[INFO] updating cached repository Baidicoot/modular_vm
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Baidicoot/modular_vm
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Baidicoot/modular_vm" "work/ex/beta-1.37-6/sources/1.36.0/gh/Baidicoot/modular_vm"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/Baidicoot/modular_vm'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Baidicoot/modular_vm" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Baidicoot/modular_vm"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Baidicoot/modular_vm'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bf5118d6974f55416a92f28f6dacc3b4a67054f1
[INFO] sha for GitHub repo Baidicoot/modular_vm: bf5118d6974f55416a92f28f6dacc3b4a67054f1
[INFO] validating manifest of Baidicoot/modular_vm on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Baidicoot/modular_vm on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Baidicoot/modular_vm
[INFO] finished frobbing Baidicoot/modular_vm
[INFO] frobbed toml for Baidicoot/modular_vm written to work/ex/beta-1.37-6/sources/1.36.0/gh/Baidicoot/modular_vm/Cargo.toml
[INFO] started frobbing Baidicoot/modular_vm
[INFO] finished frobbing Baidicoot/modular_vm
[INFO] frobbed toml for Baidicoot/modular_vm written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Baidicoot/modular_vm/Cargo.toml
[INFO] crate Baidicoot/modular_vm already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Baidicoot/modular_vm against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/Baidicoot/modular_vm:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 3e95d9ed83b8f4d6acb81710ef0dead0fddf4be2b3e6e7d32c34e74f3e48b752
[INFO] running `"docker" "start" "-a" "3e95d9ed83b8f4d6acb81710ef0dead0fddf4be2b3e6e7d32c34e74f3e48b752"`
[INFO] [stderr] warning: unused manifest key: package.categorys
[INFO] [stderr] warning: unused manifest key: package.license_file
[INFO] [stderr]    Compiling modVM v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: crate `modVM` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `mod_vm`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/bin/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_as_u128)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 `modVM`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3e95d9ed83b8f4d6acb81710ef0dead0fddf4be2b3e6e7d32c34e74f3e48b752"`
[INFO] running `"docker" "rm" "-f" "3e95d9ed83b8f4d6acb81710ef0dead0fddf4be2b3e6e7d32c34e74f3e48b752"`
[INFO] [stdout] 3e95d9ed83b8f4d6acb81710ef0dead0fddf4be2b3e6e7d32c34e74f3e48b752