[INFO] updating cached repository porglezomp/hyalite
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/porglezomp/hyalite
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/porglezomp/hyalite" "work/ex/beta-1.38-1/sources/1.37.0/gh/porglezomp/hyalite"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/porglezomp/hyalite'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/porglezomp/hyalite" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/porglezomp/hyalite"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/porglezomp/hyalite'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b575d2bc86ca971bace24828a6da6b299660ed7
[INFO] sha for GitHub repo porglezomp/hyalite: 3b575d2bc86ca971bace24828a6da6b299660ed7
[INFO] validating manifest of porglezomp/hyalite on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of porglezomp/hyalite on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing porglezomp/hyalite
[INFO] finished frobbing porglezomp/hyalite
[INFO] frobbed toml for porglezomp/hyalite written to work/ex/beta-1.38-1/sources/1.37.0/gh/porglezomp/hyalite/Cargo.toml
[INFO] started frobbing porglezomp/hyalite
[INFO] finished frobbing porglezomp/hyalite
[INFO] frobbed toml for porglezomp/hyalite written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/porglezomp/hyalite/Cargo.toml
[INFO] crate porglezomp/hyalite already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing porglezomp/hyalite against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/porglezomp/hyalite:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 7bff32c53a955720e8570b48144c22d269f8eccd42f64ad6e3217023450259eb
[INFO] running `"docker" "start" "-a" "7bff32c53a955720e8570b48144c22d269f8eccd42f64ad6e3217023450259eb"`
[INFO] [stderr]    Compiling z3-sys v0.4.0 (https://github.com/prove-rs/z3.rs.git#76460488)
[INFO] [stderr]    Compiling z3 v0.3.2 (https://github.com/prove-rs/z3.rs.git#76460488)
[INFO] [stderr]    Compiling symex v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slice_patterns)]
[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 `symex`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7bff32c53a955720e8570b48144c22d269f8eccd42f64ad6e3217023450259eb"`
[INFO] running `"docker" "rm" "-f" "7bff32c53a955720e8570b48144c22d269f8eccd42f64ad6e3217023450259eb"`
[INFO] [stdout] 7bff32c53a955720e8570b48144c22d269f8eccd42f64ad6e3217023450259eb