[INFO] fetching crate polynomial-ring 0.5.0...
[INFO] checking polynomial-ring-0.5.0 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate polynomial-ring 0.5.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate polynomial-ring 0.5.0 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 polynomial-ring 0.5.0
[INFO] finished tweaking crates.io crate polynomial-ring 0.5.0
[INFO] tweaked toml for crates.io crate polynomial-ring 0.5.0 written to /workspace/builds/worker-2-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 35 packages to latest compatible versions
[INFO] [stderr]       Adding auto-impl-ops v0.1.2 (available: v0.2.1)
[INFO] [stderr]       Adding derive-syn-parse v0.1.5 (available: v0.2.0)
[INFO] [stderr]       Adding heck v0.4.1 (available: v0.5.0)
[INFO] [stderr]       Adding ring-algorithm v0.6.1 (available: v0.7.0)
[INFO] [stderr]       Adding strum v0.24.1 (available: v0.26.3)
[INFO] [stderr]       Adding strum_macros v0.24.3 (available: v0.26.4)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.79)
[INFO] [stderr]       Adding windows-sys v0.52.0 (available: v0.59.0)
[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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] dd1feb6e9822b06de370d539bb695ed8aee718a99d1426154988956e1ee1837d
[INFO] running `Command { std: "docker" "start" "-a" "dd1feb6e9822b06de370d539bb695ed8aee718a99d1426154988956e1ee1837d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd1feb6e9822b06de370d539bb695ed8aee718a99d1426154988956e1ee1837d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd1feb6e9822b06de370d539bb695ed8aee718a99d1426154988956e1ee1837d", kill_on_drop: false }`
[INFO] [stdout] dd1feb6e9822b06de370d539bb695ed8aee718a99d1426154988956e1ee1837d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] eb56f3068f83195a0aa217f6ff166987646949052a19892252ca6b3837cde75a
[INFO] running `Command { std: "docker" "start" "-a" "eb56f3068f83195a0aa217f6ff166987646949052a19892252ca6b3837cde75a", kill_on_drop: false }`
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.6.4
[INFO] [stderr]    Compiling libm v0.2.8
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling rug v1.26.1
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]     Checking ring-algorithm v0.6.1
[INFO] [stderr]     Checking num-complex v0.4.6
[INFO] [stderr]     Checking num-bigint v0.4.6
[INFO] [stderr]     Checking num-iter v0.1.45
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]    Compiling derive-syn-parse v0.1.5
[INFO] [stderr]    Compiling strum v0.24.1
[INFO] [stderr]    Compiling auto-impl-ops v0.1.2
[INFO] [stderr]     Checking polynomial-ring v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `SizedExt` is never used
[INFO] [stdout]  --> src/lib.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub trait SizedExt: std::marker::Sized + std::fmt::Debug + std::fmt::Display {}
[INFO] [stdout]   |               ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking num v0.4.3
[INFO] [stdout] warning: trait `SizedExt` is never used
[INFO] [stdout]  --> src/lib.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 |     pub trait SizedExt: std::marker::Sized + std::fmt::Debug + std::fmt::Display {}
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4m 37s
[INFO] running `Command { std: "docker" "inspect" "eb56f3068f83195a0aa217f6ff166987646949052a19892252ca6b3837cde75a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb56f3068f83195a0aa217f6ff166987646949052a19892252ca6b3837cde75a", kill_on_drop: false }`
[INFO] [stdout] eb56f3068f83195a0aa217f6ff166987646949052a19892252ca6b3837cde75a