[INFO] cloning repository https://github.com/AmberThrall/mdbook-environments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AmberThrall/mdbook-environments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmberThrall%2Fmdbook-environments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmberThrall%2Fmdbook-environments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c3c2b8dcc0856c7a8ceb263f0952bf308e437598
[INFO] checking AmberThrall/mdbook-environments against master#568b11762723b001bfa693d0f21c5dad01d4e813 for pr-149518
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAmberThrall%2Fmdbook-environments" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/AmberThrall/mdbook-environments
[INFO] finished tweaking git repo https://github.com/AmberThrall/mdbook-environments
[INFO] tweaked toml for git repo https://github.com/AmberThrall/mdbook-environments written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/AmberThrall/mdbook-environments on toolchain 568b11762723b001bfa693d0f21c5dad01d4e813
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/AmberThrall/mdbook-environments 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" "+568b11762723b001bfa693d0f21c5dad01d4e813" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded upon v0.6.0
[INFO] [stderr]   Downloaded tungstenite v0.17.3
[INFO] [stderr]   Downloaded tokio-tungstenite v0.17.2
[INFO] [stderr]   Downloaded unicode-bidi v0.3.11
[INFO] [stderr]   Downloaded phf_codegen v0.10.0
[INFO] [stderr]   Downloaded topological-sort v0.2.2
[INFO] [stderr]   Downloaded opener v0.5.2
[INFO] [stderr]   Downloaded proc-macro2 v1.0.52
[INFO] [stderr]   Downloaded markup5ever v0.11.0
[INFO] [stderr]   Downloaded ammonia v3.3.0
[INFO] [stderr]   Downloaded html5ever v0.26.0
[INFO] [stderr]   Downloaded warp v0.3.3
[INFO] [stderr]   Downloaded elasticlunr-rs v3.0.1
[INFO] [stderr]   Downloaded pest v2.5.6
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.7
[INFO] [stderr]   Downloaded clap_complete v4.1.4
[INFO] [stderr]   Downloaded pest_meta v2.5.6
[INFO] [stderr]   Downloaded notify-debouncer-mini v0.2.1
[INFO] [stderr]   Downloaded io-lifetimes v1.0.7
[INFO] [stderr]   Downloaded clap v4.1.8
[INFO] [stderr]   Downloaded tempfile v3.4.0
[INFO] [stderr]   Downloaded thiserror v1.0.39
[INFO] [stderr]   Downloaded serde v1.0.156
[INFO] [stderr]   Downloaded clap_lex v0.3.2
[INFO] [stderr]   Downloaded bstr v1.3.0
[INFO] [stderr]   Downloaded pest_generator v2.5.6
[INFO] [stderr]   Downloaded pest_derive v2.5.6
[INFO] [stderr]   Downloaded serde_derive v1.0.156
[INFO] [stderr]   Downloaded thiserror-impl v1.0.39
[INFO] [stderr]   Downloaded siphasher v0.3.10
[INFO] [stderr]   Downloaded string_cache_codegen v0.5.2
[INFO] [stderr]   Downloaded terminal_size v0.2.5
[INFO] [stderr]   Downloaded gitignore v1.0.7
[INFO] [stderr]   Downloaded filetime v0.2.20
[INFO] [stderr]   Downloaded mdbook v0.4.28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 562613b8c9372fd38e3b9f541aaa64b436be1d92badd4fba11e9cb6c5bd03b0e
[INFO] running `Command { std: "docker" "start" "-a" "562613b8c9372fd38e3b9f541aaa64b436be1d92badd4fba11e9cb6c5bd03b0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "562613b8c9372fd38e3b9f541aaa64b436be1d92badd4fba11e9cb6c5bd03b0e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "562613b8c9372fd38e3b9f541aaa64b436be1d92badd4fba11e9cb6c5bd03b0e", kill_on_drop: false }`
[INFO] [stdout] 562613b8c9372fd38e3b9f541aaa64b436be1d92badd4fba11e9cb6c5bd03b0e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55e502de5c4be8a5b4b56f485bfece65144b211a7a92d8fb7c93ebabf0668479
[INFO] running `Command { std: "docker" "start" "-a" "55e502de5c4be8a5b4b56f485bfece65144b211a7a92d8fb7c93ebabf0668479", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.52
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling libc v0.2.140
[INFO] [stderr]     Checking once_cell v1.17.1
[INFO] [stderr]    Compiling serde_derive v1.0.156
[INFO] [stderr]    Compiling serde v1.0.156
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]    Compiling thiserror v1.0.39
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling futures-core v0.3.27
[INFO] [stderr]    Compiling io-lifetimes v1.0.7
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling tokio v1.26.0
[INFO] [stderr]    Compiling phf_shared v0.10.0
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling rustix v0.36.9
[INFO] [stderr]     Checking block-buffer v0.10.4
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]     Checking percent-encoding v2.2.0
[INFO] [stderr]     Checking futures-sink v0.3.27
[INFO] [stderr]    Compiling parking_lot_core v0.9.7
[INFO] [stderr]    Compiling futures-task v0.3.27
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling futures-util v0.3.27
[INFO] [stderr]     Checking digest v0.10.6
[INFO] [stderr]     Checking form_urlencoded v1.1.0
[INFO] [stderr]    Compiling httparse v1.8.0
[INFO] [stderr]     Checking unicode-bidi v0.3.11
[INFO] [stderr]     Checking http v0.2.9
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]     Checking idna v0.3.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.52/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]    Compiling serde_json v1.0.94
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]     Checking base64 v0.13.1
[INFO] [stderr]     Checking futf v0.1.5
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]    Compiling futures-channel v0.3.27
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking tendril v0.4.3
[INFO] [stderr]     Checking phf v0.10.1
[INFO] [stderr]    Compiling mime_guess v2.0.4
[INFO] [stderr]     Checking sha-1 v0.10.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]     Checking unicode-width v0.1.10
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking try-lock v0.2.4
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking clap_lex v0.3.2
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking num-traits v0.2.15
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "55e502de5c4be8a5b4b56f485bfece65144b211a7a92d8fb7c93ebabf0668479", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55e502de5c4be8a5b4b56f485bfece65144b211a7a92d8fb7c93ebabf0668479", kill_on_drop: false }`
[INFO] [stdout] 55e502de5c4be8a5b4b56f485bfece65144b211a7a92d8fb7c93ebabf0668479
