[INFO] updating cached repository pfpacket/rust-9p
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pfpacket/rust-9p
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pfpacket/rust-9p" "work/ex/beta-1.37-6/sources/1.36.0/gh/pfpacket/rust-9p"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/pfpacket/rust-9p'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pfpacket/rust-9p" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pfpacket/rust-9p"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pfpacket/rust-9p'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 01cf9c60bff0f35567d876db7be7fb86032b44eb
[INFO] sha for GitHub repo pfpacket/rust-9p: 01cf9c60bff0f35567d876db7be7fb86032b44eb
[INFO] validating manifest of pfpacket/rust-9p 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 pfpacket/rust-9p 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 pfpacket/rust-9p
[INFO] finished frobbing pfpacket/rust-9p
[INFO] frobbed toml for pfpacket/rust-9p written to work/ex/beta-1.37-6/sources/1.36.0/gh/pfpacket/rust-9p/Cargo.toml
[INFO] started frobbing pfpacket/rust-9p
[INFO] finished frobbing pfpacket/rust-9p
[INFO] frobbed toml for pfpacket/rust-9p written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pfpacket/rust-9p/Cargo.toml
[INFO] crate pfpacket/rust-9p 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 pfpacket/rust-9p against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pfpacket/rust-9p:/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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 7c37f953e00a42a42491eefc0a392d793ee305732fa1cbaa2e672195a1a423ce
[INFO] running `"docker" "start" "-a" "7c37f953e00a42a42491eefc0a392d793ee305732fa1cbaa2e672195a1a423ce"`
[INFO] [stderr]    Compiling nix v0.13.0
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling rust-9p v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]   --> src/lib.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | #![feature(try_trait)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/error.rs:78:32
[INFO] [stderr]    |
[INFO] [stderr] 78 |     fn cause(&self) -> Option<&std::error::Error> {
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::error::Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/srv.rs:341:14
[INFO] [stderr]     |
[INFO] [stderr] 341 |     fs: &mut Filesystem<Fid = FsFid>,
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Filesystem<Fid = FsFid>`
[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 `rust-9p`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7c37f953e00a42a42491eefc0a392d793ee305732fa1cbaa2e672195a1a423ce"`
[INFO] running `"docker" "rm" "-f" "7c37f953e00a42a42491eefc0a392d793ee305732fa1cbaa2e672195a1a423ce"`
[INFO] [stdout] 7c37f953e00a42a42491eefc0a392d793ee305732fa1cbaa2e672195a1a423ce