[INFO] fetching crate polynomial-ring 0.5.0...
[INFO] checking polynomial-ring-0.5.0 against try#d534db0721b23cf977073bf4cd306dbf501e6b4d for pr-138499
[INFO] extracting crate polynomial-ring 0.5.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate polynomial-ring 0.5.0 on toolchain d534db0721b23cf977073bf4cd306dbf501e6b4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d534db0721b23cf977073bf4cd306dbf501e6b4d" "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-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d534db0721b23cf977073bf4cd306dbf501e6b4d" "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 ring-algorithm v0.6.1 (available: v0.8.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d534db0721b23cf977073bf4cd306dbf501e6b4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+d534db0721b23cf977073bf4cd306dbf501e6b4d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f82f66094a7d81c5b0dff13b75e454ae3c607d3e0161a3de4f97013c008bcf60
[INFO] running `Command { std: "docker" "start" "-a" "f82f66094a7d81c5b0dff13b75e454ae3c607d3e0161a3de4f97013c008bcf60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f82f66094a7d81c5b0dff13b75e454ae3c607d3e0161a3de4f97013c008bcf60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f82f66094a7d81c5b0dff13b75e454ae3c607d3e0161a3de4f97013c008bcf60", kill_on_drop: false }`
[INFO] [stdout] f82f66094a7d81c5b0dff13b75e454ae3c607d3e0161a3de4f97013c008bcf60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+d534db0721b23cf977073bf4cd306dbf501e6b4d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 120f4e37953aa6399fdcb4391ee2981e2357ede486a8709a5f71d0e87c94eab2
[INFO] running `Command { std: "docker" "start" "-a" "120f4e37953aa6399fdcb4391ee2981e2357ede486a8709a5f71d0e87c94eab2", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling rustversion v1.0.20
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.6.4
[INFO] [stderr]    Compiling libm v0.2.11
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling rug v1.27.0
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]     Checking num-integer v0.1.46
[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]     Checking num-rational v0.4.2
[INFO] [stderr]     Checking num v0.4.3
[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] 
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "120f4e37953aa6399fdcb4391ee2981e2357ede486a8709a5f71d0e87c94eab2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "120f4e37953aa6399fdcb4391ee2981e2357ede486a8709a5f71d0e87c94eab2", kill_on_drop: false }`
[INFO] [stdout] 120f4e37953aa6399fdcb4391ee2981e2357ede486a8709a5f71d0e87c94eab2