[INFO] fetching crate async-macros 2.0.0...
[INFO] documenting async-macros-2.0.0 against try#6fd27704e643b25711e6a97ec2b04873b411b97d for pr-96676
[INFO] extracting crate async-macros 2.0.0 into /workspace/builds/worker-25/source
[INFO] validating manifest of crates.io crate async-macros 2.0.0 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 async-macros 2.0.0
[INFO] finished tweaking crates.io crate async-macros 2.0.0
[INFO] tweaked toml for crates.io crate async-macros 2.0.0 written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate crates.io crate async-macros 2.0.0 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-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] debe13d0f505c7c473404cb3ffd960cd4ea964d1ef82e3f0cb76246fee470101
[INFO] running `Command { std: "docker" "start" "-a" "debe13d0f505c7c473404cb3ffd960cd4ea964d1ef82e3f0cb76246fee470101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "debe13d0f505c7c473404cb3ffd960cd4ea964d1ef82e3f0cb76246fee470101", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "debe13d0f505c7c473404cb3ffd960cd4ea964d1ef82e3f0cb76246fee470101", kill_on_drop: false }`
[INFO] [stdout] debe13d0f505c7c473404cb3ffd960cd4ea964d1ef82e3f0cb76246fee470101
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] 32ff29d2364a217b4d75a6fb578daadb8279fa509a3bbea623797b770066c697
[INFO] running `Command { std: "docker" "start" "-a" "32ff29d2364a217b4d75a6fb578daadb8279fa509a3bbea623797b770066c697", kill_on_drop: false }`
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]  Documenting async-macros v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]  --> src/try_join.rs:4:33
[INFO] [stdout]   |
[INFO] [stdout] 4 | /// `try_join!` is similar to [`join!`], but completes immediately if any of
[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/try_select.rs:7:35
[INFO] [stdout]   |
[INFO] [stdout] 7 | /// `try_select!` is similar to [`select!`], but keeps going if a future
[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 `async-macros`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name async_macros src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=1ed9c60a2ee5cdb1 -L dependency=/opt/rustwide/target/debug/deps --extern futures_core=/opt/rustwide/target/debug/deps/libfutures_core-2d9c77830e159d4e.rmeta --extern pin_utils=/opt/rustwide/target/debug/deps/libpin_utils-39b8528270a9938e.rmeta --cap-lints=forbid --crate-version 2.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "32ff29d2364a217b4d75a6fb578daadb8279fa509a3bbea623797b770066c697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32ff29d2364a217b4d75a6fb578daadb8279fa509a3bbea623797b770066c697", kill_on_drop: false }`
[INFO] [stdout] 32ff29d2364a217b4d75a6fb578daadb8279fa509a3bbea623797b770066c697