[INFO] updating cached repository pnevyk/latexerr
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pnevyk/latexerr
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pnevyk/latexerr" "work/ex/beta-1.37-6/sources/1.36.0/gh/pnevyk/latexerr"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/pnevyk/latexerr'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pnevyk/latexerr" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pnevyk/latexerr"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pnevyk/latexerr'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0ae6fb998ba919413b572ac7d6ae8ae687fd9d8b
[INFO] sha for GitHub repo pnevyk/latexerr: 0ae6fb998ba919413b572ac7d6ae8ae687fd9d8b
[INFO] validating manifest of pnevyk/latexerr 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 pnevyk/latexerr 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 pnevyk/latexerr
[INFO] finished frobbing pnevyk/latexerr
[INFO] frobbed toml for pnevyk/latexerr written to work/ex/beta-1.37-6/sources/1.36.0/gh/pnevyk/latexerr/Cargo.toml
[INFO] started frobbing pnevyk/latexerr
[INFO] finished frobbing pnevyk/latexerr
[INFO] frobbed toml for pnevyk/latexerr written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/pnevyk/latexerr/Cargo.toml
[INFO] crate pnevyk/latexerr 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 pnevyk/latexerr 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-6/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/pnevyk/latexerr:/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] fb0e6cc218567aca985938da76e3230b42704227f8b0ca2af901be8b72256a6a
[INFO] running `"docker" "start" "-a" "fb0e6cc218567aca985938da76e3230b42704227f8b0ca2af901be8b72256a6a"`
[INFO] [stderr]    Compiling libc v0.2.40
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling regex v0.2.10
[INFO] [stderr]    Compiling latexerr v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(iterator_step_by)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(box_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(associated_type_defaults)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/rules.rs:257:31
[INFO] [stderr]     |
[INFO] [stderr] 257 |     pub fn rules() -> Vec<&'a Rule<'a>> {
[INFO] [stderr]     |                               ^^^^^^^^ help: use `dyn`: `dyn Rule<'a>`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `latexerr`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "fb0e6cc218567aca985938da76e3230b42704227f8b0ca2af901be8b72256a6a"`
[INFO] running `"docker" "rm" "-f" "fb0e6cc218567aca985938da76e3230b42704227f8b0ca2af901be8b72256a6a"`
[INFO] [stdout] fb0e6cc218567aca985938da76e3230b42704227f8b0ca2af901be8b72256a6a