[INFO] fetching crate np_core 0.1.0...
[INFO] testing np_core-0.1.0 against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] extracting crate np_core 0.1.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate np_core 0.1.0 on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate np_core 0.1.0
[INFO] finished tweaking crates.io crate np_core 0.1.0
[INFO] tweaked toml for crates.io crate np_core 0.1.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3badec5e71620998542b190e80865f7156bd6f1da5ad7d3adb3567d8ca7eaa25
[INFO] running `Command { std: "docker" "start" "-a" "3badec5e71620998542b190e80865f7156bd6f1da5ad7d3adb3567d8ca7eaa25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3badec5e71620998542b190e80865f7156bd6f1da5ad7d3adb3567d8ca7eaa25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3badec5e71620998542b190e80865f7156bd6f1da5ad7d3adb3567d8ca7eaa25", kill_on_drop: false }`
[INFO] [stdout] 3badec5e71620998542b190e80865f7156bd6f1da5ad7d3adb3567d8ca7eaa25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3fdb64bc645b28096a7c8140bf5af81bfc9c85314cdb1f984ba9e739d7e0ec39
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3fdb64bc645b28096a7c8140bf5af81bfc9c85314cdb1f984ba9e739d7e0ec39", kill_on_drop: false }`
[INFO] [stderr]    Compiling np_core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Ref`
[INFO] [stdout]  --> src/lib.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub struct Ref<T> where T: 'static {
[INFO] [stdout]   |                ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3fdb64bc645b28096a7c8140bf5af81bfc9c85314cdb1f984ba9e739d7e0ec39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fdb64bc645b28096a7c8140bf5af81bfc9c85314cdb1f984ba9e739d7e0ec39", kill_on_drop: false }`
[INFO] [stdout] 3fdb64bc645b28096a7c8140bf5af81bfc9c85314cdb1f984ba9e739d7e0ec39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0707f75d8fbb946af7712e715a756f9db6e3412ca0ffbe2645bfeefc28bbeddf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0707f75d8fbb946af7712e715a756f9db6e3412ca0ffbe2645bfeefc28bbeddf", kill_on_drop: false }`
[INFO] [stdout] warning: struct is never constructed: `Ref`
[INFO] [stdout]  --> src/lib.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub struct Ref<T> where T: 'static {
[INFO] [stdout]   |                ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling np_core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Ref`
[INFO] [stdout]  --> src/lib.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub struct Ref<T> where T: 'static {
[INFO] [stdout]   |                ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "0707f75d8fbb946af7712e715a756f9db6e3412ca0ffbe2645bfeefc28bbeddf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0707f75d8fbb946af7712e715a756f9db6e3412ca0ffbe2645bfeefc28bbeddf", kill_on_drop: false }`
[INFO] [stdout] 0707f75d8fbb946af7712e715a756f9db6e3412ca0ffbe2645bfeefc28bbeddf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d0d6983f3488b8f63a00c04838bbdcb61f11e147edd726b5462af2c233e0a992
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d0d6983f3488b8f63a00c04838bbdcb61f11e147edd726b5462af2c233e0a992", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: struct is never constructed: `Ref`
[INFO] [stdout] running 0 tests
[INFO] [stderr]  --> src/lib.rs:6:16
[INFO] [stdout] 
[INFO] [stderr]   |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 6 |     pub struct Ref<T> where T: 'static {
[INFO] [stdout] 
[INFO] [stderr]   |                ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Ref`
[INFO] [stderr]  --> src/lib.rs:6:16
[INFO] [stderr]   |
[INFO] [stderr] 6 |     pub struct Ref<T> where T: 'static {
[INFO] [stderr]   |                ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/np_core-6ca9359e82a51f5e)
[INFO] [stderr]    Doc-tests np_core
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d0d6983f3488b8f63a00c04838bbdcb61f11e147edd726b5462af2c233e0a992", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0d6983f3488b8f63a00c04838bbdcb61f11e147edd726b5462af2c233e0a992", kill_on_drop: false }`
[INFO] [stdout] d0d6983f3488b8f63a00c04838bbdcb61f11e147edd726b5462af2c233e0a992