[INFO] fetching crate get_len_base_10_as_usize 0.1.6...
[INFO] documenting get_len_base_10_as_usize-0.1.6 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate get_len_base_10_as_usize 0.1.6 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate get_len_base_10_as_usize 0.1.6 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 get_len_base_10_as_usize 0.1.6
[INFO] finished tweaking crates.io crate get_len_base_10_as_usize 0.1.6
[INFO] tweaked toml for crates.io crate get_len_base_10_as_usize 0.1.6 written to /workspace/builds/worker-15/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded take-until v0.1.0
[INFO] [stderr]   Downloaded dd_maths_traits_macros v0.1.0
[INFO] [stderr]   Downloaded dd_maths_traits v0.1.8
[INFO] [stderr]   Downloaded min_max_traits v0.1.0
[INFO] [stderr]   Downloaded include_display_mode_tex v0.1.2
[INFO] [stderr]   Downloaded zero_based_index v0.1.1
[INFO] [stderr]   Downloaded get_len_base_10_as_usize_macros v0.1.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 105f0509f88daf7aac4f9c5909e7173ae118b9bd87d90577ae32ff2e0d725b95
[INFO] running `Command { std: "docker" "start" "-a" "105f0509f88daf7aac4f9c5909e7173ae118b9bd87d90577ae32ff2e0d725b95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "105f0509f88daf7aac4f9c5909e7173ae118b9bd87d90577ae32ff2e0d725b95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "105f0509f88daf7aac4f9c5909e7173ae118b9bd87d90577ae32ff2e0d725b95", kill_on_drop: false }`
[INFO] [stdout] 105f0509f88daf7aac4f9c5909e7173ae118b9bd87d90577ae32ff2e0d725b95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] d3fd195a350896765f6734c3c87682e079d795d0793e0c71cea5c3fce5901b6e
[INFO] running `Command { std: "docker" "start" "-a" "d3fd195a350896765f6734c3c87682e079d795d0793e0c71cea5c3fce5901b6e", kill_on_drop: false }`
[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 epui v0.1.1
[INFO] [stderr]    Compiling epsi v0.1.1
[INFO] [stderr]    Compiling primitive_promotion v0.1.4
[INFO] [stderr]    Compiling relative-path v1.7.0
[INFO] [stderr]    Compiling max_len_base_10_as_usize v0.1.0
[INFO] [stderr]    Compiling is_signed_trait v0.1.0
[INFO] [stderr]     Checking take-until v0.1.0
[INFO] [stderr]     Checking min_max_traits v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling midpoint v0.1.5
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling dd_maths_traits_macros v0.1.0
[INFO] [stderr]     Checking dd_maths_traits v0.1.8
[INFO] [stderr]    Compiling include_display_mode_tex v0.1.2
[INFO] [stderr]    Compiling get_len_base_10_as_usize_macros v0.1.9
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/include_display_mode_tex-0.1.2/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_span)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[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 compile `include_display_mode_tex` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d3fd195a350896765f6734c3c87682e079d795d0793e0c71cea5c3fce5901b6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3fd195a350896765f6734c3c87682e079d795d0793e0c71cea5c3fce5901b6e", kill_on_drop: false }`
[INFO] [stdout] d3fd195a350896765f6734c3c87682e079d795d0793e0c71cea5c3fce5901b6e