[INFO] fetching crate mdbx 0.0.6...
[INFO] documenting mdbx-0.0.6 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate mdbx 0.0.6 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mdbx 0.0.6 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdbx 0.0.6
[INFO] finished tweaking crates.io crate mdbx 0.0.6
[INFO] tweaked toml for crates.io crate mdbx 0.0.6 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate mdbx 0.0.6 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96946acd8d4df145bda977b6bd2b9b77c4ca51efb1e609894ab248c47e111c26
[INFO] running `Command { std: "docker" "start" "-a" "96946acd8d4df145bda977b6bd2b9b77c4ca51efb1e609894ab248c47e111c26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96946acd8d4df145bda977b6bd2b9b77c4ca51efb1e609894ab248c47e111c26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96946acd8d4df145bda977b6bd2b9b77c4ca51efb1e609894ab248c47e111c26", kill_on_drop: false }`
[INFO] [stdout] 96946acd8d4df145bda977b6bd2b9b77c4ca51efb1e609894ab248c47e111c26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53b085cddcd7838e377cac9f95f90590d5185180f8debecf4e1c4171b038952e
[INFO] running `Command { std: "docker" "start" "-a" "53b085cddcd7838e377cac9f95f90590d5185180f8debecf4e1c4171b038952e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling bindgen v0.59.2
[INFO] [stderr]    Compiling shlex v1.1.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling peeking_take_while v0.1.2
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling mdbx v0.0.6 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling paste v1.0.6
[INFO] [stderr]    Compiling mdbx-proc v0.1.1
[INFO] [stderr]    Compiling nom v7.1.0
[INFO] [stderr]    Compiling libloading v0.7.2
[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/mdbx-proc-0.1.1/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 `mdbx-proc` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "53b085cddcd7838e377cac9f95f90590d5185180f8debecf4e1c4171b038952e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53b085cddcd7838e377cac9f95f90590d5185180f8debecf4e1c4171b038952e", kill_on_drop: false }`
[INFO] [stdout] 53b085cddcd7838e377cac9f95f90590d5185180f8debecf4e1c4171b038952e