[INFO] fetching crate fmm 0.4.0...
[INFO] testing fmm-0.4.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate fmm 0.4.0 into /workspace/builds/worker-22/source
[INFO] validating manifest of crates.io crate fmm 0.4.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-22/source/rust-toolchain
[INFO] started tweaking crates.io crate fmm 0.4.0
[INFO] finished tweaking crates.io crate fmm 0.4.0
[INFO] tweaked toml for crates.io crate fmm 0.4.0 written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] crate crates.io crate fmm 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "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 serde_with v1.11.0
[INFO] [stderr]   Downloaded compress v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7163d2927c2082896e77614c811da20e3f71b212aa94a4bbd674aa4940d3cd5
[INFO] running `Command { std: "docker" "start" "-a" "d7163d2927c2082896e77614c811da20e3f71b212aa94a4bbd674aa4940d3cd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7163d2927c2082896e77614c811da20e3f71b212aa94a4bbd674aa4940d3cd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7163d2927c2082896e77614c811da20e3f71b212aa94a4bbd674aa4940d3cd5", kill_on_drop: false }`
[INFO] [stdout] d7163d2927c2082896e77614c811da20e3f71b212aa94a4bbd674aa4940d3cd5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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" "RUSTFLAGS=--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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33c6cb15e7bc866b2cbd59f9b67edaf3beed29688d424c7520767ceff0643c10
[INFO] running `Command { std: "docker" "start" "-a" "33c6cb15e7bc866b2cbd59f9b67edaf3beed29688d424c7520767ceff0643c10", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling libc v0.2.106
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling cc v1.0.71
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling rustversion v1.0.5
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling anyhow v1.0.45
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling json v0.12.4
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.3.3
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling bzip2-sys v0.1.11+1.0.8
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling dirs-sys v0.3.6
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling directories v3.0.2
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling flate2 v1.0.22
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling num-complex v0.3.1
[INFO] [stderr]    Compiling bzip2 v0.4.3
[INFO] [stderr]    Compiling num v0.3.1
[INFO] [stderr]    Compiling compress v0.2.1
[INFO] [stderr]    Compiling darling_core v0.13.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling darling_macro v0.13.0
[INFO] [stderr]    Compiling darling v0.13.0
[INFO] [stderr]    Compiling structopt v0.3.25
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling serde_with_macros v1.5.1
[INFO] [stderr]    Compiling zip v0.5.13
[INFO] [stderr]    Compiling serde_with v1.11.0
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling fmm v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(iter_intersperse)]
[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 `fmm` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "33c6cb15e7bc866b2cbd59f9b67edaf3beed29688d424c7520767ceff0643c10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33c6cb15e7bc866b2cbd59f9b67edaf3beed29688d424c7520767ceff0643c10", kill_on_drop: false }`
[INFO] [stdout] 33c6cb15e7bc866b2cbd59f9b67edaf3beed29688d424c7520767ceff0643c10