[INFO] fetching crate caller_modpath 0.1.1...
[INFO] documenting caller_modpath-0.1.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate caller_modpath 0.1.1 into /workspace/builds/worker-94/source
[INFO] validating manifest of crates.io crate caller_modpath 0.1.1 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate caller_modpath 0.1.1
[INFO] finished tweaking crates.io crate caller_modpath 0.1.1
[INFO] tweaked toml for crates.io crate caller_modpath 0.1.1 written to /workspace/builds/worker-94/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded caller_modpath_macros v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6f376cc3387f9fe8fac925f5ed64c5fc089fb8c41e3fe821cfbaff8bebcb7309
[INFO] running `Command { std: "docker" "start" "-a" "6f376cc3387f9fe8fac925f5ed64c5fc089fb8c41e3fe821cfbaff8bebcb7309", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6f376cc3387f9fe8fac925f5ed64c5fc089fb8c41e3fe821cfbaff8bebcb7309", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f376cc3387f9fe8fac925f5ed64c5fc089fb8c41e3fe821cfbaff8bebcb7309", kill_on_drop: false }`
[INFO] [stdout] 6f376cc3387f9fe8fac925f5ed64c5fc089fb8c41e3fe821cfbaff8bebcb7309
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af664be53885258319dd94c9a42e3c44be4484025379e465dd59fb12fe7d4f10
[INFO] running `Command { std: "docker" "start" "-a" "af664be53885258319dd94c9a42e3c44be4484025379e465dd59fb12fe7d4f10", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling caller_modpath_macros v0.1.1
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]     Checking serde v1.0.127
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking proc-macro2 v1.0.28
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking cargo-manifest v0.2.4
[INFO] [stderr]  Documenting caller_modpath v0.1.1 (/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_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `caller_modpath`
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name caller_modpath src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern caller_modpath_macros=/opt/rustwide/target/debug/deps/libcaller_modpath_macros-0d91ad0696b2ec11.so --extern cargo_manifest=/opt/rustwide/target/debug/deps/libcargo_manifest-5ca3e495f0ae825e.rmeta --extern glob=/opt/rustwide/target/debug/deps/libglob-029696837cd6fb58.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-c395b40247ac8d91.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-901816f2d165e43f.rmeta --extern uuid=/opt/rustwide/target/debug/deps/libuuid-166feaf0f778b0d0.rmeta --cap-lints=warn --crate-version 0.1.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "af664be53885258319dd94c9a42e3c44be4484025379e465dd59fb12fe7d4f10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af664be53885258319dd94c9a42e3c44be4484025379e465dd59fb12fe7d4f10", kill_on_drop: false }`
[INFO] [stdout] af664be53885258319dd94c9a42e3c44be4484025379e465dd59fb12fe7d4f10
