[INFO] updating cached repository loongw/rust-to-js
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/loongw/rust-to-js
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/loongw/rust-to-js" "work/ex/beta-1.37-6/sources/1.36.0/gh/loongw/rust-to-js"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/loongw/rust-to-js'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/loongw/rust-to-js" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/loongw/rust-to-js"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/loongw/rust-to-js'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] da329fc9a65400160d6f5aaaf1b1e530a8245cb7
[INFO] sha for GitHub repo loongw/rust-to-js: da329fc9a65400160d6f5aaaf1b1e530a8245cb7
[INFO] validating manifest of loongw/rust-to-js 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 loongw/rust-to-js 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 loongw/rust-to-js
[INFO] finished frobbing loongw/rust-to-js
[INFO] frobbed toml for loongw/rust-to-js written to work/ex/beta-1.37-6/sources/1.36.0/gh/loongw/rust-to-js/Cargo.toml
[INFO] started frobbing loongw/rust-to-js
[INFO] finished frobbing loongw/rust-to-js
[INFO] frobbed toml for loongw/rust-to-js written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/loongw/rust-to-js/Cargo.toml
[INFO] crate loongw/rust-to-js 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 loongw/rust-to-js 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/loongw/rust-to-js:/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] 65d3ac65aee49875bc26b829216113128e46abe166af80bd9abce84f669574f0
[INFO] running `"docker" "start" "-a" "65d3ac65aee49875bc26b829216113128e46abe166af80bd9abce84f669574f0"`
[INFO] [stderr]    Compiling sdl2-sys v0.27.3
[INFO] [stderr]    Compiling lazy_static v0.2.6
[INFO] [stderr]    Compiling sdl2 v0.29.1
[INFO] [stderr]    Compiling boxgame v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0596]: cannot borrow `main_loop` as mutable, as it is not declared as mutable
[INFO] [stderr]   --> src/main.rs:74:12
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let main_loop = || {
[INFO] [stderr]    |         --------- help: consider changing this to be mutable: `mut main_loop`
[INFO] [stderr] ...
[INFO] [stderr] 74 |     loop { main_loop(); }
[INFO] [stderr]    |            ^^^^^^^^^ cannot borrow as mutable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0596`.
[INFO] [stderr] error: Could not compile `boxgame`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "65d3ac65aee49875bc26b829216113128e46abe166af80bd9abce84f669574f0"`
[INFO] running `"docker" "rm" "-f" "65d3ac65aee49875bc26b829216113128e46abe166af80bd9abce84f669574f0"`
[INFO] [stdout] 65d3ac65aee49875bc26b829216113128e46abe166af80bd9abce84f669574f0