[INFO] fetching crate monte_carlo 0.1.1...
[INFO] checking monte_carlo-0.1.1 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate monte_carlo 0.1.1 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate monte_carlo 0.1.1 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 monte_carlo 0.1.1
[INFO] finished tweaking crates.io crate monte_carlo 0.1.1
[INFO] tweaked toml for crates.io crate monte_carlo 0.1.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding ego-tree v0.6.3 (available: v0.9.0)
[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] c9eea17526137959a6e52504f654cb7d56cced43de1a9b2f82d01b6d02bf52dc
[INFO] running `Command { std: "docker" "start" "-a" "c9eea17526137959a6e52504f654cb7d56cced43de1a9b2f82d01b6d02bf52dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c9eea17526137959a6e52504f654cb7d56cced43de1a9b2f82d01b6d02bf52dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9eea17526137959a6e52504f654cb7d56cced43de1a9b2f82d01b6d02bf52dc", kill_on_drop: false }`
[INFO] [stdout] c9eea17526137959a6e52504f654cb7d56cced43de1a9b2f82d01b6d02bf52dc
[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] 4d39ebbb9d5fedb89719b04dcdd19df60420b04509c83a0b3c7ba13655bcb560
[INFO] running `Command { std: "docker" "start" "-a" "4d39ebbb9d5fedb89719b04dcdd19df60420b04509c83a0b3c7ba13655bcb560", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking ego-tree v0.6.3
[INFO] [stderr]     Checking ordered-float v4.3.0
[INFO] [stderr]     Checking monte_carlo v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/lib.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{borrow::Borrow, f32::consts::SQRT_2, fmt::Debug, ops::ControlFlow};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NodeRef`
[INFO] [stdout]  --> src/lib.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | use ego_tree::{NodeId, NodeRef, Tree};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/lib.rs:2:11
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::{borrow::Borrow, f32::consts::SQRT_2, fmt::Debug, ops::ControlFlow};
[INFO] [stdout]   |           ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `NodeRef`
[INFO] [stdout]  --> src/lib.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | use ego_tree::{NodeId, NodeRef, Tree};
[INFO] [stdout]   |                        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.85s
[INFO] running `Command { std: "docker" "inspect" "4d39ebbb9d5fedb89719b04dcdd19df60420b04509c83a0b3c7ba13655bcb560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d39ebbb9d5fedb89719b04dcdd19df60420b04509c83a0b3c7ba13655bcb560", kill_on_drop: false }`
[INFO] [stdout] 4d39ebbb9d5fedb89719b04dcdd19df60420b04509c83a0b3c7ba13655bcb560