[INFO] fetching crate here_be_dragons 0.3.0...
[INFO] building here_be_dragons-0.3.0 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate here_be_dragons 0.3.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate here_be_dragons 0.3.0 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 here_be_dragons 0.3.0
[INFO] finished tweaking crates.io crate here_be_dragons 0.3.0
[INFO] tweaked toml for crates.io crate here_be_dragons 0.3.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate here_be_dragons 0.3.0 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] 5892f5ccfa43a70aacc2ca5ab7d277ab226dade51b8efd486122479be0cfc6c3
[INFO] running `Command { std: "docker" "start" "-a" "5892f5ccfa43a70aacc2ca5ab7d277ab226dade51b8efd486122479be0cfc6c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5892f5ccfa43a70aacc2ca5ab7d277ab226dade51b8efd486122479be0cfc6c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5892f5ccfa43a70aacc2ca5ab7d277ab226dade51b8efd486122479be0cfc6c3", kill_on_drop: false }`
[INFO] [stdout] 5892f5ccfa43a70aacc2ca5ab7d277ab226dade51b8efd486122479be0cfc6c3
[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] 1decef5c9491fe5d619c4789e517a9b0f5ccbc983930085519ecc9a54b8d25a0
[INFO] running `Command { std: "docker" "start" "-a" "1decef5c9491fe5d619c4789e517a9b0f5ccbc983930085519ecc9a54b8d25a0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling here_be_dragons v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/filter/maze.rs:163:39
[INFO] [stdout]     |
[INFO] [stdout] 163 |                 return Some(neighbors[(self.rng.roll_dice(1, neighbors.len()) - 1)]);
[INFO] [stdout]     |                                       ^                                          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 163 -                 return Some(neighbors[(self.rng.roll_dice(1, neighbors.len()) - 1)]);
[INFO] [stdout] 163 +                 return Some(neighbors[self.rng.roll_dice(1, neighbors.len()) - 1]);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.29s
[INFO] running `Command { std: "docker" "inspect" "1decef5c9491fe5d619c4789e517a9b0f5ccbc983930085519ecc9a54b8d25a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1decef5c9491fe5d619c4789e517a9b0f5ccbc983930085519ecc9a54b8d25a0", kill_on_drop: false }`
[INFO] [stdout] 1decef5c9491fe5d619c4789e517a9b0f5ccbc983930085519ecc9a54b8d25a0
[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] a76a1371ab63b56bcd6edc3bf74913dd6e79d6c8028ac094af1f030bd4d02ff3
[INFO] running `Command { std: "docker" "start" "-a" "a76a1371ab63b56bcd6edc3bf74913dd6e79d6c8028ac094af1f030bd4d02ff3", kill_on_drop: false }`
[INFO] [stderr]    Compiling here_be_dragons v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/filter/maze.rs:163:39
[INFO] [stdout]     |
[INFO] [stdout] 163 |                 return Some(neighbors[(self.rng.roll_dice(1, neighbors.len()) - 1)]);
[INFO] [stdout]     |                                       ^                                          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 163 -                 return Some(neighbors[(self.rng.roll_dice(1, neighbors.len()) - 1)]);
[INFO] [stdout] 163 +                 return Some(neighbors[self.rng.roll_dice(1, neighbors.len()) - 1]);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]    --> src/filter/maze.rs:163:39
[INFO] [stdout]     |
[INFO] [stdout] 163 |                 return Some(neighbors[(self.rng.roll_dice(1, neighbors.len()) - 1)]);
[INFO] [stdout]     |                                       ^                                          ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 163 -                 return Some(neighbors[(self.rng.roll_dice(1, neighbors.len()) - 1)]);
[INFO] [stdout] 163 +                 return Some(neighbors[self.rng.roll_dice(1, neighbors.len()) - 1]);
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "a76a1371ab63b56bcd6edc3bf74913dd6e79d6c8028ac094af1f030bd4d02ff3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a76a1371ab63b56bcd6edc3bf74913dd6e79d6c8028ac094af1f030bd4d02ff3", kill_on_drop: false }`
[INFO] [stdout] a76a1371ab63b56bcd6edc3bf74913dd6e79d6c8028ac094af1f030bd4d02ff3