[INFO] fetching crate zss 1.0.1...
[INFO] documenting zss-1.0.1 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate zss 1.0.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate zss 1.0.1 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zss 1.0.1
[INFO] finished tweaking crates.io crate zss 1.0.1
[INFO] tweaked toml for crates.io crate zss 1.0.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate zss 1.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simplelog v0.10.0
[INFO] [stderr]   Downloaded x11 v2.18.2
[INFO] [stderr]   Downloaded glium v0.30.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1831026d85c6eec1d03bc6b8aa15aaf7ca47cd17070af96250f9c7357f2a25ad
[INFO] running `Command { std: "docker" "start" "-a" "1831026d85c6eec1d03bc6b8aa15aaf7ca47cd17070af96250f9c7357f2a25ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1831026d85c6eec1d03bc6b8aa15aaf7ca47cd17070af96250f9c7357f2a25ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1831026d85c6eec1d03bc6b8aa15aaf7ca47cd17070af96250f9c7357f2a25ad", kill_on_drop: false }`
[INFO] [stdout] 1831026d85c6eec1d03bc6b8aa15aaf7ca47cd17070af96250f9c7357f2a25ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4e2550199b59bbdfbebc2002d84201effa8923cb23ef423d3e5fb5a9225f4c6
[INFO] running `Command { std: "docker" "start" "-a" "b4e2550199b59bbdfbebc2002d84201effa8923cb23ef423d3e5fb5a9225f4c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling khronos_api v3.1.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]    Compiling xml-rs v0.8.3
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking weezl v0.1.5
[INFO] [stderr]     Checking gimli v0.24.0
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling x11 v2.18.2
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking miniz_oxide v0.3.7
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling backtrace v0.3.59
[INFO] [stderr]     Checking rustc-demangle v0.1.20
[INFO] [stderr]     Checking object v0.24.0
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stderr]     Checking gif v0.11.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling glium v0.30.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking bytemuck v1.7.0
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking addr2line v0.15.2
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking takeable-option v0.5.0
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking simplelog v0.10.0
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]  Documenting zss v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(format_args_capture, try_blocks, drain_filter)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `format_args_capture` has been stable since `1.58.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `zss`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2018 --crate-type bin --crate-name zss src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=52fefb1c8c707b4c -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-7da11c2a82e722d1.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-f7a38ee2f07f1fd8.rmeta --extern glium=/opt/rustwide/target/debug/deps/libglium-5e35cd45c2d9badc.rmeta --extern image=/opt/rustwide/target/debug/deps/libimage-c6c977656e4768d0.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f0223f3a435bc936.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-d209648ce0d5a4c8.rmeta --extern simplelog=/opt/rustwide/target/debug/deps/libsimplelog-a9f5bfccb0d10245.rmeta --extern x11=/opt/rustwide/target/debug/deps/libx11-29e428178b9e08a1.rmeta --cap-lints=warn --crate-version 1.0.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "b4e2550199b59bbdfbebc2002d84201effa8923cb23ef423d3e5fb5a9225f4c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4e2550199b59bbdfbebc2002d84201effa8923cb23ef423d3e5fb5a9225f4c6", kill_on_drop: false }`
[INFO] [stdout] b4e2550199b59bbdfbebc2002d84201effa8923cb23ef423d3e5fb5a9225f4c6
