[INFO] fetching crate mdbook-post 0.1.3...
[INFO] checking mdbook-post-0.1.3 against 1.95.0 for pr-155915
[INFO] extracting crate mdbook-post 0.1.3 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate mdbook-post 0.1.3
[INFO] finished tweaking crates.io crate mdbook-post 0.1.3
[INFO] tweaked toml for crates.io crate mdbook-post 0.1.3 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mdbook-post 0.1.3 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mdbook-post 0.1.3 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded itoa v1.0.8
[INFO] [stderr]   Downloaded equivalent v1.0.0
[INFO] [stderr]   Downloaded ryu v1.0.14
[INFO] [stderr]   Downloaded tsu v1.0.1
[INFO] [stderr]   Downloaded thiserror-impl v1.0.43
[INFO] [stderr]   Downloaded serde-transcode v1.1.1
[INFO] [stderr]   Downloaded thiserror v1.0.43
[INFO] [stderr]   Downloaded unicode-ident v1.0.10
[INFO] [stderr]   Downloaded serde_derive v1.0.168
[INFO] [stderr]   Downloaded serde v1.0.168
[INFO] [stderr]   Downloaded serde_yaml v0.9.22
[INFO] [stderr]   Downloaded serde_json v1.0.100
[INFO] [stderr]   Downloaded doe v0.2.37
[INFO] [stderr]   Downloaded hashbrown v0.14.0
[INFO] [stderr]   Downloaded indexmap v2.0.0
[INFO] [stderr]   Downloaded syn v2.0.23
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ee14dedd13a7f67b645cf66d54b83927d50ba92b1a9d85a5659f32ace61faf7
[INFO] running `Command { std: "docker" "start" "-a" "1ee14dedd13a7f67b645cf66d54b83927d50ba92b1a9d85a5659f32ace61faf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ee14dedd13a7f67b645cf66d54b83927d50ba92b1a9d85a5659f32ace61faf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ee14dedd13a7f67b645cf66d54b83927d50ba92b1a9d85a5659f32ace61faf7", kill_on_drop: false }`
[INFO] [stdout] 1ee14dedd13a7f67b645cf66d54b83927d50ba92b1a9d85a5659f32ace61faf7
[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=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" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b9345814c3a86bb77a11d169f9d14d84c3604ce6451a75841811c7fc91e91aa
[INFO] running `Command { std: "docker" "start" "-a" "3b9345814c3a86bb77a11d169f9d14d84c3604ce6451a75841811c7fc91e91aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.168
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling unicode-ident v1.0.10
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]     Checking ryu v1.0.14
[INFO] [stderr]     Checking itoa v1.0.8
[INFO] [stderr]     Checking hashbrown v0.14.0
[INFO] [stderr]    Compiling serde_json v1.0.100
[INFO] [stderr]     Checking equivalent v1.0.0
[INFO] [stderr]     Checking unsafe-libyaml v0.2.8
[INFO] [stderr]     Checking iana-time-zone v0.1.57
[INFO] [stderr]     Checking doe v0.2.37
[INFO] [stderr]    Compiling num-traits v0.2.16
[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-1949cf8c6b5b557f/doe-0.2.37/src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(const_for, const_trait_impl)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `doe` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3b9345814c3a86bb77a11d169f9d14d84c3604ce6451a75841811c7fc91e91aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b9345814c3a86bb77a11d169f9d14d84c3604ce6451a75841811c7fc91e91aa", kill_on_drop: false }`
[INFO] [stdout] 3b9345814c3a86bb77a11d169f9d14d84c3604ce6451a75841811c7fc91e91aa