[INFO] crate backslash-z 0.2.0 is already in cache
[INFO] extracting crate backslash-z 0.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/backslash-z/0.2.0
[INFO] extracting crate backslash-z 0.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/backslash-z/0.2.0
[INFO] validating manifest of backslash-z-0.2.0 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 backslash-z-0.2.0 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 backslash-z-0.2.0
[INFO] finished frobbing backslash-z-0.2.0
[INFO] frobbed toml for backslash-z-0.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/backslash-z/0.2.0/Cargo.toml
[INFO] started frobbing backslash-z-0.2.0
[INFO] finished frobbing backslash-z-0.2.0
[INFO] frobbed toml for backslash-z-0.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/backslash-z/0.2.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 backslash-z-0.2.0 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/backslash-z/0.2.0:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 77fbc97cbb6d8f9f925b09b349da47cb55d56a8c1e665fa18ccd3b4ed10a8455
[INFO] running `"docker" "start" "-a" "77fbc97cbb6d8f9f925b09b349da47cb55d56a8c1e665fa18ccd3b4ed10a8455"`
[INFO] [stderr]    Compiling syn v1.0.3
[INFO] [stderr]    Compiling thin-slice v0.1.1
[INFO] [stderr]    Compiling ego-tree v0.6.0
[INFO] [stderr]    Compiling servo_arc v0.1.1
[INFO] [stderr]    Compiling dtoa-short v0.3.2
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling selectors v0.20.0
[INFO] [stderr]    Compiling selectors v0.21.0
[INFO] [stderr]    Compiling tokio-threadpool v0.1.15
[INFO] [stderr]    Compiling tokio-fs v0.1.6
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling hyper v0.12.33
[INFO] [stderr]    Compiling hyper-tls v0.3.2
[INFO] [stderr]    Compiling cssparser v0.24.1
[INFO] [stderr]    Compiling serde_derive v1.0.99
[INFO] [stderr]    Compiling cssparser v0.25.9
[INFO] [stderr]    Compiling cssparser-macros v0.3.6
[INFO] [stderr] warning[E0506]: cannot assign to `self.input.cached_token` because it is borrowed
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cssparser-0.24.1/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]     = 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 serde v1.0.99
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling markup5ever v0.7.5
[INFO] [stderr]    Compiling cookie_store v0.7.0
[INFO] [stderr]    Compiling daummap v0.2.2
[INFO] [stderr]    Compiling reqwest v0.9.20
[INFO] [stderr]    Compiling scraper v0.9.2
[INFO] [stderr]    Compiling scraper v0.10.1
[INFO] [stderr]    Compiling airkorea v0.4.3
[INFO] [stderr]    Compiling daumdic v0.6.1
[INFO] [stderr]    Compiling howto v0.2.1
[INFO] [stderr]    Compiling backslash-z v0.2.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 21s
[INFO] running `"docker" "inspect" "77fbc97cbb6d8f9f925b09b349da47cb55d56a8c1e665fa18ccd3b4ed10a8455"`
[INFO] running `"docker" "rm" "-f" "77fbc97cbb6d8f9f925b09b349da47cb55d56a8c1e665fa18ccd3b4ed10a8455"`
[INFO] [stdout] 77fbc97cbb6d8f9f925b09b349da47cb55d56a8c1e665fa18ccd3b4ed10a8455
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/backslash-z/0.2.0:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ec8a5b58e5ba94bf29ddadb6a6af9edf88cc97841c438b37c50878f44d152842
[INFO] running `"docker" "start" "-a" "ec8a5b58e5ba94bf29ddadb6a6af9edf88cc97841c438b37c50878f44d152842"`
[INFO] [stderr]    Compiling backslash-z v0.2.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.92s
[INFO] running `"docker" "inspect" "ec8a5b58e5ba94bf29ddadb6a6af9edf88cc97841c438b37c50878f44d152842"`
[INFO] running `"docker" "rm" "-f" "ec8a5b58e5ba94bf29ddadb6a6af9edf88cc97841c438b37c50878f44d152842"`
[INFO] [stdout] ec8a5b58e5ba94bf29ddadb6a6af9edf88cc97841c438b37c50878f44d152842
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/backslash-z/0.2.0:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 6c7dc3b6c91306be2bbdd723e37a89369a7d0d9d4285d6d3d7bfe1fbf1184964
[INFO] running `"docker" "start" "-a" "6c7dc3b6c91306be2bbdd723e37a89369a7d0d9d4285d6d3d7bfe1fbf1184964"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/backslash_z-83819ff6fd8265e0
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests backslash-z
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "6c7dc3b6c91306be2bbdd723e37a89369a7d0d9d4285d6d3d7bfe1fbf1184964"`
[INFO] running `"docker" "rm" "-f" "6c7dc3b6c91306be2bbdd723e37a89369a7d0d9d4285d6d3d7bfe1fbf1184964"`
[INFO] [stdout] 6c7dc3b6c91306be2bbdd723e37a89369a7d0d9d4285d6d3d7bfe1fbf1184964