[INFO] cloning repository https://github.com/google/mosaic
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/google/mosaic" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgoogle%2Fmosaic", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgoogle%2Fmosaic'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 345566951a795e69809dca52619631821e2897ed
[INFO] documenting google/mosaic against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgoogle%2Fmosaic" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/google/mosaic 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] removed /workspace/builds/worker-5/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-5/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/google/mosaic
[INFO] finished tweaking git repo https://github.com/google/mosaic
[INFO] tweaked toml for git repo https://github.com/google/mosaic written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/google/mosaic 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] c96b6e56b772a71546eafa0b56685f997f403b417adc1d04f49963b86bb7c8e5
[INFO] running `Command { std: "docker" "start" "-a" "c96b6e56b772a71546eafa0b56685f997f403b417adc1d04f49963b86bb7c8e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c96b6e56b772a71546eafa0b56685f997f403b417adc1d04f49963b86bb7c8e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c96b6e56b772a71546eafa0b56685f997f403b417adc1d04f49963b86bb7c8e5", kill_on_drop: false }`
[INFO] [stdout] c96b6e56b772a71546eafa0b56685f997f403b417adc1d04f49963b86bb7c8e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] d70a5f14edd523e4664dbd43e9d6f8e8caad444a70dc560e41799525e2cb29bf
[INFO] running `Command { std: "docker" "start" "-a" "d70a5f14edd523e4664dbd43e9d6f8e8caad444a70dc560e41799525e2cb29bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling libc v0.2.73
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking instant v0.1.6
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking smallvec v1.4.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling unindent v0.1.6
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking cc v1.0.58
[INFO] [stderr]     Checking libloading v0.7.0
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking codespan-reporting v0.9.5
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.3
[INFO] [stderr]    Compiling clang-sys v1.2.0
[INFO] [stderr]    Compiling hashbrown v0.8.1
[INFO] [stderr]    Compiling indexmap v1.5.0
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking codespan v0.9.5
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking quote v1.0.7
[INFO] [stderr]     Checking parking_lot_core v0.8.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking parking_lot v0.11.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking clang v1.0.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking cc_use_common v0.1.0 (/opt/rustwide/workdir/cc_use_common)
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling salsa-macros v0.14.1
[INFO] [stderr]    Compiling gen_macro_impl v0.1.0 (/opt/rustwide/workdir/gen_macro/impl)
[INFO] [stderr]    Compiling rental-impl v0.5.5
[INFO] [stderr]     Checking gen_macro v0.1.0 (/opt/rustwide/workdir/gen_macro)
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking salsa v0.14.4
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stderr]     Checking rental v0.5.6
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking trybuild v1.0.30 (https://github.com/tmandry/trybuild.git?branch=strategy#1a5990c4)
[INFO] [stderr]  Documenting mosaic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking mosaic v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: using `procedural-masquerade` crate
[INFO] [stdout]    --> src/libclang/mod.rs:310:1
[INFO] [stdout]     |
[INFO] [stdout] 310 | / rental! {
[INFO] [stdout] 311 | |     mod rent {
[INFO] [stdout] 312 | |         use super::*;
[INFO] [stdout] 313 | |
[INFO] [stdout] ...   |
[INFO] [stdout] 347 | |     }
[INFO] [stdout] 348 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(proc_macro_back_compat)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #83125 <https://github.com/rust-lang/rust/issues/83125>
[INFO] [stdout]     = note: The `procedural-masquerade` crate has been unnecessary since Rust 1.30.0. Versions of this crate below 0.1.7 will eventually stop compiling.
[INFO] [stdout]     = note: this error originates in the macro `rental` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1st rule of macro `print_indent` is never used
[INFO] [stdout]   --> src/util.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     ($self: expr, $fmt:expr) => { print_indent!($self, $fmt,) };
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macro_rules)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1st rule of macro `println_indent` is never used
[INFO] [stdout]   --> src/util.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     ($self:expr, $fmt:expr) => { println_indent!($self, $fmt,) };
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[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 `mosaic`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name mosaic src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c9f4eab7472b2313 -L dependency=/opt/rustwide/target/debug/deps --extern cc_crate=/opt/rustwide/target/debug/deps/libcc-8e6e39dd5eb6e5b1.rmeta --extern cc_use_common=/opt/rustwide/target/debug/deps/libcc_use_common-c66f97e9d9208b9c.rmeta --extern clang=/opt/rustwide/target/debug/deps/libclang-2f6ddd355cc0f53e.rmeta --extern clang_sys=/opt/rustwide/target/debug/deps/libclang_sys-519be49acb4db362.rmeta --extern codespan=/opt/rustwide/target/debug/deps/libcodespan-051f11d33051222f.rmeta --extern codespan_reporting=/opt/rustwide/target/debug/deps/libcodespan_reporting-6f0df564c27459e8.rmeta --extern gen_macro=/opt/rustwide/target/debug/deps/libgen_macro-35ab8c3c081daf7f.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-8d08fdac2c4c518b.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-701e134f05ff346a.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-e0bf5cddaed6baeb.rmeta --extern rental=/opt/rustwide/target/debug/deps/librental-6c237b58e6dc4ac7.rmeta --extern salsa=/opt/rustwide/target/debug/deps/libsalsa-63611ba9d5cf3061.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-cd82e8959309c5b6.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-487a092e1655f048.rmeta --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-d6d3c0dfd6bc0f6a.rmeta --extern termcolor=/opt/rustwide/target/debug/deps/libtermcolor-3f9ea6130e19bef4.rmeta --extern trybuild=/opt/rustwide/target/debug/deps/libtrybuild-93c8a9bd77615630.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 2 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mosaic` due to 4 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d70a5f14edd523e4664dbd43e9d6f8e8caad444a70dc560e41799525e2cb29bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d70a5f14edd523e4664dbd43e9d6f8e8caad444a70dc560e41799525e2cb29bf", kill_on_drop: false }`
[INFO] [stdout] d70a5f14edd523e4664dbd43e9d6f8e8caad444a70dc560e41799525e2cb29bf