[INFO] fetching crate futhorc 0.1.6...
[INFO] documenting futhorc-0.1.6 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate futhorc 0.1.6 into /workspace/builds/worker-60/source
[INFO] validating manifest of crates.io crate futhorc 0.1.6 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate futhorc 0.1.6
[INFO] finished tweaking crates.io crate futhorc 0.1.6
[INFO] tweaked toml for crates.io crate futhorc 0.1.6 written to /workspace/builds/worker-60/source/Cargo.toml
[INFO] crate crates.io crate futhorc 0.1.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded atom_syndication v0.9.1
[INFO] [stderr]   Downloaded gtmpl v0.6.0
[INFO] [stderr]   Downloaded gtmpl_derive v0.4.0
[INFO] [stderr]   Downloaded gtmpl_value v0.4.0
[INFO] [stderr]   Downloaded quick-xml v0.20.0
[INFO] [stderr]   Downloaded diligent-date-parser v0.1.2
[INFO] [stderr]   Downloaded syn v1.0.61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d84145688983a764cfa58099e8e8d84093f45e640a822d83cf4b23024c45d85
[INFO] running `Command { std: "docker" "start" "-a" "5d84145688983a764cfa58099e8e8d84093f45e640a822d83cf4b23024c45d85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d84145688983a764cfa58099e8e8d84093f45e640a822d83cf4b23024c45d85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d84145688983a764cfa58099e8e8d84093f45e640a822d83cf4b23024c45d85", kill_on_drop: false }`
[INFO] [stdout] 5d84145688983a764cfa58099e8e8d84093f45e640a822d83cf4b23024c45d85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6eb2b3230469081d81f4ed3594d0e644a35db23f071fb811893d22c362f87a5e
[INFO] running `Command { std: "docker" "start" "-a" "6eb2b3230469081d81f4ed3594d0e644a35db23f071fb811893d22c362f87a5e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.61
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling derive_builder v0.9.0
[INFO] [stderr]    Compiling serde v1.0.124
[INFO] [stderr]    Compiling pulldown-cmark v0.8.0
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking deunicode v0.4.3
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking dtoa v0.4.7
[INFO] [stderr]    Compiling gtmpl_value v0.4.0
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking slug v0.1.4
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking gtmpl v0.6.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking quick-xml v0.20.0
[INFO] [stderr]     Checking diligent-date-parser v0.1.2
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling gtmpl_derive v0.4.0
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling derive_builder_core v0.9.0
[INFO] [stderr]     Checking atom_syndication v0.9.1
[INFO] [stderr]     Checking serde_yaml v0.8.17
[INFO] [stderr]  Documenting futhorc v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | #![feature(map_into_keys_values)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `futhorc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name futhorc src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern atom_syndication=/opt/rustwide/target/debug/deps/libatom_syndication-1603827b896e4196.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-e5e069fa20ee7bee.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-e59278ba931eb828.rmeta --extern gtmpl=/opt/rustwide/target/debug/deps/libgtmpl-8578f95586c42dfb.rmeta --extern gtmpl_derive=/opt/rustwide/target/debug/deps/libgtmpl_derive-fc909731b77dd721.so --extern gtmpl_value=/opt/rustwide/target/debug/deps/libgtmpl_value-cf66d824d5675090.rmeta --extern pulldown_cmark=/opt/rustwide/target/debug/deps/libpulldown_cmark-dfb63af71f3a27a6.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-fa2d328bfb3725da.rmeta --extern serde_yaml=/opt/rustwide/target/debug/deps/libserde_yaml-05e3da8a8acaf9a4.rmeta --extern slug=/opt/rustwide/target/debug/deps/libslug-f90d517dfa47bef3.rmeta --cap-lints=warn --crate-version 0.1.6` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "6eb2b3230469081d81f4ed3594d0e644a35db23f071fb811893d22c362f87a5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6eb2b3230469081d81f4ed3594d0e644a35db23f071fb811893d22c362f87a5e", kill_on_drop: false }`
[INFO] [stdout] 6eb2b3230469081d81f4ed3594d0e644a35db23f071fb811893d22c362f87a5e
