194c8f5d976779189476323ccd65f8a702e7773e7b97a557e67a36cf5c2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1fe28194c8f5d976779189476323ccd65f8a702e7773e7b97a557e67a36cf5c2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1fe28194c8f5d976779189476323ccd65f8a702e7773e7b97a557e67a36cf5c2", kill_on_drop: false }` [INFO] [stdout] 1fe28194c8f5d976779189476323ccd65f8a702e7773e7b97a557e67a36cf5c2 [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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 359a5cbc0ceb2d91bb68bf2801b82094432453b17d9f1a442dcf1bb0d911643e [INFO] running `Command { std: "docker" "start" "-a" "359a5cbc0ceb2d91bb68bf2801b82094432453b17d9f1a442dcf1bb0d911643e", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v0.1.5 [INFO] [stderr] Checking rand_core v0.3.1 [INFO] [stderr] Compiling libc v0.2.61 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Checking lazy_static v1.3.0 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Checking rand_jitter v0.1.4 [INFO] [stderr] Checking itertools v0.8.0 [INFO] [stderr] Checking avltree v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Checking rand_hc v0.1.0 [INFO] [stderr] Checking rand_isaac v0.1.1 [INFO] [stderr] Checking rand_xorshift v0.1.1 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/set.rs:118:17 [INFO] [stdout] | [INFO] [stdout] 118 | replace(&mut target_node.right, right_node.right.take()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 118 | let _ = replace(&mut target_node.right, right_node.right.take()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/set.rs:139:17 [INFO] [stdout] | [INFO] [stdout] 139 | replace(&mut parent_left_node.left, leftmost_node.right.take()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 139 | let _ = replace(&mut parent_left_node.left, leftmost_node.right.take()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking regex v1.2.1 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Checking env_logger v0.6.2 [INFO] [stderr] Checking quickcheck v0.8.5 [INFO] [stderr] Compiling quickcheck_macros v0.8.0 [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/set.rs:118:17 [INFO] [stdout] | [INFO] [stdout] 118 | replace(&mut target_node.right, right_node.right.take()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 118 | let _ = replace(&mut target_node.right, right_node.right.take()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/set.rs:139:17 [INFO] [stdout] | [INFO] [stdout] 139 | replace(&mut parent_left_node.left, leftmost_node.right.take()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 139 | let _ = replace(&mut parent_left_node.left, leftmost_node.right.take()); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.04s [INFO] running `Command { std: "docker" "inspect" "359a5cbc0ceb2d91bb68bf2801b82094432453b17d9f1a442dcf1bb0d911643e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "359a5cbc0ceb2d91bb68bf2801b82094432453b17d9f1a442dcf1bb0d911643e", kill_on_drop: false }` [INFO] [stdout] 359a5cbc0ceb2d91bb68bf2801b82094432453b17d9f1a442dcf1bb0d911643e