[INFO] fetching crate variyak 0.2.0...
[INFO] testing variyak-0.2.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate variyak 0.2.0 into /workspace/builds/worker-89/source
[INFO] validating manifest of crates.io crate variyak 0.2.0 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 variyak 0.2.0
[INFO] finished tweaking crates.io crate variyak 0.2.0
[INFO] tweaked toml for crates.io crate variyak 0.2.0 written to /workspace/builds/worker-89/source/Cargo.toml
[INFO] crate crates.io crate variyak 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded seq-macro v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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] 02f53347f94a2cfa21318f3e94709d55f67f75cf49f8091d54399bef0aa31571
[INFO] running `Command { std: "docker" "start" "-a" "02f53347f94a2cfa21318f3e94709d55f67f75cf49f8091d54399bef0aa31571", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02f53347f94a2cfa21318f3e94709d55f67f75cf49f8091d54399bef0aa31571", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02f53347f94a2cfa21318f3e94709d55f67f75cf49f8091d54399bef0aa31571", kill_on_drop: false }`
[INFO] [stdout] 02f53347f94a2cfa21318f3e94709d55f67f75cf49f8091d54399bef0aa31571
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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] be0fa7e3724484c3168fdae94c3e1500c87729e68c3e12e70e79a623281da3cc
[INFO] running `Command { std: "docker" "start" "-a" "be0fa7e3724484c3168fdae94c3e1500c87729e68c3e12e70e79a623281da3cc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling seq-macro v0.2.1
[INFO] [stderr]    Compiling variyak v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.73s
[INFO] running `Command { std: "docker" "inspect" "be0fa7e3724484c3168fdae94c3e1500c87729e68c3e12e70e79a623281da3cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be0fa7e3724484c3168fdae94c3e1500c87729e68c3e12e70e79a623281da3cc", kill_on_drop: false }`
[INFO] [stdout] be0fa7e3724484c3168fdae94c3e1500c87729e68c3e12e70e79a623281da3cc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-89/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" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f59baa3d9fa78b1a924bde4bd985eae5db40bf818ba5a02b2d25b44334056a10
[INFO] running `Command { std: "docker" "start" "-a" "f59baa3d9fa78b1a924bde4bd985eae5db40bf818ba5a02b2d25b44334056a10", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]    Compiling variyak v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> examples/libc_printf.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(c_variadic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> examples/c_variadic.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(c_variadic)]
[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 `variyak` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "f59baa3d9fa78b1a924bde4bd985eae5db40bf818ba5a02b2d25b44334056a10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f59baa3d9fa78b1a924bde4bd985eae5db40bf818ba5a02b2d25b44334056a10", kill_on_drop: false }`
[INFO] [stdout] f59baa3d9fa78b1a924bde4bd985eae5db40bf818ba5a02b2d25b44334056a10