[INFO] fetching crate mtrs 0.2.0...
[INFO] checking mtrs-0.2.0 against 52995a223f2919dd3e2e427231db90a257350ded for pr-129249-4
[INFO] extracting crate mtrs 0.2.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate mtrs 0.2.0
[INFO] finished tweaking crates.io crate mtrs 0.2.0
[INFO] tweaked toml for crates.io crate mtrs 0.2.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mtrs 0.2.0 on toolchain 52995a223f2919dd3e2e427231db90a257350ded
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 68 packages to highest compatible versions
[INFO] [stderr]       Adding criterion v0.3.6 (available: v0.8.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 856707a9287f2c87f01caae9d859671e78212ba9d9fb6395093b6117d0c235c2
[INFO] running `Command { std: "docker" "start" "856707a9287f2c87f01caae9d859671e78212ba9d9fb6395093b6117d0c235c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "856707a9287f2c87f01caae9d859671e78212ba9d9fb6395093b6117d0c235c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "856707a9287f2c87f01caae9d859671e78212ba9d9fb6395093b6117d0c235c2" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "856707a9287f2c87f01caae9d859671e78212ba9d9fb6395093b6117d0c235c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "856707a9287f2c87f01caae9d859671e78212ba9d9fb6395093b6117d0c235c2" "/opt/rustwide/cargo-home/bin/cargo" "+52995a223f2919dd3e2e427231db90a257350ded" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.191
[INFO] [stderr]     Checking serde v1.0.229
[INFO] [stderr]     Checking mtrs v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: useless conversion to the same type: `T`
[INFO] [stdout]   --> src/impls/math.rs:62:21
[INFO] [stdout]    |
[INFO] [stdout] 62 | /                     row.iter()
[INFO] [stdout] 63 | |                         .zip(col.iter())
[INFO] [stdout] 64 | |                         .map(|(&left, &right)| left * right)
[INFO] [stdout] 65 | |                         .sum::<T>()
[INFO] [stdout] 66 | |                         .into(),
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method call relies on the `impl<T> Into<T> for T` blanket implementation and type inference, which is a semver hazard as a new `impl Into<_>` that affects your type might be added in the future causing type inference errors
[INFO] [stdout]    = note: `#[deny(self_type_conversion)]` on by default
[INFO] [stdout] help: consider removing the conversion call
[INFO] [stdout]    |
[INFO] [stdout] 65 -                         .sum::<T>()
[INFO] [stdout] 66 -                         .into(),
[INFO] [stdout] 65 +                         .sum::<T>(),
[INFO] [stdout]    |
[INFO] [stdout] help: you can use the fully-qualified path to avoid triggering this lint
[INFO] [stdout]    |
[INFO] [stdout] 62 ~                     <T as Into<_>>::into(row.iter()
[INFO] [stdout] 63 |                         .zip(col.iter())
[INFO] [stdout] 64 |                         .map(|(&left, &right)| left * right)
[INFO] [stdout] 65 ~                         .sum::<T>()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mtrs` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "856707a9287f2c87f01caae9d859671e78212ba9d9fb6395093b6117d0c235c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "856707a9287f2c87f01caae9d859671e78212ba9d9fb6395093b6117d0c235c2", kill_on_drop: false }`
[INFO] [stdout] 856707a9287f2c87f01caae9d859671e78212ba9d9fb6395093b6117d0c235c2
