[INFO] updating cached repository bogdad/timecutrust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bogdad/timecutrust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bogdad/timecutrust" "work/ex/beta-1.37-6/sources/1.36.0/gh/bogdad/timecutrust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/bogdad/timecutrust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bogdad/timecutrust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bogdad/timecutrust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bogdad/timecutrust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b86c31e7c7d947303966859d10634c3778d286d6
[INFO] sha for GitHub repo bogdad/timecutrust: b86c31e7c7d947303966859d10634c3778d286d6
[INFO] validating manifest of bogdad/timecutrust 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 bogdad/timecutrust 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 bogdad/timecutrust
[INFO] finished frobbing bogdad/timecutrust
[INFO] frobbed toml for bogdad/timecutrust written to work/ex/beta-1.37-6/sources/1.36.0/gh/bogdad/timecutrust/Cargo.toml
[INFO] started frobbing bogdad/timecutrust
[INFO] finished frobbing bogdad/timecutrust
[INFO] frobbed toml for bogdad/timecutrust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/bogdad/timecutrust/Cargo.toml
[INFO] crate bogdad/timecutrust 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 bogdad/timecutrust 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-1/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/bogdad/timecutrust:/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] d9454641eae269ed69ae5ef561704858ba9623ab8460586b0461f2215f9c7389
[INFO] running `"docker" "start" "-a" "d9454641eae269ed69ae5ef561704858ba9623ab8460586b0461f2215f9c7389"`
[INFO] [stderr]    Compiling libc v0.2.15
[INFO] [stderr]    Compiling regex-syntax v0.3.4
[INFO] [stderr]    Compiling getopts v0.2.14
[INFO] [stderr]    Compiling num v0.1.35
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.14/src/lib.rs:1008:33
[INFO] [stderr]      |
[INFO] [stderr] 955  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]      |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 959  |         state = match (state, whitespace, limit) {
[INFO] [stderr]      |                        ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 1008 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]      |                                 ^ use of borrowed `state`
[INFO] [stderr] 1009 |         machine(&mut cont, (fake_i, ' '));
[INFO] [stderr]      |         ------- borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]      = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling time v0.1.35
[INFO] [stderr]    Compiling thread_local v0.2.6
[INFO] [stderr]    Compiling aho-corasick v0.5.2
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling regex v0.1.73
[INFO] [stderr]    Compiling timecutrust 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(unboxed_closures, fn_traits, core)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Lines`
[INFO] [stderr]  --> src/main.rs:7:32
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::io::{self, BufReader, Lines, Write};
[INFO] [stderr]   |                                ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Error`
[INFO] [stderr]   --> src/main.rs:11:25
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::io::{SeekFrom, Error, ErrorKind};
[INFO] [stderr]    |                         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Cursor`
[INFO] [stderr]  --> src/textfileutils.rs:1:36
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::io::{SeekFrom, BufReader, Cursor};
[INFO] [stderr]   |                                    ^^^^^^
[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 `timecutrust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d9454641eae269ed69ae5ef561704858ba9623ab8460586b0461f2215f9c7389"`
[INFO] running `"docker" "rm" "-f" "d9454641eae269ed69ae5ef561704858ba9623ab8460586b0461f2215f9c7389"`
[INFO] [stdout] d9454641eae269ed69ae5ef561704858ba9623ab8460586b0461f2215f9c7389