[INFO] fetching crate dahl-salso 0.6.6...
[INFO] checking dahl-salso-0.6.6 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate dahl-salso 0.6.6 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate dahl-salso 0.6.6 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate dahl-salso 0.6.6
[INFO] finished tweaking crates.io crate dahl-salso 0.6.6
[INFO] tweaked toml for crates.io crate dahl-salso 0.6.6 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 27 packages
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossbeam v0.8.4
[INFO] [stderr]   Downloaded rand_pcg v0.3.1
[INFO] [stderr]   Downloaded dahl-partition v0.5.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d1b3ebb75f3d698aea938508151e9288d1560364313e4ca99b8290ad087e4060
[INFO] running `Command { std: "docker" "start" "-a" "d1b3ebb75f3d698aea938508151e9288d1560364313e4ca99b8290ad087e4060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d1b3ebb75f3d698aea938508151e9288d1560364313e4ca99b8290ad087e4060", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1b3ebb75f3d698aea938508151e9288d1560364313e4ca99b8290ad087e4060", kill_on_drop: false }`
[INFO] [stdout] d1b3ebb75f3d698aea938508151e9288d1560364313e4ca99b8290ad087e4060
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7928dd976aaf9f0d86224e11914094d5c877da5884794682725708dff0e686ae
[INFO] running `Command { std: "docker" "start" "-a" "7928dd976aaf9f0d86224e11914094d5c877da5884794682725708dff0e686ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling matrixmultiply v0.3.8
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking crossbeam-queue v0.3.11
[INFO] [stderr]     Checking num-complex v0.4.5
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]     Checking rand_pcg v0.3.1
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking dahl-partition v0.5.3
[INFO] [stderr]     Checking crossbeam v0.8.4
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking dahl-salso v0.6.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Clusterings` is imported redundantly
[INFO] [stdout]  --> src/loss.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::clustering::{Clusterings, WorkingClustering};
[INFO] [stdout]   |                         ^^^^^^^^^^^
[INFO] [stdout] 4 | use crate::optimize::CMLossComputer;
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `Clusterings` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Clusterings` is imported redundantly
[INFO] [stdout]  --> src/optimize.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::clustering::{Clusterings, WorkingClustering};
[INFO] [stdout]   |                         ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `Clusterings` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Clusterings` is imported redundantly
[INFO] [stdout]  --> src/loss.rs:3:25
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::clustering::{Clusterings, WorkingClustering};
[INFO] [stdout]   |                         ^^^^^^^^^^^
[INFO] [stdout] 4 | use crate::optimize::CMLossComputer;
[INFO] [stdout] 5 | use crate::*;
[INFO] [stdout]   |     -------- the item `Clusterings` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Clusterings` is imported redundantly
[INFO] [stdout]  --> src/optimize.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::clustering::{Clusterings, WorkingClustering};
[INFO] [stdout]   |                         ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 4 | use crate::*;
[INFO] [stdout]   |     -------- the item `Clusterings` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/optimize.rs:1057:13
[INFO] [stdout]      |
[INFO] [stdout] 1057 |         let mut sc = &mut self.subsets[subset_index as usize];
[INFO] [stdout]      |             ----^^
[INFO] [stdout]      |             |
[INFO] [stdout]      |             help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/optimize.rs:1057:13
[INFO] [stdout]      |
[INFO] [stdout] 1057 |         let mut sc = &mut self.subsets[subset_index as usize];
[INFO] [stdout]      |             ----^^
[INFO] [stdout]      |             |
[INFO] [stdout]      |             help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.85s
[INFO] running `Command { std: "docker" "inspect" "7928dd976aaf9f0d86224e11914094d5c877da5884794682725708dff0e686ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7928dd976aaf9f0d86224e11914094d5c877da5884794682725708dff0e686ae", kill_on_drop: false }`
[INFO] [stdout] 7928dd976aaf9f0d86224e11914094d5c877da5884794682725708dff0e686ae