[INFO] crate codgenhelp 0.0.1 is already in cache
[INFO] testing codgenhelp-0.0.1 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate codgenhelp 0.0.1 into work/builds/worker-1/source
[INFO] validating manifest of crates.io crate codgenhelp 0.0.1 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate codgenhelp 0.0.1
[INFO] finished tweaking crates.io crate codgenhelp 0.0.1
[INFO] tweaked toml for crates.io crate codgenhelp 0.0.1 written to work/builds/worker-1/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] c3ef966c0a03e3453567b59de2e50af6e6faf22901bb9a0456a152e05a53dec4
[INFO] running `"docker" "start" "-a" "c3ef966c0a03e3453567b59de2e50af6e6faf22901bb9a0456a152e05a53dec4"`
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling codgenhelp v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | #![feature(proc_macro, proc_macro_lib)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]   --> src/lib.rs:81:47
[INFO] [stderr]    |
[INFO] [stderr] 81 |         let mut ret_val: MacroInput = unsafe{ mem::uninitialized() };
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `codgenhelp`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c3ef966c0a03e3453567b59de2e50af6e6faf22901bb9a0456a152e05a53dec4"`
[INFO] running `"docker" "rm" "-f" "c3ef966c0a03e3453567b59de2e50af6e6faf22901bb9a0456a152e05a53dec4"`
[INFO] [stdout] c3ef966c0a03e3453567b59de2e50af6e6faf22901bb9a0456a152e05a53dec4