[INFO] fetching crate approx 0.5.1...
[INFO] documenting approx-0.5.1 against try#6fd27704e643b25711e6a97ec2b04873b411b97d for pr-96676
[INFO] extracting crate approx 0.5.1 into /workspace/builds/worker-77/source
[INFO] validating manifest of crates.io crate approx 0.5.1 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 approx 0.5.1
[INFO] finished tweaking crates.io crate approx 0.5.1
[INFO] tweaked toml for crates.io crate approx 0.5.1 written to /workspace/builds/worker-77/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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] 664084eb2cccb1c3eecce58cfbf4df59cd120eb5b7c8833d8dd9fa860a7792b2
[INFO] running `Command { std: "docker" "start" "-a" "664084eb2cccb1c3eecce58cfbf4df59cd120eb5b7c8833d8dd9fa860a7792b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "664084eb2cccb1c3eecce58cfbf4df59cd120eb5b7c8833d8dd9fa860a7792b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "664084eb2cccb1c3eecce58cfbf4df59cd120eb5b7c8833d8dd9fa860a7792b2", kill_on_drop: false }`
[INFO] [stdout] 664084eb2cccb1c3eecce58cfbf4df59cd120eb5b7c8833d8dd9fa860a7792b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-77/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] f17226ba6d62cfe7c8d996f723830f532f9e899f8171229810359d9987b549cb
[INFO] running `Command { std: "docker" "start" "-a" "f17226ba6d62cfe7c8d996f723830f532f9e899f8171229810359d9987b549cb", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]  Documenting approx v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]   --> src/abs_diff_eq.rs:15:67
[INFO] [stdout]    |
[INFO] [stdout] 15 |     /// This is used when no `epsilon` value is supplied to the [`abs_diff_eq!`], [`relative_eq!`],
[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/abs_diff_eq.rs:15:85
[INFO] [stdout]    |
[INFO] [stdout] 15 |     /// This is used when no `epsilon` value is supplied to the [`abs_diff_eq!`], [`relative_eq!`],
[INFO] [stdout]    |                                                                                     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]   --> src/abs_diff_eq.rs:16:14
[INFO] [stdout]    |
[INFO] [stdout] 16 |     /// or [`ulps_eq!`] macros.
[INFO] [stdout]    |              ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]   --> src/relative_eq.rs:14:72
[INFO] [stdout]    |
[INFO] [stdout] 14 |     /// This is used when no `max_relative` value is supplied to the [`relative_eq`] macro.
[INFO] [stdout]    |                                                                        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]   --> src/ulps_eq.rs:16:68
[INFO] [stdout]    |
[INFO] [stdout] 16 |     /// This is used when no `max_ulps` value is supplied to the [`ulps_eq`] macro.
[INFO] [stdout]    |                                                                    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `approx`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name approx src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="std"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=f3ea6f702f8b7ef7 -L dependency=/opt/rustwide/target/debug/deps --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-9ddb5d0f7711e83e.rmeta --cap-lints=forbid --crate-version 0.5.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "f17226ba6d62cfe7c8d996f723830f532f9e899f8171229810359d9987b549cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f17226ba6d62cfe7c8d996f723830f532f9e899f8171229810359d9987b549cb", kill_on_drop: false }`
[INFO] [stdout] f17226ba6d62cfe7c8d996f723830f532f9e899f8171229810359d9987b549cb