[INFO] updating cached repository nicrgren/rsplacer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nicrgren/rsplacer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nicrgren/rsplacer" "work/ex/beta-1.38-1/sources/1.37.0/gh/nicrgren/rsplacer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/nicrgren/rsplacer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nicrgren/rsplacer" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nicrgren/rsplacer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nicrgren/rsplacer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b05baf5cdba6d29175523f5fe43951aa7c812a93
[INFO] sha for GitHub repo nicrgren/rsplacer: b05baf5cdba6d29175523f5fe43951aa7c812a93
[INFO] validating manifest of nicrgren/rsplacer 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 nicrgren/rsplacer 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 nicrgren/rsplacer
[INFO] finished frobbing nicrgren/rsplacer
[INFO] frobbed toml for nicrgren/rsplacer written to work/ex/beta-1.38-1/sources/1.37.0/gh/nicrgren/rsplacer/Cargo.toml
[INFO] started frobbing nicrgren/rsplacer
[INFO] finished frobbing nicrgren/rsplacer
[INFO] frobbed toml for nicrgren/rsplacer written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nicrgren/rsplacer/Cargo.toml
[INFO] crate nicrgren/rsplacer 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 nicrgren/rsplacer 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nicrgren/rsplacer:/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] ea5e09a0b3e3b751a4f850442658b108f73664281b3342ec6af65abffe5fcec1
[INFO] running `"docker" "start" "-a" "ea5e09a0b3e3b751a4f850442658b108f73664281b3342ec6af65abffe5fcec1"`
[INFO] [stderr]    Compiling atty v0.2.3
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling structopt-derive v0.1.6
[INFO] [stderr]    Compiling backtrace v0.3.4
[INFO] [stderr]    Compiling clap v2.28.0
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling failure v0.1.1
[INFO] [stderr]    Compiling regex v0.2.3
[INFO] [stderr]    Compiling structopt v0.1.6
[INFO] [stderr]    Compiling rsplacer 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:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![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 `rsplacer`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ea5e09a0b3e3b751a4f850442658b108f73664281b3342ec6af65abffe5fcec1"`
[INFO] running `"docker" "rm" "-f" "ea5e09a0b3e3b751a4f850442658b108f73664281b3342ec6af65abffe5fcec1"`
[INFO] [stdout] ea5e09a0b3e3b751a4f850442658b108f73664281b3342ec6af65abffe5fcec1