[INFO] fetching crate include-flate 0.1.3...
[INFO] testing include-flate-0.1.3 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate include-flate 0.1.3 into /workspace/builds/worker-22/source
[INFO] validating manifest of crates.io crate include-flate 0.1.3 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate include-flate 0.1.3
[INFO] finished tweaking crates.io crate include-flate 0.1.3
[INFO] tweaked toml for crates.io crate include-flate 0.1.3 written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "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 include-flate-codegen-exports v0.1.3
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3aea9f87a5058516eff96808f58c657dd38371afb3c9b21c001abb20b7599336
[INFO] running `Command { std: "docker" "start" "-a" "3aea9f87a5058516eff96808f58c657dd38371afb3c9b21c001abb20b7599336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3aea9f87a5058516eff96808f58c657dd38371afb3c9b21c001abb20b7599336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3aea9f87a5058516eff96808f58c657dd38371afb3c9b21c001abb20b7599336", kill_on_drop: false }`
[INFO] [stdout] 3aea9f87a5058516eff96808f58c657dd38371afb3c9b21c001abb20b7599336
[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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9fef6fb30c77127986c4d0c386b8e184d409966ca4784e4b96f97f12100106ac
[INFO] running `Command { std: "docker" "start" "-a" "9fef6fb30c77127986c4d0c386b8e184d409966ca4784e4b96f97f12100106ac", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling rle-decode-fast v1.0.1
[INFO] [stderr]    Compiling libflate v0.1.27
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling include-flate-codegen v0.1.3
[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/include-flate-codegen-0.1.3/src/lib.rs:16:38
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![cfg_attr(not(feature = "stable"), 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 `include-flate-codegen` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "9fef6fb30c77127986c4d0c386b8e184d409966ca4784e4b96f97f12100106ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fef6fb30c77127986c4d0c386b8e184d409966ca4784e4b96f97f12100106ac", kill_on_drop: false }`
[INFO] [stdout] 9fef6fb30c77127986c4d0c386b8e184d409966ca4784e4b96f97f12100106ac