[INFO] updating cached repository pop-os/debrepbuild
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/pop-os/debrepbuild
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/pop-os/debrepbuild" "work/ex/beta-1.38-1/sources/1.37.0/gh/pop-os/debrepbuild"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/pop-os/debrepbuild'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/pop-os/debrepbuild" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pop-os/debrepbuild"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pop-os/debrepbuild'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 73a4f06ac19a044a67850a1fac0c6a06e6f6eeb1
[INFO] sha for GitHub repo pop-os/debrepbuild: 73a4f06ac19a044a67850a1fac0c6a06e6f6eeb1
[INFO] validating manifest of pop-os/debrepbuild on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of pop-os/debrepbuild on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing pop-os/debrepbuild
[INFO] finished frobbing pop-os/debrepbuild
[INFO] frobbed toml for pop-os/debrepbuild written to work/ex/beta-1.38-1/sources/1.37.0/gh/pop-os/debrepbuild/Cargo.toml
[INFO] started frobbing pop-os/debrepbuild
[INFO] finished frobbing pop-os/debrepbuild
[INFO] frobbed toml for pop-os/debrepbuild written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pop-os/debrepbuild/Cargo.toml
[INFO] crate pop-os/debrepbuild already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing pop-os/debrepbuild against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/pop-os/debrepbuild:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 9e8073001164a97505443b064b47b25311cf636e279720066cf3fd2751033734
[INFO] running `"docker" "start" "-a" "9e8073001164a97505443b064b47b25311cf636e279720066cf3fd2751033734"`
[INFO] [stderr]    Compiling encoding_rs v0.8.9
[INFO] [stderr]    Compiling ego-tree v0.5.0
[INFO] [stderr]    Compiling atomic-option v0.1.2
[INFO] [stderr]    Compiling numtoa v0.2.3
[INFO] [stderr]    Compiling progress-streams v1.0.0
[INFO] [stderr]    Compiling same-file v1.0.3
[INFO] [stderr]    Compiling hex-view v0.1.2
[INFO] [stderr]    Compiling cascade v0.1.2
[INFO] [stderr]    Compiling deb-version v0.1.0
[INFO] [stderr]    Compiling unicase v2.1.0
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling subprocess v0.1.16
[INFO] [stderr]    Compiling servo_arc v0.1.1
[INFO] [stderr]    Compiling ar v0.6.0
[INFO] [stderr]    Compiling filetime v0.2.1
[INFO] [stderr]    Compiling itertools v0.7.8
[INFO] [stderr]    Compiling vergen v0.1.1
[INFO] [stderr]    Compiling walkdir v2.2.5
[INFO] [stderr]    Compiling mio v0.6.16
[INFO] [stderr]    Compiling want v0.0.6
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling fern v0.5.6
[INFO] [stderr]    Compiling tokio-timer v0.2.7
[INFO] [stderr]    Compiling tempfile v3.0.4
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling tokio-io v0.1.9
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]    Compiling tar v0.4.17
[INFO] [stderr]    Compiling lzma-sys v0.1.10
[INFO] [stderr]    Compiling serde_json v1.0.32
[INFO] [stderr]    Compiling toml v0.4.8
[INFO] [stderr]    Compiling debrepobuilder v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]    Compiling crossbeam-epoch v0.5.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.6.0
[INFO] [stderr]    Compiling syn v0.15.8
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling tendril v0.4.0
[INFO] [stderr]    Compiling tendril v0.3.1
[INFO] [stderr]    Compiling bus v2.0.0
[INFO] [stderr]    Compiling mio-uds v0.6.7
[INFO] [stderr]    Compiling tokio-codec v0.1.1
[INFO] [stderr]    Compiling h2 v0.1.12
[INFO] [stderr]    Compiling serde_urlencoded v0.5.3
[INFO] [stderr]    Compiling gzip-header v0.2.0
[INFO] [stderr]    Compiling utime v0.2.1
[INFO] [stderr]    Compiling mime v0.3.9
[INFO] [stderr]    Compiling crossbeam-deque v0.6.1
[INFO] [stderr]    Compiling crossbeam-deque v0.5.2
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling bus_writer v0.1.2
[INFO] [stderr]    Compiling deflate v0.7.19
[INFO] [stderr]    Compiling md-5 v0.7.0
[INFO] [stderr]    Compiling string_cache_codegen v0.4.1
[INFO] [stderr]    Compiling tokio-threadpool v0.1.7
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling selectors v0.19.0
[INFO] [stderr]    Compiling xz2 v0.1.5
[INFO] [stderr]    Compiling tokio-reactor v0.1.6
[INFO] [stderr]    Compiling crossbeam-channel v0.2.6
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling tokio-fs v0.1.3
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling string_cache v0.6.2
[INFO] [stderr]    Compiling markup5ever v0.3.2
[INFO] [stderr]    Compiling debarchive v0.1.0
[INFO] [stderr]    Compiling tokio-tcp v0.1.2
[INFO] [stderr]    Compiling tokio-udp v0.1.2
[INFO] [stderr]    Compiling tokio-uds v0.2.2
[INFO] [stderr]    Compiling crossbeam v0.4.1
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling serde_derive v1.0.79
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling tokio v0.1.11
[INFO] [stderr]    Compiling hyper v0.12.11
[INFO] [stderr]    Compiling cssparser-macros v0.3.4
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]    Compiling html5ever v0.18.0
[INFO] [stderr]    Compiling cssparser v0.23.10
[INFO] [stderr]    Compiling html5ever v0.22.3
[INFO] [stderr]    Compiling failure v0.1.2
[INFO] [stderr]    Compiling hyper-tls v0.3.1
[INFO] [stderr]    Compiling select v0.4.2
[INFO] [stderr]    Compiling reqwest v0.9.2
[INFO] [stderr]    Compiling markup5ever v0.7.2
[INFO] [stderr]    Compiling parallel-getter v0.2.0
[INFO] [stderr] error[E0506]: cannot assign to `self.input.cached_token` because it is borrowed
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cssparser-0.23.10/src/parser.rs:572:17
[INFO] [stderr]     |
[INFO] [stderr] 547 |     pub fn next_including_whitespace_and_comments(&mut self) -> Result<&Token<'i>, BasicParseError<'i>> {
[INFO] [stderr]     |                                                   - let's call the lifetime of this reference `'1`
[INFO] [stderr] ...
[INFO] [stderr] 560 |             Some(ref cached_token)
[INFO] [stderr]     |                  ---------------- borrow of `self.input.cached_token` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 572 |                 self.input.cached_token = Some(CachedToken {
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^ assignment to borrowed `self.input.cached_token` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 584 |         Ok(token)
[INFO] [stderr]     |         --------- returning this value requires that `self.input.cached_token.0` is borrowed for `'1`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0506`.
[INFO] [stderr] error: Could not compile `cssparser`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "9e8073001164a97505443b064b47b25311cf636e279720066cf3fd2751033734"`
[INFO] running `"docker" "rm" "-f" "9e8073001164a97505443b064b47b25311cf636e279720066cf3fd2751033734"`
[INFO] [stdout] 9e8073001164a97505443b064b47b25311cf636e279720066cf3fd2751033734