[INFO] fetching crate rug 1.28.0...
[INFO] checking rug-1.28.0 against try#18c1d185ac7a6a3bf399296b35e4b2736809a756 for pr-146972
[INFO] extracting crate rug 1.28.0 into /workspace/builds/worker-7-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-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rug 1.28.0 on toolchain 18c1d185ac7a6a3bf399296b35e4b2736809a756
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "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" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b90d42637e5ed7e02f5bbf8ca3198f61c096fcaaaf0a5e5ded0e6d839cda87c1
[INFO] running `Command { std: "docker" "start" "-a" "b90d42637e5ed7e02f5bbf8ca3198f61c096fcaaaf0a5e5ded0e6d839cda87c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b90d42637e5ed7e02f5bbf8ca3198f61c096fcaaaf0a5e5ded0e6d839cda87c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b90d42637e5ed7e02f5bbf8ca3198f61c096fcaaaf0a5e5ded0e6d839cda87c1", kill_on_drop: false }`
[INFO] [stdout] b90d42637e5ed7e02f5bbf8ca3198f61c096fcaaaf0a5e5ded0e6d839cda87c1
[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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+18c1d185ac7a6a3bf399296b35e4b2736809a756" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99fd9351d1eccd53bee4a4c16e9b5035204820ca355e55b2c1facea905105f0b
[INFO] running `Command { std: "docker" "start" "-a" "99fd9351d1eccd53bee4a4c16e9b5035204820ca355e55b2c1facea905105f0b", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.219
[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 serde_json v1.0.143
[INFO] [stderr]    Compiling rug v1.28.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking serde_test v1.0.177
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stdout] warning: value assigned to `new_data` is never read
[INFO] [stdout]    --> src/complex/tests.rs:367:13
[INFO] [stdout]     |
[INFO] [stdout] 367 |             new_data = new_val.inner().d;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4m 34s
[INFO] running `Command { std: "docker" "inspect" "99fd9351d1eccd53bee4a4c16e9b5035204820ca355e55b2c1facea905105f0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99fd9351d1eccd53bee4a4c16e9b5035204820ca355e55b2c1facea905105f0b", kill_on_drop: false }`
[INFO] [stdout] 99fd9351d1eccd53bee4a4c16e9b5035204820ca355e55b2c1facea905105f0b