[INFO] cloning repository https://github.com/rea1bacon/microgradrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rea1bacon/microgradrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frea1bacon%2Fmicrogradrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frea1bacon%2Fmicrogradrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3b6662a3c83d45b9203168a90afdfe4599cf1350
[INFO] building rea1bacon/microgradrust against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frea1bacon%2Fmicrogradrust" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
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[INFO] validating manifest of git repo https://github.com/rea1bacon/microgradrust on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rea1bacon/microgradrust
[INFO] finished tweaking git repo https://github.com/rea1bacon/microgradrust
[INFO] tweaked toml for git repo https://github.com/rea1bacon/microgradrust written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/rea1bacon/microgradrust 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8507e10df63221e4f7eaa2de8b36869db98958e78e857ae73a6e9048311e2444
[INFO] running `Command { std: "docker" "start" "-a" "8507e10df63221e4f7eaa2de8b36869db98958e78e857ae73a6e9048311e2444", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8507e10df63221e4f7eaa2de8b36869db98958e78e857ae73a6e9048311e2444", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8507e10df63221e4f7eaa2de8b36869db98958e78e857ae73a6e9048311e2444", kill_on_drop: false }`
[INFO] [stdout] 8507e10df63221e4f7eaa2de8b36869db98958e78e857ae73a6e9048311e2444
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e90589d4737f784319f7459a0d1370cbf8c2c5ec6a736a91206d4a58f2f060c5
[INFO] running `Command { std: "docker" "start" "-a" "e90589d4737f784319f7459a0d1370cbf8c2c5ec6a736a91206d4a58f2f060c5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling micrograd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Add`, `Div`, `Mul`, `Neg`, and `Sub`
[INFO] [stdout]  --> src/lib.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ops::{Add, Deref, DerefMut, Div, Mul, Neg, Sub},
[INFO] [stdout]   |           ^^^                   ^^^  ^^^  ^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.54s
[INFO] running `Command { std: "docker" "inspect" "e90589d4737f784319f7459a0d1370cbf8c2c5ec6a736a91206d4a58f2f060c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e90589d4737f784319f7459a0d1370cbf8c2c5ec6a736a91206d4a58f2f060c5", kill_on_drop: false }`
[INFO] [stdout] e90589d4737f784319f7459a0d1370cbf8c2c5ec6a736a91206d4a58f2f060c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d5f05df24537e3088388e313d859f1ddd5556d9a4943de9c8ef225e2894068f9
[INFO] running `Command { std: "docker" "start" "-a" "d5f05df24537e3088388e313d859f1ddd5556d9a4943de9c8ef225e2894068f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling micrograd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Add`, `Div`, `Mul`, `Neg`, and `Sub`
[INFO] [stdout]  --> src/lib.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ops::{Add, Deref, DerefMut, Div, Mul, Neg, Sub},
[INFO] [stdout]   |           ^^^                   ^^^  ^^^  ^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Add`, `Div`, `Mul`, `Neg`, and `Sub`
[INFO] [stdout]  --> src/lib.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 |     ops::{Add, Deref, DerefMut, Div, Mul, Neg, Sub},
[INFO] [stdout]   |           ^^^                   ^^^  ^^^  ^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "d5f05df24537e3088388e313d859f1ddd5556d9a4943de9c8ef225e2894068f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5f05df24537e3088388e313d859f1ddd5556d9a4943de9c8ef225e2894068f9", kill_on_drop: false }`
[INFO] [stdout] d5f05df24537e3088388e313d859f1ddd5556d9a4943de9c8ef225e2894068f9