[INFO] fetching crate libffi 3.0.0...
[INFO] documenting libffi-3.0.0 against try#6fd27704e643b25711e6a97ec2b04873b411b97d for pr-96676
[INFO] extracting crate libffi 3.0.0 into /workspace/builds/worker-81/source
[INFO] validating manifest of crates.io crate libffi 3.0.0 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 libffi 3.0.0
[INFO] finished tweaking crates.io crate libffi 3.0.0
[INFO] tweaked toml for crates.io crate libffi 3.0.0 written to /workspace/builds/worker-81/source/Cargo.toml
[INFO] crate crates.io crate libffi 3.0.0 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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] fcc7b8afa27ee411eb2791292730e91ba08923bd008cf016785f4af483704e51
[INFO] running `Command { std: "docker" "start" "-a" "fcc7b8afa27ee411eb2791292730e91ba08923bd008cf016785f4af483704e51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fcc7b8afa27ee411eb2791292730e91ba08923bd008cf016785f4af483704e51", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fcc7b8afa27ee411eb2791292730e91ba08923bd008cf016785f4af483704e51", kill_on_drop: false }`
[INFO] [stdout] fcc7b8afa27ee411eb2791292730e91ba08923bd008cf016785f4af483704e51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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] 73add9368533bd5e4f93d212e76a6c120c18e73ec4ced1bcb21d0bc0fc73aa9a
[INFO] running `Command { std: "docker" "start" "-a" "73add9368533bd5e4f93d212e76a6c120c18e73ec4ced1bcb21d0bc0fc73aa9a", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]     Checking abort_on_panic v2.0.0
[INFO] [stderr]    Compiling libffi-sys v2.0.0
[INFO] [stderr]  Documenting libffi v3.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]   --> src/high/call.rs:59:34
[INFO] [stdout]    |
[INFO] [stdout] 59 | /// To reduce boilerplate, see [`ffi_call!`].
[INFO] [stdout]    |                                  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(rustdoc::macro_rules_fallback)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `Cif`
[INFO] [stdout]   --> src/middle/types.rs:58:23
[INFO] [stdout]    |
[INFO] [stdout] 58 | /// when creating a [`Cif`].
[INFO] [stdout]    |                       ^^^ no item named `Cif` in scope
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout]    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `libffi`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name libffi src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=ec73f4b6a1aad2b9 -L dependency=/opt/rustwide/target/debug/deps --extern abort_on_panic=/opt/rustwide/target/debug/deps/libabort_on_panic-daf2a1212ee96d1b.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-6a685a183885f2de.rmeta --extern libffi_sys=/opt/rustwide/target/debug/deps/liblibffi_sys-3fcd0edfdbd0e115.rmeta --cap-lints=forbid --crate-version 3.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "73add9368533bd5e4f93d212e76a6c120c18e73ec4ced1bcb21d0bc0fc73aa9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73add9368533bd5e4f93d212e76a6c120c18e73ec4ced1bcb21d0bc0fc73aa9a", kill_on_drop: false }`
[INFO] [stdout] 73add9368533bd5e4f93d212e76a6c120c18e73ec4ced1bcb21d0bc0fc73aa9a