[INFO] fetching crate mini-matrix 0.1.6...
[INFO] checking mini-matrix-0.1.6 against try#de0e80659cee4f27282e60d63bbb8c5271a0d147 for pr-129392
[INFO] extracting crate mini-matrix 0.1.6 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate mini-matrix 0.1.6 on toolchain de0e80659cee4f27282e60d63bbb8c5271a0d147
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mini-matrix 0.1.6
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate mini-matrix 0.1.6
[INFO] tweaked toml for crates.io crate mini-matrix 0.1.6 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate mini-matrix 0.1.6 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" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "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-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d993e5705c9cca78d1572d1eb5d963acc2980c3453df56db53b2d2eea7dd7faa
[INFO] running `Command { std: "docker" "start" "-a" "d993e5705c9cca78d1572d1eb5d963acc2980c3453df56db53b2d2eea7dd7faa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d993e5705c9cca78d1572d1eb5d963acc2980c3453df56db53b2d2eea7dd7faa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d993e5705c9cca78d1572d1eb5d963acc2980c3453df56db53b2d2eea7dd7faa", kill_on_drop: false }`
[INFO] [stdout] d993e5705c9cca78d1572d1eb5d963acc2980c3453df56db53b2d2eea7dd7faa
[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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+de0e80659cee4f27282e60d63bbb8c5271a0d147" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76c638e597a4d15aa9a13fc95d2a86e76bfaf1e12386391229b99ac77c1b7561
[INFO] running `Command { std: "docker" "start" "-a" "76c638e597a4d15aa9a13fc95d2a86e76bfaf1e12386391229b99ac77c1b7561", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking num-integer v0.1.46
[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]     Checking mini-matrix v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `pivot` is never read
[INFO] [stdout]    --> src/matrix.rs:729:25
[INFO] [stdout]     |
[INFO] [stdout] 729 |                         pivot = pivot - 1;
[INFO] [stdout]     |                         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `pivot` is never read
[INFO] [stdout]    --> src/matrix.rs:729:25
[INFO] [stdout]     |
[INFO] [stdout] 729 |                         pivot = pivot - 1;
[INFO] [stdout]     |                         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` 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 3.74s
[INFO] running `Command { std: "docker" "inspect" "76c638e597a4d15aa9a13fc95d2a86e76bfaf1e12386391229b99ac77c1b7561", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76c638e597a4d15aa9a13fc95d2a86e76bfaf1e12386391229b99ac77c1b7561", kill_on_drop: false }`
[INFO] [stdout] 76c638e597a4d15aa9a13fc95d2a86e76bfaf1e12386391229b99ac77c1b7561