[INFO] updating cached repository blakemr/learningrust_multiws
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/blakemr/learningrust_multiws
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/blakemr/learningrust_multiws" "work/ex/beta-1.38-1/sources/1.37.0/gh/blakemr/learningrust_multiws"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/blakemr/learningrust_multiws'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/blakemr/learningrust_multiws" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/blakemr/learningrust_multiws"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/blakemr/learningrust_multiws'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d2b9b7b9b4948467c8389060230b4686a85d9c1e
[INFO] sha for GitHub repo blakemr/learningrust_multiws: d2b9b7b9b4948467c8389060230b4686a85d9c1e
[INFO] validating manifest of blakemr/learningrust_multiws 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 blakemr/learningrust_multiws 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 blakemr/learningrust_multiws
[INFO] finished frobbing blakemr/learningrust_multiws
[INFO] frobbed toml for blakemr/learningrust_multiws written to work/ex/beta-1.38-1/sources/1.37.0/gh/blakemr/learningrust_multiws/Cargo.toml
[INFO] started frobbing blakemr/learningrust_multiws
[INFO] finished frobbing blakemr/learningrust_multiws
[INFO] frobbed toml for blakemr/learningrust_multiws written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/blakemr/learningrust_multiws/Cargo.toml
[INFO] crate blakemr/learningrust_multiws 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing blakemr/learningrust_multiws 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/blakemr/learningrust_multiws:/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] f4da544aea0751556cc4818dce3968448d405a2086389d3d861dbc4c4c562e80
[INFO] running `"docker" "start" "-a" "f4da544aea0751556cc4818dce3968448d405a2086389d3d861dbc4c4c562e80"`
[INFO] [stderr]    Compiling hello_server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0411]: expected trait, found self type `Self`
[INFO] [stderr]   --> src/lib.rs:12:31
[INFO] [stderr]    |
[INFO] [stderr] 12 |     fn call_box(self: Box<dyn Self>);
[INFO] [stderr]    |                               ^^^^ `Self` is only available in impls, traits, and type definitions
[INFO] [stderr] 
[INFO] [stderr] error[E0404]: expected trait, found type parameter `F`
[INFO] [stderr]   --> src/lib.rs:16:31
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn call_box(self: Box<dyn F>) {
[INFO] [stderr]    |                               ^ help: a trait with a similar name exists: `Fn`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0404, E0411.
[INFO] [stderr] For more information about an error, try `rustc --explain E0404`.
[INFO] [stderr] error: Could not compile `hello_server`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f4da544aea0751556cc4818dce3968448d405a2086389d3d861dbc4c4c562e80"`
[INFO] running `"docker" "rm" "-f" "f4da544aea0751556cc4818dce3968448d405a2086389d3d861dbc4c4c562e80"`
[INFO] [stdout] f4da544aea0751556cc4818dce3968448d405a2086389d3d861dbc4c4c562e80