[INFO] fetching crate doh-dns 0.2.0...
[INFO] documenting doh-dns-0.2.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate doh-dns 0.2.0 into /workspace/builds/worker-61/source
[INFO] validating manifest of crates.io crate doh-dns 0.2.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate doh-dns 0.2.0
[INFO] finished tweaking crates.io crate doh-dns 0.2.0
[INFO] tweaked toml for crates.io crate doh-dns 0.2.0 written to /workspace/builds/worker-61/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d8db5ed997f30bbff8f7153d73ec64cebb27967819270f34403b02da8218f244
[INFO] running `Command { std: "docker" "start" "-a" "d8db5ed997f30bbff8f7153d73ec64cebb27967819270f34403b02da8218f244", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d8db5ed997f30bbff8f7153d73ec64cebb27967819270f34403b02da8218f244", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8db5ed997f30bbff8f7153d73ec64cebb27967819270f34403b02da8218f244", kill_on_drop: false }`
[INFO] [stdout] d8db5ed997f30bbff8f7153d73ec64cebb27967819270f34403b02da8218f244
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-61/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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b2e1ea932d12020df143910eeeb825b25539d194db3c86110c9ef5cbba9d815
[INFO] running `Command { std: "docker" "start" "-a" "0b2e1ea932d12020df143910eeeb825b25539d194db3c86110c9ef5cbba9d815", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]     Checking slab v0.4.6
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]    Compiling openssl v0.10.40
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling httparse v1.7.1
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling native-tls v0.2.10
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]     Checking openssl-probe v0.1.5
[INFO] [stderr]     Checking try-lock v0.2.3
[INFO] [stderr]    Compiling async-trait v0.1.53
[INFO] [stderr]     Checking tower-service v0.3.1
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking httpdate v0.3.2
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[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]     Checking tracing-core v0.1.26
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]     Checking http v0.2.7
[INFO] [stderr]    Compiling num-traits v0.2.15
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[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.43
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[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]    Compiling openssl-sys v0.9.73
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[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling pin-project-internal v1.0.10
[INFO] [stderr]    Compiling openssl-macros v0.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking pin-project v1.0.10
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]     Checking hyper v0.13.10
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]  Documenting doh-dns v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:59:1
[INFO] [stdout]    |
[INFO] [stdout] 59 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:60:1
[INFO] [stdout]    |
[INFO] [stdout] 60 | #![feature(stmt_expr_attributes)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `doh-dns`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name doh_dns src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=b8cbec3957dd11d7 -L dependency=/opt/rustwide/target/debug/deps --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-81eef4b575aa068a.so --extern futures_util=/opt/rustwide/target/debug/deps/libfutures_util-69cbc4bc36899266.rmeta --extern hyper=/opt/rustwide/target/debug/deps/libhyper-94716e3b4416aa44.rmeta --extern hyper_tls=/opt/rustwide/target/debug/deps/libhyper_tls-43d0fbb10ab5ee48.rmeta --extern idna=/opt/rustwide/target/debug/deps/libidna-7e90fb3f6f63dec5.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-11fcf639aa746c8b.rmeta --extern native_tls=/opt/rustwide/target/debug/deps/libnative_tls-5d80750f76a37eed.rmeta --extern num=/opt/rustwide/target/debug/deps/libnum-e573c973b9fc42cf.rmeta --extern num_derive=/opt/rustwide/target/debug/deps/libnum_derive-650a8be147051cc8.so --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-9d0fb7f65d2860a4.rmeta --extern paste=/opt/rustwide/target/debug/deps/libpaste-41be4954267ff1d2.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-495ec9fdc6b7531e.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-2a511bab50b9440c.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-46fc30c329c07e99.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-5dee42bce4e92915.rmeta --extern tower_service=/opt/rustwide/target/debug/deps/libtower_service-3730c7375171f9fc.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "0b2e1ea932d12020df143910eeeb825b25539d194db3c86110c9ef5cbba9d815", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b2e1ea932d12020df143910eeeb825b25539d194db3c86110c9ef5cbba9d815", kill_on_drop: false }`
[INFO] [stdout] 0b2e1ea932d12020df143910eeeb825b25539d194db3c86110c9ef5cbba9d815