[INFO] updating cached repository ARwMq9b6/qrs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ARwMq9b6/qrs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ARwMq9b6/qrs" "work/ex/beta-1.37-6/sources/1.36.0/gh/ARwMq9b6/qrs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/ARwMq9b6/qrs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ARwMq9b6/qrs" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ARwMq9b6/qrs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ARwMq9b6/qrs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 13f6f5a6eed4bcbb5ad91393e02522c5a19fd789
[INFO] sha for GitHub repo ARwMq9b6/qrs: 13f6f5a6eed4bcbb5ad91393e02522c5a19fd789
[INFO] validating manifest of ARwMq9b6/qrs 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 ARwMq9b6/qrs 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 ARwMq9b6/qrs
[INFO] finished frobbing ARwMq9b6/qrs
[INFO] frobbed toml for ARwMq9b6/qrs written to work/ex/beta-1.37-6/sources/1.36.0/gh/ARwMq9b6/qrs/Cargo.toml
[INFO] started frobbing ARwMq9b6/qrs
[INFO] finished frobbing ARwMq9b6/qrs
[INFO] frobbed toml for ARwMq9b6/qrs written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/ARwMq9b6/qrs/Cargo.toml
[INFO] crate ARwMq9b6/qrs 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 ARwMq9b6/qrs 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-0/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/ARwMq9b6/qrs:/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] 317fbb23daa1534ec68643a914fe6fffead81eb886b27e00ee791530b895c439
[INFO] running `"docker" "start" "-a" "317fbb23daa1534ec68643a914fe6fffead81eb886b27e00ee791530b895c439"`
[INFO] [stderr]    Compiling state v0.2.0
[INFO] [stderr]    Compiling c_linked_list v1.1.0
[INFO] [stderr]    Compiling vec_map v0.7.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.10
[INFO] [stderr]    Compiling atty v0.2.2
[INFO] [stderr]    Compiling term_size v0.2.3
[INFO] [stderr]    Compiling rocket v0.2.4
[INFO] [stderr]    Compiling deflate v0.7.5
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/state-0.2.0/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(const_fn)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling rocket_codegen v0.2.4
[INFO] [stderr]    Compiling term-painter v0.2.3
[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 `state`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "317fbb23daa1534ec68643a914fe6fffead81eb886b27e00ee791530b895c439"`
[INFO] running `"docker" "rm" "-f" "317fbb23daa1534ec68643a914fe6fffead81eb886b27e00ee791530b895c439"`
[INFO] [stdout] 317fbb23daa1534ec68643a914fe6fffead81eb886b27e00ee791530b895c439