[INFO] cloning repository https://github.com/arunman1kandan/cobalt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arunman1kandan/cobalt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farunman1kandan%2Fcobalt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farunman1kandan%2Fcobalt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e27e5cf2f547bf6c15d9d6abe7d8d95a54a7c9aa
[INFO] checking arunman1kandan/cobalt against try#1779a8680dcd39c56ed600627cf6742ef07ed78c for pr-149045
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farunman1kandan%2Fcobalt" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/arunman1kandan/cobalt
[INFO] finished tweaking git repo https://github.com/arunman1kandan/cobalt
[INFO] tweaked toml for git repo https://github.com/arunman1kandan/cobalt written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/arunman1kandan/cobalt on toolchain 1779a8680dcd39c56ed600627cf6742ef07ed78c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/arunman1kandan/cobalt 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" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking arunman1kandan/cobalt against try#1779a8680dcd39c56ed600627cf6742ef07ed78c for pr-149045
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farunman1kandan%2Fcobalt" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/arunman1kandan/cobalt
[INFO] finished tweaking git repo https://github.com/arunman1kandan/cobalt
[INFO] tweaked toml for git repo https://github.com/arunman1kandan/cobalt written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/arunman1kandan/cobalt on toolchain 1779a8680dcd39c56ed600627cf6742ef07ed78c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/arunman1kandan/cobalt 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" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking arunman1kandan/cobalt against try#1779a8680dcd39c56ed600627cf6742ef07ed78c for pr-149045
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farunman1kandan%2Fcobalt" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/arunman1kandan/cobalt
[INFO] finished tweaking git repo https://github.com/arunman1kandan/cobalt
[INFO] tweaked toml for git repo https://github.com/arunman1kandan/cobalt written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/arunman1kandan/cobalt on toolchain 1779a8680dcd39c56ed600627cf6742ef07ed78c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/arunman1kandan/cobalt 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" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb039095c4a8894abbea67b12b7ae17bd06dc01ca890436f29d18998b4e2820d
[INFO] running `Command { std: "docker" "start" "-a" "eb039095c4a8894abbea67b12b7ae17bd06dc01ca890436f29d18998b4e2820d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb039095c4a8894abbea67b12b7ae17bd06dc01ca890436f29d18998b4e2820d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb039095c4a8894abbea67b12b7ae17bd06dc01ca890436f29d18998b4e2820d", kill_on_drop: false }`
[INFO] [stdout] eb039095c4a8894abbea67b12b7ae17bd06dc01ca890436f29d18998b4e2820d
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1779a8680dcd39c56ed600627cf6742ef07ed78c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e4a8040415700d0b9b2dcc76169e01e7fa1207a20e7cc942566bfb8960cd3d4
[INFO] running `Command { std: "docker" "start" "-a" "6e4a8040415700d0b9b2dcc76169e01e7fa1207a20e7cc942566bfb8960cd3d4", kill_on_drop: false }`
[INFO] [stderr]     Checking cobalt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated items `from_vec` and `reshape` are never used
[INFO] [stdout]   --> src/tensor.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Tensor {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn from_vec(v: Vec<f32>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn reshape(&mut self, new_shape: Vec<usize>) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add`, `mul`, and `matmul` are never used
[INFO] [stdout]    --> src/tensor.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl Tensor {
[INFO] [stdout]     | ----------- methods in this implementation
[INFO] [stdout] 100 |     /// Elementwise add (Tensor + Tensor)
[INFO] [stdout] 101 |     pub fn add(&self, other: &Tensor) -> Tensor {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     pub fn mul(&self, other: &Tensor) -> Tensor {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     pub fn matmul(&self, other: &Tensor) -> Tensor {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]   --> src/ops/elementwise.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn add(a: &Tensor, b: &Tensor) -> Tensor {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mul` is never used
[INFO] [stdout]   --> src/ops/elementwise.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn mul(a: &Tensor, b: &Tensor) -> Tensor {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matmul` is never used
[INFO] [stdout]   --> src/ops/matmul.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn matmul(a: &Tensor, b: &Tensor) -> Tensor {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `from_vec` and `reshape` are never used
[INFO] [stdout]   --> src/tensor.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl Tensor {
[INFO] [stdout]    | ----------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 48 |     pub fn from_vec(v: Vec<f32>) -> Self {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |     pub fn reshape(&mut self, new_shape: Vec<usize>) {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add`, `mul`, and `matmul` are never used
[INFO] [stdout]    --> src/tensor.rs:101:12
[INFO] [stdout]     |
[INFO] [stdout]  99 | impl Tensor {
[INFO] [stdout]     | ----------- methods in this implementation
[INFO] [stdout] 100 |     /// Elementwise add (Tensor + Tensor)
[INFO] [stdout] 101 |     pub fn add(&self, other: &Tensor) -> Tensor {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |     pub fn mul(&self, other: &Tensor) -> Tensor {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     pub fn matmul(&self, other: &Tensor) -> Tensor {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]   --> src/ops/elementwise.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub fn add(a: &Tensor, b: &Tensor) -> Tensor {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mul` is never used
[INFO] [stdout]   --> src/ops/elementwise.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn mul(a: &Tensor, b: &Tensor) -> Tensor {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matmul` is never used
[INFO] [stdout]   --> src/ops/matmul.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn matmul(a: &Tensor, b: &Tensor) -> Tensor {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "6e4a8040415700d0b9b2dcc76169e01e7fa1207a20e7cc942566bfb8960cd3d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e4a8040415700d0b9b2dcc76169e01e7fa1207a20e7cc942566bfb8960cd3d4", kill_on_drop: false }`
[INFO] [stdout] 6e4a8040415700d0b9b2dcc76169e01e7fa1207a20e7cc942566bfb8960cd3d4
