[INFO] fetching crate rug 1.28.0...
[INFO] building rug-1.28.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate rug 1.28.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate rug 1.28.0
[INFO] finished tweaking crates.io crate rug 1.28.0
[INFO] tweaked toml for crates.io crate rug 1.28.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rug 1.28.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rug 1.28.0 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 54cec6bd1f9f99d7581f429f005f49c4f6143843b01439517f85bbe03524754e
[INFO] running `Command { std: "docker" "start" "-a" "54cec6bd1f9f99d7581f429f005f49c4f6143843b01439517f85bbe03524754e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54cec6bd1f9f99d7581f429f005f49c4f6143843b01439517f85bbe03524754e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54cec6bd1f9f99d7581f429f005f49c4f6143843b01439517f85bbe03524754e", kill_on_drop: false }`
[INFO] [stdout] 54cec6bd1f9f99d7581f429f005f49c4f6143843b01439517f85bbe03524754e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8747db67ada82893d8423aca79f3c399a7f208025620a82f083ceba62d81b66f
[INFO] running `Command { std: "docker" "start" "-a" "8747db67ada82893d8423aca79f3c399a7f208025620a82f083ceba62d81b66f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.6.7
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling rug v1.28.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4m 56s
[INFO] running `Command { std: "docker" "inspect" "8747db67ada82893d8423aca79f3c399a7f208025620a82f083ceba62d81b66f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8747db67ada82893d8423aca79f3c399a7f208025620a82f083ceba62d81b66f", kill_on_drop: false }`
[INFO] [stdout] 8747db67ada82893d8423aca79f3c399a7f208025620a82f083ceba62d81b66f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fb0095706627075c6484fc19998d614f9fc292c56b5592ae9fc8a13f1dd0ea1
[INFO] running `Command { std: "docker" "start" "-a" "4fb0095706627075c6484fc19998d614f9fc292c56b5592ae9fc8a13f1dd0ea1", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.143
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling serde_test v1.0.177
[INFO] [stderr]    Compiling rug v1.28.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 12.26s
[INFO] running `Command { std: "docker" "inspect" "4fb0095706627075c6484fc19998d614f9fc292c56b5592ae9fc8a13f1dd0ea1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fb0095706627075c6484fc19998d614f9fc292c56b5592ae9fc8a13f1dd0ea1", kill_on_drop: false }`
[INFO] [stdout] 4fb0095706627075c6484fc19998d614f9fc292c56b5592ae9fc8a13f1dd0ea1