[INFO] updating cached repository deadalusai/rust-website [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/deadalusai/rust-website [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/deadalusai/rust-website" "work/ex/beta-1.38-1/sources/1.37.0/gh/deadalusai/rust-website"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/deadalusai/rust-website'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/deadalusai/rust-website" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/deadalusai/rust-website"` [INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/deadalusai/rust-website'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] e98603adba606644989da5fd97f7a08937910126 [INFO] sha for GitHub repo deadalusai/rust-website: e98603adba606644989da5fd97f7a08937910126 [INFO] validating manifest of deadalusai/rust-website 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 deadalusai/rust-website 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 deadalusai/rust-website [INFO] finished frobbing deadalusai/rust-website [INFO] frobbed toml for deadalusai/rust-website written to work/ex/beta-1.38-1/sources/1.37.0/gh/deadalusai/rust-website/Cargo.toml [INFO] started frobbing deadalusai/rust-website [INFO] finished frobbing deadalusai/rust-website [INFO] frobbed toml for deadalusai/rust-website written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/deadalusai/rust-website/Cargo.toml [INFO] crate deadalusai/rust-website 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] [stderr] Blocking waiting for file lock on package cache [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] testing deadalusai/rust-website 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/deadalusai/rust-website:/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] ad752b731dac2d866203f3e74b9bd90b23ed5fd45ae4c0b931916fba50331c73 [INFO] running `"docker" "start" "-a" "ad752b731dac2d866203f3e74b9bd90b23ed5fd45ae4c0b931916fba50331c73"` [INFO] [stderr] Compiling httparse v1.2.0 [INFO] [stderr] Compiling rustc-serialize v0.3.21 [INFO] [stderr] Compiling route-recognizer v0.1.11 [INFO] [stderr] Compiling num_cpus v1.1.0 [INFO] [stderr] Compiling url v1.2.3 [INFO] [stderr] Compiling time v0.1.35 [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-1.2.3/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 cookie v0.2.5 [INFO] [stderr] Compiling hyper v0.9.12 [INFO] [stderr] Compiling conduit-mime-types v0.7.3 [INFO] [stderr] Compiling iron v0.4.0 [INFO] [stderr] Compiling maud v0.13.0 [INFO] [stderr] Compiling mount v0.2.1 [INFO] [stderr] Compiling iron-pipeline v0.1.0 (https://github.com/deadalusai/iron-pipeline#e6567ad1) [INFO] [stderr] Compiling router v0.4.0 [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-0.13.0/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" "ad752b731dac2d866203f3e74b9bd90b23ed5fd45ae4c0b931916fba50331c73"` [INFO] running `"docker" "rm" "-f" "ad752b731dac2d866203f3e74b9bd90b23ed5fd45ae4c0b931916fba50331c73"` [INFO] [stdout] ad752b731dac2d866203f3e74b9bd90b23ed5fd45ae4c0b931916fba50331c73