[INFO] updating cached repository obshidian/juRSh
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/obshidian/juRSh
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/obshidian/juRSh" "work/ex/beta-1.37-6/sources/1.36.0/gh/obshidian/juRSh"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/obshidian/juRSh'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/obshidian/juRSh" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/obshidian/juRSh"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/obshidian/juRSh'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 64bf2538ad8cabdc248cc02c67ee08ab3ab45186
[INFO] sha for GitHub repo obshidian/juRSh: 64bf2538ad8cabdc248cc02c67ee08ab3ab45186
[INFO] validating manifest of obshidian/juRSh 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 obshidian/juRSh 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 obshidian/juRSh
[INFO] finished frobbing obshidian/juRSh
[INFO] frobbed toml for obshidian/juRSh written to work/ex/beta-1.37-6/sources/1.36.0/gh/obshidian/juRSh/Cargo.toml
[INFO] started frobbing obshidian/juRSh
[INFO] finished frobbing obshidian/juRSh
[INFO] frobbed toml for obshidian/juRSh written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/obshidian/juRSh/Cargo.toml
[INFO] crate obshidian/juRSh 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 obshidian/juRSh against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/obshidian/juRSh:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 9bad0e2ce12fe269877db55627e2338ec31d8dbb9a643c062c98e2baadc05203
[INFO] running `"docker" "start" "-a" "9bad0e2ce12fe269877db55627e2338ec31d8dbb9a643c062c98e2baadc05203"`
[INFO] [stderr]    Compiling joshscript-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(no_panic_pow)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::num::Wrapping`
[INFO] [stderr]  --> src/exec.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::num::Wrapping;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] 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 `joshscript-rs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9bad0e2ce12fe269877db55627e2338ec31d8dbb9a643c062c98e2baadc05203"`
[INFO] running `"docker" "rm" "-f" "9bad0e2ce12fe269877db55627e2338ec31d8dbb9a643c062c98e2baadc05203"`
[INFO] [stdout] 9bad0e2ce12fe269877db55627e2338ec31d8dbb9a643c062c98e2baadc05203