[INFO] updating cached repository https://github.com/autovis/nebra
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0fc36d6e74374457a25e8d1dcc2324a12ad6340d
[INFO] testing autovis/nebra against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fautovis%2Fnebra" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/autovis/nebra on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/autovis/nebra
[INFO] finished tweaking git repo https://github.com/autovis/nebra
[INFO] tweaked toml for git repo https://github.com/autovis/nebra written to work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/autovis/nebra already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] ae16d5763c9395f4e2f709251259372dde78811dfb36360ea29358b2e4e07aa8
[INFO] running `"docker" "start" "-a" "ae16d5763c9395f4e2f709251259372dde78811dfb36360ea29358b2e4e07aa8"`
[INFO] [stderr]    Compiling nebra v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0515]: cannot return value referencing local variable `bor`
[INFO] [stderr]   --> src/stream.rs:93:9
[INFO] [stderr]    |
[INFO] [stderr] 91 |             retval = bor.get_unchecked(((self.index() as usize) - bars_ago) % size);
[INFO] [stderr]    |                      --- `bor` is borrowed here
[INFO] [stderr] 92 |         }
[INFO] [stderr] 93 |         retval
[INFO] [stderr]    |         ^^^^^^ returns a value referencing data owned by the current function
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow data in a dereference of `std::cell::Ref<'_, std::vec::Vec<T>>` as mutable
[INFO] [stderr]   --> src/stream.rs:99:9
[INFO] [stderr]    |
[INFO] [stderr] 99 |         self.buffer.borrow()[idx % size] = value;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^ cannot borrow as mutable
[INFO] [stderr]    |
[INFO] [stderr]    = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::cell::Ref<'_, std::vec::Vec<T>>`
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow data in a dereference of `std::cell::Ref<'_, std::vec::Vec<T>>` as mutable
[INFO] [stderr]    --> src/stream.rs:105:13
[INFO] [stderr]     |
[INFO] [stderr] 105 |             self.buffer.borrow().push(Default::default());
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ cannot borrow as mutable
[INFO] [stderr]     |
[INFO] [stderr]     = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::cell::Ref<'_, std::vec::Vec<T>>`
[INFO] [stderr] 
[INFO] [stderr] error[E0596]: cannot borrow data in a dereference of `std::cell::Ref<'_, std::vec::Vec<T>>` as mutable
[INFO] [stderr]    --> src/stream.rs:108:13
[INFO] [stderr]     |
[INFO] [stderr] 108 |             self.buffer.borrow()[(self.index.get() as usize) % size] = Default::default();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ cannot borrow as mutable
[INFO] [stderr]     |
[INFO] [stderr]     = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `std::cell::Ref<'_, std::vec::Vec<T>>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0515, E0596.
[INFO] [stderr] For more information about an error, try `rustc --explain E0515`.
[INFO] [stderr] error: could not compile `nebra`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ae16d5763c9395f4e2f709251259372dde78811dfb36360ea29358b2e4e07aa8"`
[INFO] running `"docker" "rm" "-f" "ae16d5763c9395f4e2f709251259372dde78811dfb36360ea29358b2e4e07aa8"`
[INFO] [stdout] ae16d5763c9395f4e2f709251259372dde78811dfb36360ea29358b2e4e07aa8