[INFO] fetching crate modus_ponens_derive 0.1.2...
[INFO] testing modus_ponens_derive-0.1.2 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate modus_ponens_derive 0.1.2 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate modus_ponens_derive 0.1.2 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 modus_ponens_derive 0.1.2
[INFO] finished tweaking crates.io crate modus_ponens_derive 0.1.2
[INFO] tweaked toml for crates.io crate modus_ponens_derive 0.1.2 written to /workspace/builds/worker-8/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded modus_ponens v0.11.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 37f0813f6d572bef117520c725cfe8feeebedf6f62df62a76b2094bae8394a36
[INFO] running `Command { std: "docker" "start" "-a" "37f0813f6d572bef117520c725cfe8feeebedf6f62df62a76b2094bae8394a36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37f0813f6d572bef117520c725cfe8feeebedf6f62df62a76b2094bae8394a36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37f0813f6d572bef117520c725cfe8feeebedf6f62df62a76b2094bae8394a36", kill_on_drop: false }`
[INFO] [stdout] 37f0813f6d572bef117520c725cfe8feeebedf6f62df62a76b2094bae8394a36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9208076f82bb2bc3d88f90f6de3d2aaaf5299a7e645685fbb02aae5409310f6
[INFO] running `Command { std: "docker" "start" "-a" "d9208076f82bb2bc3d88f90f6de3d2aaaf5299a7e645685fbb02aae5409310f6", kill_on_drop: false }`
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling modus_ponens v0.11.4
[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/modus_ponens-0.11.4/src/lib.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | #![feature(hash_set_entry)]
[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 `modus_ponens` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d9208076f82bb2bc3d88f90f6de3d2aaaf5299a7e645685fbb02aae5409310f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9208076f82bb2bc3d88f90f6de3d2aaaf5299a7e645685fbb02aae5409310f6", kill_on_drop: false }`
[INFO] [stdout] d9208076f82bb2bc3d88f90f6de3d2aaaf5299a7e645685fbb02aae5409310f6
