[INFO] cloning repository https://github.com/MengLing-L/algebra
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MengLing-L/algebra" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMengLing-L%2Falgebra", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMengLing-L%2Falgebra'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 63b44fdf72a907233be74ae848d89e7e9f6502e9
[INFO] documenting MengLing-L/algebra against 1.75.0 for beta-1.76-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMengLing-L%2Falgebra" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MengLing-L/algebra on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MengLing-L/algebra
[INFO] finished tweaking git repo https://github.com/MengLing-L/algebra
[INFO] tweaked toml for git repo https://github.com/MengLing-L/algebra written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/MengLing-L/algebra 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded relative v0.2.2
[INFO] [stderr]   Downloaded erased-serde v0.3.21
[INFO] [stderr]   Downloaded plotters-svg v0.3.2
[INFO] [stderr]   Downloaded plotters v0.3.2
[INFO] [stderr]   Downloaded build_id v0.2.1
[INFO] [stderr]   Downloaded plotters-backend v0.3.3
[INFO] [stderr]   Downloaded palaver v0.2.8
[INFO] [stderr]   Downloaded serde_closure v0.3.2
[INFO] [stderr]   Downloaded procinfo v0.4.2
[INFO] [stderr]   Downloaded zeroize v1.5.6
[INFO] [stderr]   Downloaded metatype v0.2.1
[INFO] [stderr]   Downloaded serde_traitobject v0.2.7
[INFO] [stderr]   Downloaded serde_closure_derive v0.3.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa68464666dcb6953944f11cd238ec96e747bd2e6e06e8661f5db7a3e1e600ff
[INFO] running `Command { std: "docker" "start" "-a" "aa68464666dcb6953944f11cd238ec96e747bd2e6e06e8661f5db7a3e1e600ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa68464666dcb6953944f11cd238ec96e747bd2e6e06e8661f5db7a3e1e600ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa68464666dcb6953944f11cd238ec96e747bd2e6e06e8661f5db7a3e1e600ff", kill_on_drop: false }`
[INFO] [stdout] aa68464666dcb6953944f11cd238ec96e747bd2e6e06e8661f5db7a3e1e600ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0785cde30360cf6306029d40763310d327752666e6c1e08d7cf6b167197e3216
[INFO] running `Command { std: "docker" "start" "-a" "0785cde30360cf6306029d40763310d327752666e6c1e08d7cf6b167197e3216", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling serde_derive v1.0.138
[INFO] [stderr]    Compiling serde v1.0.138
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling generic-array v0.14.5
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking typenum v1.15.0
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling procinfo v0.4.2
[INFO] [stderr]    Compiling heapless v0.5.6
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling ucd-trie v0.1.4
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking hash32 v0.1.1
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking nom v2.2.1
[INFO] [stderr]    Compiling build_id v0.2.1
[INFO] [stderr]    Compiling rustversion v1.0.7
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling erased-serde v0.3.21
[INFO] [stderr]    Compiling relative v0.2.2
[INFO] [stderr]     Checking metatype v0.2.1
[INFO] [stderr]     Checking twox-hash v1.6.3
[INFO] [stderr]    Compiling paste v1.0.7
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/metatype-0.2.1/src/lib.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | #![feature(arbitrary_self_types)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/metatype-0.2.1/src/lib.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![feature(ptr_metadata)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/metatype-0.2.1/src/lib.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/metatype-0.2.1/src/lib.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![feature(ptr_metadata)]
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling crossbeam-utils v0.8.10
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metatype` (lib) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0785cde30360cf6306029d40763310d327752666e6c1e08d7cf6b167197e3216", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0785cde30360cf6306029d40763310d327752666e6c1e08d7cf6b167197e3216", kill_on_drop: false }`
[INFO] [stdout] 0785cde30360cf6306029d40763310d327752666e6c1e08d7cf6b167197e3216
