[INFO] cloning repository https://github.com/mashedcode/proc-macro2-whitespace
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mashedcode/proc-macro2-whitespace" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmashedcode%2Fproc-macro2-whitespace", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmashedcode%2Fproc-macro2-whitespace'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f934294f40fe4e749077e2e14d8731b1f05f60e
[INFO] documenting mashedcode/proc-macro2-whitespace against beta-2020-10-09 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmashedcode%2Fproc-macro2-whitespace" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mashedcode/proc-macro2-whitespace on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mashedcode/proc-macro2-whitespace
[INFO] finished tweaking git repo https://github.com/mashedcode/proc-macro2-whitespace
[INFO] tweaked toml for git repo https://github.com/mashedcode/proc-macro2-whitespace written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/mashedcode/proc-macro2-whitespace already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang/rustfmt`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded termize v0.1.1
[INFO] [stderr]   Downloaded dunce v1.0.1
[INFO] [stderr]   Downloaded rustc-rayon-core v0.3.0
[INFO] [stderr]   Downloaded measureme v0.7.1
[INFO] [stderr]   Downloaded rustc-ap-rustc_arena v671.0.0
[INFO] [stderr]   Downloaded rustc-rayon v0.3.0
[INFO] [stderr]   Downloaded psm v0.1.11
[INFO] [stderr]   Downloaded rustc-ap-rustc_lexer v671.0.0
[INFO] [stderr]   Downloaded yansi-term v0.1.2
[INFO] [stderr]   Downloaded annotate-snippets v0.8.0
[INFO] [stderr]   Downloaded stacker v0.1.11
[INFO] [stderr]   Downloaded rustc-ap-rustc_macros v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_graphviz v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_attr v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_index v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_errors v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_pretty v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_serialize v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_feature v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast_passes v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_ast v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_span v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_session v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_target v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_fs_util v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_data_structures v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_expand v671.0.0
[INFO] [stderr]   Downloaded rustc-ap-rustc_parse v671.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78fd8808f936fe18b7cf7c50a9a415532124ad1e00e260d699461e942284c444
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "78fd8808f936fe18b7cf7c50a9a415532124ad1e00e260d699461e942284c444", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78fd8808f936fe18b7cf7c50a9a415532124ad1e00e260d699461e942284c444", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78fd8808f936fe18b7cf7c50a9a415532124ad1e00e260d699461e942284c444", kill_on_drop: false }`
[INFO] [stdout] 78fd8808f936fe18b7cf7c50a9a415532124ad1e00e260d699461e942284c444
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73cbfe01886a877708d891afa2a3f8dcb6177c5e76572058e7680e91db5d1a06
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "73cbfe01886a877708d891afa2a3f8dcb6177c5e76572058e7680e91db5d1a06", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]     Checking smallvec v1.4.2
[INFO] [stderr]    Compiling rustc-rayon-core v0.3.0
[INFO] [stderr]     Checking rustc-ap-rustc_graphviz v671.0.0
[INFO] [stderr]     Checking yansi-term v0.1.2
[INFO] [stderr]     Checking rustc-ap-rustc_fs_util v671.0.0
[INFO] [stderr]     Checking version_check v0.9.2
[INFO] [stderr]    Compiling rustfmt-nightly v2.0.0-rc.2 (https://github.com/rust-lang/rustfmt#218593f2)
[INFO] [stderr]     Checking rustc-workspace-hack v1.0.0
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]     Checking dunce v1.0.1
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]    Compiling psm v0.1.11
[INFO] [stderr]    Compiling stacker v0.1.11
[INFO] [stderr]     Checking rustc-ap-rustc_lexer v671.0.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-1.4.2/src/lib.rs:74:32
[INFO] [stdout]    |
[INFO] [stdout] 74 | #![cfg_attr(feature = "union", feature(untagged_unions))]
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/smallvec-1.4.2/src/lib.rs:77:37
[INFO] [stdout]    |
[INFO] [stdout] 77 | #![cfg_attr(feature = "may_dangle", feature(dropck_eyepatch))]
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-ap-rustc_graphviz-671.0.0/lib.rs:278:1
[INFO] [stdout]     |
[INFO] [stdout] 278 | #![feature(rustc_private, nll)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/lock_api-0.3.4/src/lib.rs:91:34
[INFO] [stdout]    |
[INFO] [stdout] 91 | #![cfg_attr(feature = "nightly", feature(const_fn))]
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking jobserver v0.1.21
[INFO] [stderr]     Checking termize v0.1.1
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking ena v0.14.0
[INFO] [stdout] error: aborting due to previous error
[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] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustc-ap-rustc_graphviz`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "73cbfe01886a877708d891afa2a3f8dcb6177c5e76572058e7680e91db5d1a06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73cbfe01886a877708d891afa2a3f8dcb6177c5e76572058e7680e91db5d1a06", kill_on_drop: false }`
[INFO] [stdout] 73cbfe01886a877708d891afa2a3f8dcb6177c5e76572058e7680e91db5d1a06
