[INFO] updating cached repository Nemo157/grarr
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Nemo157/grarr
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Nemo157/grarr" "work/ex/beta-1.38-1/sources/1.37.0/gh/Nemo157/grarr"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Nemo157/grarr'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Nemo157/grarr" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nemo157/grarr"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nemo157/grarr'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a104ff6d062001e52df628b6f0b9629bebc9099c
[INFO] sha for GitHub repo Nemo157/grarr: a104ff6d062001e52df628b6f0b9629bebc9099c
[INFO] validating manifest of Nemo157/grarr 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 Nemo157/grarr 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 Nemo157/grarr
[INFO] finished frobbing Nemo157/grarr
[INFO] frobbed toml for Nemo157/grarr written to work/ex/beta-1.38-1/sources/1.37.0/gh/Nemo157/grarr/Cargo.toml
[INFO] started frobbing Nemo157/grarr
[INFO] finished frobbing Nemo157/grarr
[INFO] frobbed toml for Nemo157/grarr written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Nemo157/grarr/Cargo.toml
[INFO] crate Nemo157/grarr 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 Nemo157/grarr 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Nemo157/grarr:/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] 0c4cc1f888e21791ae494e65ba5c16dacbae2061b5c9a2342f7a69f85e23e4ac
[INFO] running `"docker" "start" "-a" "0c4cc1f888e21791ae494e65ba5c16dacbae2061b5c9a2342f7a69f85e23e4ac"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling openssl v0.9.12
[INFO] [stderr]    Compiling serde v1.0.8
[INFO] [stderr]    Compiling pulldown-cmark v0.0.14
[INFO] [stderr]    Compiling if_chain v0.1.2
[INFO] [stderr]    Compiling maplit v0.1.4
[INFO] [stderr]    Compiling route-recognizer v0.1.11 (https://github.com/Nemo157/route-recognizer.rs?rev=reverse_priority#9c7422a8)
[INFO] [stderr]    Compiling grarr v0.0.3 (/opt/crater/workdir)
[INFO] [stderr]    Compiling lru_time_cache v0.6.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.2
[INFO] [stderr]    Compiling num_cpus v1.4.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.11
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling miniz-sys v0.1.9
[INFO] [stderr]    Compiling mime v0.2.4
[INFO] [stderr]    Compiling libflate v0.1.6
[INFO] [stderr]    Compiling walkdir v1.0.7
[INFO] [stderr]    Compiling phf_generator v0.7.21
[INFO] [stderr]    Compiling hyper v0.10.10
[INFO] [stderr]    Compiling cookie v0.7.6
[INFO] [stderr]    Compiling string_cache_codegen v0.3.1
[INFO] [stderr]    Compiling phf_codegen v0.7.21
[INFO] [stderr]    Compiling serde_derive_internals v0.15.1
[INFO] [stderr]    Compiling idna v0.1.2
[INFO] [stderr]    Compiling html5ever v0.13.1
[INFO] [stderr]    Compiling tendril v0.2.4
[INFO] [stderr]    Compiling chrono v0.3.1
[INFO] [stderr]    Compiling string_cache v0.4.0
[INFO] [stderr]    Compiling html5ever-atoms v0.2.2
[INFO] [stderr]    Compiling flate2 v0.2.19
[INFO] [stderr]    Compiling url v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.8
[INFO] [stderr] warning[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.4.0/src/form_urlencoded.rs:246:40
[INFO] [stderr]     |
[INFO] [stderr] 244 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 245 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 246 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stderr]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stderr]     |                                        |
[INFO] [stderr]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[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_json v1.0.2
[INFO] [stderr]    Compiling toml v0.4.1
[INFO] [stderr]    Compiling backtrace v0.3.2
[INFO] [stderr]    Compiling native-tls v0.1.2
[INFO] [stderr]    Compiling serde_urlencoded v0.4.3
[INFO] [stderr]    Compiling git2 v0.6.5
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling gravatar v0.1.5
[INFO] [stderr]    Compiling git-appraise v0.3.0 (https://github.com/Nemo157/git-appraise-rs?rev=update#fb161533)
[INFO] [stderr]    Compiling git-ship v0.1.0 (https://github.com/Nemo157/git-ship-rs#dd5422a2)
[INFO] [stderr]    Compiling iron v0.5.1
[INFO] [stderr]    Compiling hyper-native-tls v0.2.2
[INFO] [stderr]    Compiling ammonia v0.3.0
[INFO] [stderr]    Compiling reqwest v0.5.2
[INFO] [stderr]    Compiling maud v0.16.2
[INFO] [stderr]    Compiling logger v0.3.0
[INFO] [stderr]    Compiling router v0.5.1 (https://github.com/Nemo157/router?rev=reverse_priority#98e89156)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/maud-0.16.2/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(specialization)]
[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 `maud`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0c4cc1f888e21791ae494e65ba5c16dacbae2061b5c9a2342f7a69f85e23e4ac"`
[INFO] running `"docker" "rm" "-f" "0c4cc1f888e21791ae494e65ba5c16dacbae2061b5c9a2342f7a69f85e23e4ac"`
[INFO] [stdout] 0c4cc1f888e21791ae494e65ba5c16dacbae2061b5c9a2342f7a69f85e23e4ac