[INFO] fetching crate docs_to_markdown 0.1.4...
[INFO] checking docs_to_markdown-0.1.4 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] extracting crate docs_to_markdown 0.1.4 into /workspace/builds/worker-7-tc1/source
[INFO] removed /workspace/builds/worker-7-tc1/source/rust-toolchain
[INFO] started tweaking crates.io crate docs_to_markdown 0.1.4
[INFO] finished tweaking crates.io crate docs_to_markdown 0.1.4
[INFO] tweaked toml for crates.io crate docs_to_markdown 0.1.4 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate docs_to_markdown 0.1.4 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate docs_to_markdown 0.1.4 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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded select v0.6.0
[INFO] [stderr]   Downloaded xml5ever v0.17.0
[INFO] [stderr]   Downloaded parking_lot_core v0.9.5
[INFO] [stderr]   Downloaded string_cache v0.8.4
[INFO] [stderr]   Downloaded ipnet v2.6.0
[INFO] [stderr]   Downloaded openssl-sys v0.9.79
[INFO] [stderr]   Downloaded reqwest v0.11.13
[INFO] [stderr]   Downloaded openssl v0.10.44
[INFO] [stderr]   Downloaded markup5ever_rcdom v0.2.0
[INFO] [stderr]   Downloaded tokio v1.23.0
[INFO] [stderr]   Downloaded serde_json v1.0.89
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7faca1559ecf11144f617785a9c1f498292eb783abfa2a5ffe8b3d6df3c33292
[INFO] running `Command { std: "docker" "start" "-a" "7faca1559ecf11144f617785a9c1f498292eb783abfa2a5ffe8b3d6df3c33292", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7faca1559ecf11144f617785a9c1f498292eb783abfa2a5ffe8b3d6df3c33292", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7faca1559ecf11144f617785a9c1f498292eb783abfa2a5ffe8b3d6df3c33292", kill_on_drop: false }`
[INFO] [stdout] 7faca1559ecf11144f617785a9c1f498292eb783abfa2a5ffe8b3d6df3c33292
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a0e3a93aa2312715355212532c8c5885430cc4e72f44f0dd00f04abdbc0d8fb7
[INFO] running `Command { std: "docker" "start" "-a" "a0e3a93aa2312715355212532c8c5885430cc4e72f44f0dd00f04abdbc0d8fb7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking once_cell v1.16.0
[INFO] [stderr]    Compiling syn v1.0.105
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling cc v1.0.77
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]    Compiling serde v1.0.149
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling lock_api v0.4.9
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]     Checking bytes v1.3.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.5
[INFO] [stderr]    Compiling tokio v1.23.0
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking phf_shared v0.10.0
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]    Compiling futures-task v0.3.25
[INFO] [stderr]     Checking itoa v1.0.4
[INFO] [stderr]     Checking futf v0.1.5
[INFO] [stderr]     Checking tracing-core v0.1.30
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling openssl v0.10.44
[INFO] [stderr]    Compiling futures-util v0.3.25
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking tendril v0.4.3
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/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 phf v0.10.1
[INFO] [stderr]    Compiling futures-channel v0.3.25
[INFO] [stderr]     Checking futures-io v0.3.25
[INFO] [stderr]    Compiling io-lifetimes v1.0.3
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]     Checking futures-sink v0.3.25
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking tinyvec v1.6.0
[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" "a0e3a93aa2312715355212532c8c5885430cc4e72f44f0dd00f04abdbc0d8fb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0e3a93aa2312715355212532c8c5885430cc4e72f44f0dd00f04abdbc0d8fb7", kill_on_drop: false }`
[INFO] [stdout] a0e3a93aa2312715355212532c8c5885430cc4e72f44f0dd00f04abdbc0d8fb7