[INFO] updating cached repository pusateri/rupdateproxy
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pusateri/rupdateproxy
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pusateri/rupdateproxy" "work/ex/beta-1.38-1/sources/1.37.0/gh/pusateri/rupdateproxy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/pusateri/rupdateproxy'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pusateri/rupdateproxy" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pusateri/rupdateproxy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pusateri/rupdateproxy'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e10c245345313ab1f273fe941c3f6b7a9bbc7da6
[INFO] sha for GitHub repo pusateri/rupdateproxy: e10c245345313ab1f273fe941c3f6b7a9bbc7da6
[INFO] validating manifest of pusateri/rupdateproxy 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 pusateri/rupdateproxy 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 pusateri/rupdateproxy
[INFO] finished frobbing pusateri/rupdateproxy
[INFO] frobbed toml for pusateri/rupdateproxy written to work/ex/beta-1.38-1/sources/1.37.0/gh/pusateri/rupdateproxy/Cargo.toml
[INFO] started frobbing pusateri/rupdateproxy
[INFO] finished frobbing pusateri/rupdateproxy
[INFO] frobbed toml for pusateri/rupdateproxy written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pusateri/rupdateproxy/Cargo.toml
[INFO] crate pusateri/rupdateproxy 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 pusateri/rupdateproxy 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/pusateri/rupdateproxy:/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] 906d3cd9c17315db20979b18bc1780505544954a09c18916f6142e5e95d5d14b
[INFO] running `"docker" "start" "-a" "906d3cd9c17315db20979b18bc1780505544954a09c18916f6142e5e95d5d14b"`
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling libc v0.2.51 (https://github.com/rust-lang/libc#363ba93a)
[INFO] [stderr]    Compiling spin v0.5.0
[INFO] [stderr]    Compiling nix v0.13.0 (https://github.com/nix-rust/nix.git#179bcb56)
[INFO] [stderr]    Compiling git-version v0.2.1
[INFO] [stderr]    Compiling boxfnonce v0.1.1
[INFO] [stderr]    Compiling treebitmap v0.3.1
[INFO] [stderr]    Compiling ring v0.14.6
[INFO] [stderr]    Compiling crossbeam-channel v0.3.8
[INFO] [stderr]    Compiling socket2 v0.3.8
[INFO] [stderr]    Compiling hostname v0.1.5
[INFO] [stderr]    Compiling ipnetwork v0.14.0
[INFO] [stderr]    Compiling daemonize v0.4.1
[INFO] [stderr]    Compiling rupdateproxy v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]    Compiling mio-extras v2.0.5
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling interface-events v0.1.0 (https://github.com/pusateri/interface-events.git#dd8525d9)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/interface-events-62269f7031a538ff/dd8525d/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(ip)]
[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 `interface-events`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "906d3cd9c17315db20979b18bc1780505544954a09c18916f6142e5e95d5d14b"`
[INFO] running `"docker" "rm" "-f" "906d3cd9c17315db20979b18bc1780505544954a09c18916f6142e5e95d5d14b"`
[INFO] [stdout] 906d3cd9c17315db20979b18bc1780505544954a09c18916f6142e5e95d5d14b