[INFO] cloning repository https://github.com/iliakonnov/awsync
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iliakonnov/awsync" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filiakonnov%2Fawsync", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filiakonnov%2Fawsync'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b93efa3caa7d2a88805faf2c1416a281563e3576
[INFO] documenting iliakonnov/awsync against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filiakonnov%2Fawsync" "/workspace/builds/worker-18/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-18/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iliakonnov/awsync 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 git repo https://github.com/iliakonnov/awsync
[INFO] finished tweaking git repo https://github.com/iliakonnov/awsync
[INFO] tweaked toml for git repo https://github.com/iliakonnov/awsync written to /workspace/builds/worker-18/source/Cargo.toml
[INFO] crate git repo https://github.com/iliakonnov/awsync already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded uuid v0.8.2
[INFO] [stderr]   Downloaded ansi_term v0.12.1
[INFO] [stderr]   Downloaded object v0.27.1
[INFO] [stderr]   Downloaded crypto-common v0.1.1
[INFO] [stderr]   Downloaded futures v0.3.19
[INFO] [stderr]   Downloaded fs2 v0.4.3
[INFO] [stderr]   Downloaded futures-executor v0.3.19
[INFO] [stderr]   Downloaded futures-io v0.3.19
[INFO] [stderr]   Downloaded futures-macro v0.3.19
[INFO] [stderr]   Downloaded futures-core v0.3.19
[INFO] [stderr]   Downloaded futures-channel v0.3.19
[INFO] [stderr]   Downloaded futures-util v0.3.19
[INFO] [stderr]   Downloaded rusqlite v0.26.3
[INFO] [stderr]   Downloaded itoa v1.0.1
[INFO] [stderr]   Downloaded hex-literal v0.3.4
[INFO] [stderr]   Downloaded os_str_bytes v6.0.0
[INFO] [stderr]   Downloaded once_cell v1.9.0
[INFO] [stderr]   Downloaded ahash v0.7.6
[INFO] [stderr]   Downloaded vcpkg v0.2.15
[INFO] [stderr]   Downloaded hashlink v0.7.0
[INFO] [stderr]   Downloaded addr2line v0.17.0
[INFO] [stderr]   Downloaded backtrace v0.3.63
[INFO] [stderr]   Downloaded block-buffer v0.10.0
[INFO] [stderr]   Downloaded miniz_oxide v0.4.4
[INFO] [stderr]   Downloaded clap v2.34.0
[INFO] [stderr]   Downloaded sha2 v0.10.0
[INFO] [stderr]   Downloaded adler v1.0.2
[INFO] [stderr]   Downloaded tokio v1.15.0
[INFO] [stderr]   Downloaded gimli v0.26.1
[INFO] [stderr]   Downloaded vec_map v0.8.2
[INFO] [stderr]   Downloaded snafu-derive v0.6.10
[INFO] [stderr]   Downloaded serde_derive v1.0.132
[INFO] [stderr]   Downloaded libsqlite3-sys v0.23.2
[INFO] [stderr]   Downloaded ryu v1.0.9
[INFO] [stderr]   Downloaded snafu v0.6.10
[INFO] [stderr]   Downloaded structopt-derive v0.4.18
[INFO] [stderr]   Downloaded structopt v0.3.25
[INFO] [stderr]   Downloaded time-macros v0.2.3
[INFO] [stderr]   Downloaded time v0.3.5
[INFO] [stderr]   Downloaded futures-sink v0.3.19
[INFO] [stderr]   Downloaded futures-task v0.3.19
[INFO] [stderr]   Downloaded serde_json v1.0.73
[INFO] [stderr]   Downloaded digest v0.10.1
[INFO] [stderr]   Downloaded rustc-demangle v0.1.21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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] d4554b289199ed9588165403c2aca93415407c3277ba58c47beccaa0b9f01397
[INFO] running `Command { std: "docker" "start" "-a" "d4554b289199ed9588165403c2aca93415407c3277ba58c47beccaa0b9f01397", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4554b289199ed9588165403c2aca93415407c3277ba58c47beccaa0b9f01397", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4554b289199ed9588165403c2aca93415407c3277ba58c47beccaa0b9f01397", kill_on_drop: false }`
[INFO] [stdout] d4554b289199ed9588165403c2aca93415407c3277ba58c47beccaa0b9f01397
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-18/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] 6849c92faf3e1d1476445dde20ccd0c0eceaa6d791f1506629d0afda24b48518
[INFO] running `Command { std: "docker" "start" "-a" "6849c92faf3e1d1476445dde20ccd0c0eceaa6d791f1506629d0afda24b48518", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling futures-task v0.3.19
[INFO] [stderr]    Compiling serde_derive v1.0.132
[INFO] [stderr]    Compiling futures-channel v0.3.19
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking futures-sink v0.3.19
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling serde v1.0.132
[INFO] [stderr]    Compiling futures-util v0.3.19
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]     Checking once_cell v1.9.0
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking futures-io v0.3.19
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling serde_json v1.0.73
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking itoa v1.0.1
[INFO] [stderr]     Checking fallible-streaming-iterator v0.1.9
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking cpufeatures v0.2.1
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]    Compiling time-macros v0.2.3
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]    Compiling libsqlite3-sys v0.23.2
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling backtrace v0.3.63
[INFO] [stderr]     Checking object v0.27.1
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking crypto-common v0.1.1
[INFO] [stderr]     Checking block-buffer v0.10.0
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking digest v0.10.1
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking sha2 v0.10.0
[INFO] [stderr]     Checking hashlink v0.7.0
[INFO] [stderr]     Checking rusqlite v0.26.3
[INFO] [stderr]    Compiling futures-macro v0.3.19
[INFO] [stderr]    Compiling snafu-derive v0.6.10
[INFO] [stderr]    Compiling tokio-macros v1.7.0
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking tokio v1.15.0
[INFO] [stderr]     Checking futures-executor v0.3.19
[INFO] [stderr]     Checking futures v0.3.19
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking snafu v0.6.10
[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/snafu-0.6.10/src/lib.rs:3:63
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![cfg_attr(feature = "unstable-backtraces-impl-std", feature(backtrace))]
[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 `snafu` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "6849c92faf3e1d1476445dde20ccd0c0eceaa6d791f1506629d0afda24b48518", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6849c92faf3e1d1476445dde20ccd0c0eceaa6d791f1506629d0afda24b48518", kill_on_drop: false }`
[INFO] [stdout] 6849c92faf3e1d1476445dde20ccd0c0eceaa6d791f1506629d0afda24b48518