[INFO] updating cached repository monte-language/rum
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/monte-language/rum
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/monte-language/rum" "work/ex/beta-1.37-6/sources/1.36.0/gh/monte-language/rum"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/monte-language/rum'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/monte-language/rum" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/monte-language/rum"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/monte-language/rum'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ab3ad785838f46a867b49d0e41280befd1d3a5bd
[INFO] sha for GitHub repo monte-language/rum: ab3ad785838f46a867b49d0e41280befd1d3a5bd
[INFO] validating manifest of monte-language/rum 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 monte-language/rum 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 monte-language/rum
[INFO] finished frobbing monte-language/rum
[INFO] frobbed toml for monte-language/rum written to work/ex/beta-1.37-6/sources/1.36.0/gh/monte-language/rum/Cargo.toml
[INFO] started frobbing monte-language/rum
[INFO] finished frobbing monte-language/rum
[INFO] frobbed toml for monte-language/rum written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/monte-language/rum/Cargo.toml
[INFO] crate monte-language/rum 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 monte-language/rum against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/monte-language/rum:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 4271a95c36660525a113f0778d1b8efe9f8b1d05d900d25945764feea60633f6
[INFO] running `"docker" "start" "-a" "4271a95c36660525a113f0778d1b8efe9f8b1d05d900d25945764feea60633f6"`
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling bincode v0.6.0
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling docopt v0.6.86
[INFO] [stderr]    Compiling rum v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0308]: mismatched types
[INFO] [stderr]   --> src/main.rs:49:21
[INFO] [stderr]    |
[INFO] [stderr] 49 |     load_mast::load(mast_reader);
[INFO] [stderr]    |                     ^^^^^^^^^^^ expected struct `std::sync::Arc`, found struct `std::boxed::Box`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::sync::Arc<std::io::BufReader<std::boxed::Box<(dyn std::io::Read + 'static)>>>`
[INFO] [stderr]               found type `std::boxed::Box<std::io::BufReader<std::boxed::Box<dyn std::io::Read>>>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `rum`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "4271a95c36660525a113f0778d1b8efe9f8b1d05d900d25945764feea60633f6"`
[INFO] running `"docker" "rm" "-f" "4271a95c36660525a113f0778d1b8efe9f8b1d05d900d25945764feea60633f6"`
[INFO] [stdout] 4271a95c36660525a113f0778d1b8efe9f8b1d05d900d25945764feea60633f6