[INFO] fetching crate fstrings 0.2.4-rc2...
[INFO] documenting fstrings-0.2.4-rc2 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate fstrings 0.2.4-rc2 into /workspace/builds/worker-34/source
[INFO] validating manifest of crates.io crate fstrings 0.2.4-rc2 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fstrings 0.2.4-rc2
[INFO] finished tweaking crates.io crate fstrings 0.2.4-rc2
[INFO] tweaked toml for crates.io crate fstrings 0.2.4-rc2 written to /workspace/builds/worker-34/source/Cargo.toml
[INFO] crate crates.io crate fstrings 0.2.4-rc2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fd8bd1630852699305d4e5c3acbd0c97a4c880221965fbf5170af4e03e4d2cf3
[INFO] running `Command { std: "docker" "start" "-a" "fd8bd1630852699305d4e5c3acbd0c97a4c880221965fbf5170af4e03e4d2cf3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd8bd1630852699305d4e5c3acbd0c97a4c880221965fbf5170af4e03e4d2cf3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd8bd1630852699305d4e5c3acbd0c97a4c880221965fbf5170af4e03e4d2cf3", kill_on_drop: false }`
[INFO] [stdout] fd8bd1630852699305d4e5c3acbd0c97a4c880221965fbf5170af4e03e4d2cf3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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=warn" "-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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e03b1a614bf1929da68d69257300940227bde7eecb52050a3700fa568eba12f
[INFO] running `Command { std: "docker" "start" "-a" "3e03b1a614bf1929da68d69257300940227bde7eecb52050a3700fa568eba12f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling fstrings-proc-macro v0.2.4-rc2
[INFO] [stderr]  Documenting fstrings v0.2.4-rc2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.50s
[INFO] running `Command { std: "docker" "inspect" "3e03b1a614bf1929da68d69257300940227bde7eecb52050a3700fa568eba12f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e03b1a614bf1929da68d69257300940227bde7eecb52050a3700fa568eba12f", kill_on_drop: false }`
[INFO] [stdout] 3e03b1a614bf1929da68d69257300940227bde7eecb52050a3700fa568eba12f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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=warn" "-e" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-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" "+beta-2022-05-20" "rustdoc" "--lib" "-Zrustdoc-map" "--features" "nightly" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 7747d999dd7b809ff32b378f341288475b7902b339eb2dc9598c0f4eb98d6cd2
[INFO] running `Command { std: "docker" "start" "-a" "7747d999dd7b809ff32b378f341288475b7902b339eb2dc9598c0f4eb98d6cd2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling fstrings-proc-macro v0.2.4-rc2
[INFO] [stderr]  Documenting fstrings v0.2.4-rc2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     feature(external_doc)
[INFO] [stdout]   |             ^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: use #[doc = include_str!("filename")] instead, which handles macro invocations
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `fstrings`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name fstrings src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="nightly"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat -Z unstable-options --document-private-items -C metadata=b6647e0152452a81 -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro=/opt/rustwide/target/debug/deps/libfstrings_proc_macro-525a25dda30d9a46.so --extern proc_macro_hack=/opt/rustwide/target/debug/deps/libproc_macro_hack-74095d1a79241a04.so --extern-html-root-url 'fstrings_proc_macro=https://docs.rs/fstrings-proc-macro/0.2.4-rc2/' --extern-html-root-url 'proc_macro_hack=https://docs.rs/proc-macro-hack/0.5.19/' -Zunstable-options --crate-version 0.2.4-rc2` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "7747d999dd7b809ff32b378f341288475b7902b339eb2dc9598c0f4eb98d6cd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7747d999dd7b809ff32b378f341288475b7902b339eb2dc9598c0f4eb98d6cd2", kill_on_drop: false }`
[INFO] [stdout] 7747d999dd7b809ff32b378f341288475b7902b339eb2dc9598c0f4eb98d6cd2