[INFO] fetching crate tract-core 0.20.5...
[INFO] checking tract-core-0.20.5 against master#e4106065bf1bb515935d5d024e8d9c86454e2b22 for pr-112160
[INFO] extracting crate tract-core 0.20.5 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate tract-core 0.20.5 on toolchain e4106065bf1bb515935d5d024e8d9c86454e2b22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tract-core 0.20.5
[INFO] finished tweaking crates.io crate tract-core 0.20.5
[INFO] tweaked toml for crates.io crate tract-core 0.20.5 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded liquid-core v0.26.3
[INFO] [stderr]   Downloaded liquid-lib v0.26.3
[INFO] [stderr]   Downloaded tract-data v0.20.5
[INFO] [stderr]   Downloaded liquid-derive v0.26.3
[INFO] [stderr]   Downloaded scan_fmt v0.2.6
[INFO] [stderr]   Downloaded tract-linalg v0.20.5
[INFO] [stderr]   Downloaded liquid v0.26.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 744c1b1e7c0061d070436fec2dc51e0fa08a044fbe69fb863aa19ff25bd6145b
[INFO] running `Command { std: "docker" "start" "-a" "744c1b1e7c0061d070436fec2dc51e0fa08a044fbe69fb863aa19ff25bd6145b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "744c1b1e7c0061d070436fec2dc51e0fa08a044fbe69fb863aa19ff25bd6145b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "744c1b1e7c0061d070436fec2dc51e0fa08a044fbe69fb863aa19ff25bd6145b", kill_on_drop: false }`
[INFO] [stdout] 744c1b1e7c0061d070436fec2dc51e0fa08a044fbe69fb863aa19ff25bd6145b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 205d403337652d62a19fce341ebfd849b7d1d35b0f9784c21b26c3158a49f606
[INFO] running `Command { std: "docker" "start" "-a" "205d403337652d62a19fce341ebfd849b7d1d35b0f9784c21b26c3158a49f606", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.7
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling time-core v0.1.1
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]     Checking getrandom v0.2.9
[INFO] [stderr]    Compiling anymap2 v0.13.0
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]    Compiling percent-encoding v2.3.0
[INFO] [stderr]    Compiling tinyvec_macros v0.1.1
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling time-macros v0.2.9
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]    Compiling walkdir v2.3.3
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking scan_fmt v0.2.6
[INFO] [stderr]    Compiling rustfft v6.1.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking ciborium-io v0.2.1
[INFO] [stderr]     Checking os_str_bytes v6.5.0
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking strength_reduce v0.2.4
[INFO] [stderr]     Checking ciborium-ll v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]    Compiling derive-new v0.5.9
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking dyn-clone v1.0.11
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking criterion-plot v0.5.0
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking unarray v0.1.4
[INFO] [stderr]     Checking clap v3.2.25
[INFO] [stderr]    Compiling unicode-normalization v0.1.22
[INFO] [stderr]    Compiling time v0.3.21
[INFO] [stderr]     Checking num-complex v0.4.3
[INFO] [stderr]     Checking half v2.2.1
[INFO] [stderr]     Checking plotters v0.3.4
[INFO] [stderr]     Checking approx v0.5.1
[INFO] [stderr]     Checking transpose v0.2.2
[INFO] [stderr]     Checking primal-check v0.3.3
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking tempfile v3.5.0
[INFO] [stderr]     Checking is-terminal v0.4.7
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking proptest v1.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.163
[INFO] [stderr]    Compiling thiserror-impl v1.0.40
[INFO] [stderr]    Compiling liquid-derive v0.26.3
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling pest v2.6.0
[INFO] [stderr]    Compiling pest_meta v2.6.0
[INFO] [stderr]    Compiling pest_generator v2.6.0
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling pest_derive v2.6.0
[INFO] [stderr]     Checking string-interner v0.14.0
[INFO] [stderr]     Checking serde_json v1.0.96
[INFO] [stderr]     Checking ciborium v0.2.1
[INFO] [stderr]     Checking tract-data v0.20.5
[INFO] [stderr]    Compiling kstring v2.0.0
[INFO] [stderr]    Compiling liquid-core v0.26.3
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stderr]    Compiling liquid-lib v0.26.3
[INFO] [stderr]    Compiling liquid v0.26.3
[INFO] [stderr]    Compiling tract-linalg v0.20.5
[INFO] [stderr]     Checking tract-core v0.20.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ops/scan/mir.rs:482:25
[INFO] [stdout]     |
[INFO] [stdout] 482 |                     let mut mapping = &mut new_output_mapping[body_output_id];
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ops/scan/mir.rs:482:25
[INFO] [stdout]     |
[INFO] [stdout] 482 |                     let mut mapping = &mut new_output_mapping[body_output_id];
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.46s
[INFO] running `Command { std: "docker" "inspect" "205d403337652d62a19fce341ebfd849b7d1d35b0f9784c21b26c3158a49f606", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "205d403337652d62a19fce341ebfd849b7d1d35b0f9784c21b26c3158a49f606", kill_on_drop: false }`
[INFO] [stdout] 205d403337652d62a19fce341ebfd849b7d1d35b0f9784c21b26c3158a49f606