[INFO] fetching crate rmididings 0.2.1...
[INFO] documenting rmididings-0.2.1 against try#6fd27704e643b25711e6a97ec2b04873b411b97d for pr-96676
[INFO] extracting crate rmididings 0.2.1 into /workspace/builds/worker-19/source
[INFO] validating manifest of crates.io crate rmididings 0.2.1 on toolchain 6fd27704e643b25711e6a97ec2b04873b411b97d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rmididings 0.2.1
[INFO] finished tweaking crates.io crate rmididings 0.2.1
[INFO] tweaked toml for crates.io crate rmididings 0.2.1 written to /workspace/builds/worker-19/source/Cargo.toml
[INFO] crate crates.io crate rmididings 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 60caf060ed665bcf00cdb34287259f1e58090930ed1de0e3d6df4642a5872d30
[INFO] running `Command { std: "docker" "start" "-a" "60caf060ed665bcf00cdb34287259f1e58090930ed1de0e3d6df4642a5872d30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "60caf060ed665bcf00cdb34287259f1e58090930ed1de0e3d6df4642a5872d30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60caf060ed665bcf00cdb34287259f1e58090930ed1de0e3d6df4642a5872d30", kill_on_drop: false }`
[INFO] [stdout] 60caf060ed665bcf00cdb34287259f1e58090930ed1de0e3d6df4642a5872d30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5bb6de26912c4ecbe4dd42a618f4cac3976d406bb70dbc6975d7e59527dca8c2
[INFO] running `Command { std: "docker" "start" "-a" "5bb6de26912c4ecbe4dd42a618f4cac3976d406bb70dbc6975d7e59527dca8c2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking rosc v0.5.2
[INFO] [stderr]    Compiling alsa-sys v0.3.1
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking alsa v0.5.0
[INFO] [stderr]  Documenting rmididings v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]  --> src/proc/filter_chain.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 | /// See the [Chain!] and [Fork!] macros.
[INFO] [stdout]   |              ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[deny(rustdoc::macro_rules_fallback)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]  --> src/proc/filter_chain.rs:8:27
[INFO] [stdout]   |
[INFO] [stdout] 8 | /// See the [Chain!] and [Fork!] macros.
[INFO] [stdout]   |                           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `rmididings`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name rmididings src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="alsa"' --cfg 'feature="default"' --cfg 'feature="osc"' --cfg 'feature="rosc"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ef29bff88da90633 -L dependency=/opt/rustwide/target/debug/deps --extern alsa=/opt/rustwide/target/debug/deps/libalsa-a7922c725a725ed9.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-3ab88692cefefc3e.rmeta --extern rosc=/opt/rustwide/target/debug/deps/librosc-fd7dc1cc959d0a19.rmeta --cap-lints=forbid --crate-version 0.2.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "5bb6de26912c4ecbe4dd42a618f4cac3976d406bb70dbc6975d7e59527dca8c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bb6de26912c4ecbe4dd42a618f4cac3976d406bb70dbc6975d7e59527dca8c2", kill_on_drop: false }`
[INFO] [stdout] 5bb6de26912c4ecbe4dd42a618f4cac3976d406bb70dbc6975d7e59527dca8c2