[INFO] fetching crate fuzzy-tree 0.1.2... [INFO] checking fuzzy-tree-0.1.2 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930 [INFO] extracting crate fuzzy-tree 0.1.2 into /workspace/builds/worker-6-tc2/source [INFO] validating manifest of crates.io crate fuzzy-tree 0.1.2 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate fuzzy-tree 0.1.2 [INFO] finished tweaking crates.io crate fuzzy-tree 0.1.2 [INFO] tweaked toml for crates.io crate fuzzy-tree 0.1.2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml [INFO] crate crates.io crate fuzzy-tree 0.1.2 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] d1dc669ce67eac724876a95d4c9db1c3eca9a616dc4727d7fca22306cccfc3ed [INFO] running `Command { std: "docker" "start" "-a" "d1dc669ce67eac724876a95d4c9db1c3eca9a616dc4727d7fca22306cccfc3ed", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "d1dc669ce67eac724876a95d4c9db1c3eca9a616dc4727d7fca22306cccfc3ed", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d1dc669ce67eac724876a95d4c9db1c3eca9a616dc4727d7fca22306cccfc3ed", kill_on_drop: false }` [INFO] [stdout] d1dc669ce67eac724876a95d4c9db1c3eca9a616dc4727d7fca22306cccfc3ed [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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 -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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 7dc5ec6a40f0f4486ff1028b7d6670d522727fb6bc8696eed38ae5580670a4d8 [INFO] running `Command { std: "docker" "start" "-a" "7dc5ec6a40f0f4486ff1028b7d6670d522727fb6bc8696eed38ae5580670a4d8", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.68 [INFO] [stderr] Compiling cc v1.0.52 [INFO] [stderr] Compiling memchr v2.3.3 [INFO] [stderr] Checking cfg-if v0.1.10 [INFO] [stderr] Checking rustc-demangle v0.1.16 [INFO] [stderr] Compiling log v0.4.8 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Checking thread_local v1.0.1 [INFO] [stderr] Checking unicode-width v0.1.7 [INFO] [stderr] Checking regex-syntax v0.6.17 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking numtoa v0.1.0 [INFO] [stderr] Checking termcolor v1.1.0 [INFO] [stderr] Checking ansi_term v0.11.0 [INFO] [stderr] Checking vec_map v0.8.1 [INFO] [stderr] Checking aho-corasick v0.7.10 [INFO] [stderr] Compiling backtrace-sys v0.1.36 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Checking termion v1.5.5 [INFO] [stderr] Checking clap v2.33.0 [INFO] [stderr] Checking backtrace v0.3.46 [INFO] [stderr] Checking failure v0.1.7 [INFO] [stderr] Checking regex v1.3.6 [INFO] [stderr] Checking which v3.1.1 [INFO] [stderr] Checking env_logger v0.7.1 [INFO] [stderr] Checking fuzzy-tree v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] warning: methods `add_parent` and `n_children` are never used [INFO] [stdout] --> src/path.rs:92:5 [INFO] [stdout] | [INFO] [stdout] 89 | pub trait PathBehaviour { [INFO] [stdout] | ------------- methods in this trait [INFO] [stdout] ... [INFO] [stdout] 92 | fn add_parent(&self, parent: &RcPath); [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 96 | fn n_children(&self) -> usize; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/tree.rs:525:7 [INFO] [stdout] | [INFO] [stdout] 525 | let mut paths = create_test_paths(); [INFO] [stdout] | ----^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `add_parent` and `n_children` are never used [INFO] [stdout] --> src/path.rs:92:5 [INFO] [stdout] | [INFO] [stdout] 89 | pub trait PathBehaviour { [INFO] [stdout] | ------------- methods in this trait [INFO] [stdout] ... [INFO] [stdout] 92 | fn add_parent(&self, parent: &RcPath); [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 96 | fn n_children(&self) -> usize; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/tree.rs:481:3 [INFO] [stdout] | [INFO] [stdout] 481 | &paths[3].add_child(&paths[4]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 481 | let _ = &paths[3].add_child(&paths[4]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/tree.rs:482:3 [INFO] [stdout] | [INFO] [stdout] 482 | &paths[4].add_child(&paths[5]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 482 | let _ = &paths[4].add_child(&paths[5]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/tree.rs:483:3 [INFO] [stdout] | [INFO] [stdout] 483 | &paths[4].add_child(&paths[6]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 483 | let _ = &paths[4].add_child(&paths[6]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/tree.rs:484:3 [INFO] [stdout] | [INFO] [stdout] 484 | &paths[3].add_child(&paths[7]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 484 | let _ = &paths[3].add_child(&paths[7]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/tree.rs:485:3 [INFO] [stdout] | [INFO] [stdout] 485 | &paths[7].add_child(&paths[8]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 485 | let _ = &paths[7].add_child(&paths[8]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/tree.rs:486:3 [INFO] [stdout] | [INFO] [stdout] 486 | &paths[7].add_child(&paths[9]); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 486 | let _ = &paths[7].add_child(&paths[9]); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.07s [INFO] running `Command { std: "docker" "inspect" "7dc5ec6a40f0f4486ff1028b7d6670d522727fb6bc8696eed38ae5580670a4d8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7dc5ec6a40f0f4486ff1028b7d6670d522727fb6bc8696eed38ae5580670a4d8", kill_on_drop: false }` [INFO] [stdout] 7dc5ec6a40f0f4486ff1028b7d6670d522727fb6bc8696eed38ae5580670a4d8