[INFO] fetching crate np_core 0.1.0...
[INFO] testing np_core-0.1.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate np_core 0.1.0 into /workspace/builds/worker-6-tc2/source
[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-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate np_core 0.1.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "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" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3d8d9fbe6d0290ca98b774912a4fdae2dab3127d26517459007d622e5ff86aaa
[INFO] running `Command { std: "docker" "start" "-a" "3d8d9fbe6d0290ca98b774912a4fdae2dab3127d26517459007d622e5ff86aaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d8d9fbe6d0290ca98b774912a4fdae2dab3127d26517459007d622e5ff86aaa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d8d9fbe6d0290ca98b774912a4fdae2dab3127d26517459007d622e5ff86aaa", kill_on_drop: false }`
[INFO] [stdout] 3d8d9fbe6d0290ca98b774912a4fdae2dab3127d26517459007d622e5ff86aaa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4419d34e8fd82cf52715928738c5ccf1d3d749835b3ef28db3dc134a87e0d9f0
[INFO] running `Command { std: "docker" "start" "-a" "4419d34e8fd82cf52715928738c5ccf1d3d749835b3ef28db3dc134a87e0d9f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling np_core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Constructable` is never used
[INFO] [stdout]  --> src/lib.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub trait Constructable {
[INFO] [stdout]   |               ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ref` is never constructed
[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] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "4419d34e8fd82cf52715928738c5ccf1d3d749835b3ef28db3dc134a87e0d9f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4419d34e8fd82cf52715928738c5ccf1d3d749835b3ef28db3dc134a87e0d9f0", kill_on_drop: false }`
[INFO] [stdout] 4419d34e8fd82cf52715928738c5ccf1d3d749835b3ef28db3dc134a87e0d9f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38016d071f86e95d1b59d0d78d21ff06a70729f8b46917ebc13373c82e7f76bf
[INFO] running `Command { std: "docker" "start" "-a" "38016d071f86e95d1b59d0d78d21ff06a70729f8b46917ebc13373c82e7f76bf", kill_on_drop: false }`
[INFO] [stdout] warning: trait `Constructable` is never used
[INFO] [stdout]  --> src/lib.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub trait Constructable {
[INFO] [stdout]   |               ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ref` is never constructed
[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] 
[INFO] [stderr]    Compiling np_core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait `Constructable` is never used
[INFO] [stdout]  --> src/lib.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub trait Constructable {
[INFO] [stdout]   |               ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ref` is never constructed
[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] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "38016d071f86e95d1b59d0d78d21ff06a70729f8b46917ebc13373c82e7f76bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38016d071f86e95d1b59d0d78d21ff06a70729f8b46917ebc13373c82e7f76bf", kill_on_drop: false }`
[INFO] [stdout] 38016d071f86e95d1b59d0d78d21ff06a70729f8b46917ebc13373c82e7f76bf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c578fe45cec08fa24c1d5d74ad56166a42f6121d30e7f470684c3780a0cbc81a
[INFO] running `Command { std: "docker" "start" "-a" "c578fe45cec08fa24c1d5d74ad56166a42f6121d30e7f470684c3780a0cbc81a", kill_on_drop: false }`
[INFO] [stderr] warning: trait `Constructable` is never used
[INFO] [stderr]  --> src/lib.rs:2:15
[INFO] [stderr]   |
[INFO] [stderr] 2 |     pub trait Constructable {
[INFO] [stderr]   |               ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Ref` is never constructed
[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] warning: `np_core` (lib) generated 2 warnings
[INFO] [stderr] warning: `np_core` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/np_core-ccaa4ab7dbea60f6)
[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] [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" "c578fe45cec08fa24c1d5d74ad56166a42f6121d30e7f470684c3780a0cbc81a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c578fe45cec08fa24c1d5d74ad56166a42f6121d30e7f470684c3780a0cbc81a", kill_on_drop: false }`
[INFO] [stdout] c578fe45cec08fa24c1d5d74ad56166a42f6121d30e7f470684c3780a0cbc81a