[INFO] updating cached repository FTB-Gamepedia/ftb-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/FTB-Gamepedia/ftb-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/FTB-Gamepedia/ftb-rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/FTB-Gamepedia/ftb-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/FTB-Gamepedia/ftb-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/FTB-Gamepedia/ftb-rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FTB-Gamepedia/ftb-rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FTB-Gamepedia/ftb-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bd39d6f908f6addf485c4356141ad9d5f347ebbc
[INFO] sha for GitHub repo FTB-Gamepedia/ftb-rs: bd39d6f908f6addf485c4356141ad9d5f347ebbc
[INFO] validating manifest of FTB-Gamepedia/ftb-rs 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 FTB-Gamepedia/ftb-rs 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 FTB-Gamepedia/ftb-rs
[INFO] finished frobbing FTB-Gamepedia/ftb-rs
[INFO] frobbed toml for FTB-Gamepedia/ftb-rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/FTB-Gamepedia/ftb-rs/Cargo.toml
[INFO] started frobbing FTB-Gamepedia/ftb-rs
[INFO] finished frobbing FTB-Gamepedia/ftb-rs
[INFO] frobbed toml for FTB-Gamepedia/ftb-rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/FTB-Gamepedia/ftb-rs/Cargo.toml
[INFO] crate FTB-Gamepedia/ftb-rs 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 FTB-Gamepedia/ftb-rs 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/FTB-Gamepedia/ftb-rs:/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] 75b0ee74317fbce21482f872bc1d81c01455f9cf8fd098aba314b91752232fb2
[INFO] running `"docker" "start" "-a" "75b0ee74317fbce21482f872bc1d81c01455f9cf8fd098aba314b91752232fb2"`
[INFO] [stderr]    Compiling libc v0.2.42
[INFO] [stderr]    Compiling cfg-if v0.1.4
[INFO] [stderr]    Compiling byteorder v1.2.3
[INFO] [stderr]    Compiling lazy_static v1.0.1
[INFO] [stderr]    Compiling futures v0.1.21
[INFO] [stderr]    Compiling pkg-config v0.3.11
[INFO] [stderr]    Compiling cc v1.0.17
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]    Compiling try-lock v0.1.0
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling serde v1.0.68
[INFO] [stderr]    Compiling regex v1.0.1
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling itoa v0.4.1
[INFO] [stderr]    Compiling same-file v1.0.2
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling log v0.4.3
[INFO] [stderr]    Compiling encoding_rs v0.7.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.6
[INFO] [stderr]    Compiling base64 v0.9.2
[INFO] [stderr]    Compiling deflate v0.7.18
[INFO] [stderr]    Compiling inflate v0.4.3
[INFO] [stderr]    Compiling idna v0.1.4
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.33
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling walkdir v2.1.4
[INFO] [stderr]    Compiling regex-syntax v0.6.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.3
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling bytes v0.4.8
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling openssl-sys v0.9.33
[INFO] [stderr]    Compiling tokio-executor v0.1.2
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling relay v0.1.1
[INFO] [stderr]    Compiling want v0.0.4
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling aho-corasick v0.6.5
[INFO] [stderr]    Compiling cookie v0.10.1
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling uuid v0.6.5
[INFO] [stderr]    Compiling crossbeam-deque v0.3.1
[INFO] [stderr]    Compiling phf_shared v0.7.22
[INFO] [stderr]    Compiling mime v0.3.7
[INFO] [stderr]    Compiling libflate v0.1.15
[INFO] [stderr]    Compiling syn v0.14.2
[INFO] [stderr]    Compiling tokio-timer v0.2.4
[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-1.7.0/src/form_urlencoded.rs:261:40
[INFO] [stderr]     |
[INFO] [stderr] 259 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 260 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 261 |     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 tokio-io v0.1.7
[INFO] [stderr]    Compiling tokio-threadpool v0.1.4
[INFO] [stderr]    Compiling phf_generator v0.7.22
[INFO] [stderr]    Compiling phf v0.7.22
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling phf_codegen v0.7.22
[INFO] [stderr]    Compiling tokio-codec v0.1.0
[INFO] [stderr]    Compiling tokio-reactor v0.1.2
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.5
[INFO] [stderr]    Compiling tokio-fs v0.1.1
[INFO] [stderr]    Compiling tokio-tcp v0.1.0
[INFO] [stderr]    Compiling tokio-udp v0.1.1
[INFO] [stderr]    Compiling tokio v0.1.7
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.68
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling image v0.19.0
[INFO] [stderr]    Compiling serde_urlencoded v0.5.2
[INFO] [stderr]    Compiling serde_json v1.0.22
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling hyper v0.11.27
[INFO] [stderr]    Compiling hyper-tls v0.1.3
[INFO] [stderr]    Compiling reqwest v0.8.6
[INFO] [stderr]    Compiling mediawiki v0.0.1 (https://github.com/FTB-Gamepedia/mediawiki-rs#3301c151)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/git/checkouts/mediawiki-rs-ccdb6ca811e3accb/3301c15/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(try_trait)]
[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 `mediawiki`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "75b0ee74317fbce21482f872bc1d81c01455f9cf8fd098aba314b91752232fb2"`
[INFO] running `"docker" "rm" "-f" "75b0ee74317fbce21482f872bc1d81c01455f9cf8fd098aba314b91752232fb2"`
[INFO] [stdout] 75b0ee74317fbce21482f872bc1d81c01455f9cf8fd098aba314b91752232fb2