[INFO] updating cached repository Noxime/overhead
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Noxime/overhead
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Noxime/overhead" "work/ex/beta-1.38-1/sources/1.37.0/gh/Noxime/overhead"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Noxime/overhead'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Noxime/overhead" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Noxime/overhead"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Noxime/overhead'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cda551314a0eb17fd3bd2aabf9c3c3aedcfbe3e5
[INFO] sha for GitHub repo Noxime/overhead: cda551314a0eb17fd3bd2aabf9c3c3aedcfbe3e5
[INFO] validating manifest of Noxime/overhead 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 Noxime/overhead 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 Noxime/overhead
[INFO] finished frobbing Noxime/overhead
[INFO] frobbed toml for Noxime/overhead written to work/ex/beta-1.38-1/sources/1.37.0/gh/Noxime/overhead/Cargo.toml
[INFO] started frobbing Noxime/overhead
[INFO] finished frobbing Noxime/overhead
[INFO] frobbed toml for Noxime/overhead written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Noxime/overhead/Cargo.toml
[INFO] crate Noxime/overhead 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 Noxime/overhead 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-2/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/Noxime/overhead:/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] b8da3105b0972f2b227955abbed2a427b94c88c7398d1c8653af07d9a998a04b
[INFO] running `"docker" "start" "-a" "b8da3105b0972f2b227955abbed2a427b94c88c7398d1c8653af07d9a998a04b"`
[INFO] [stderr]    Compiling unicode-normalization v0.1.6
[INFO] [stderr]    Compiling serde v1.0.47
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling encoding_rs v0.7.2
[INFO] [stderr]    Compiling base64 v0.5.2
[INFO] [stderr]    Compiling base64 v0.9.1
[INFO] [stderr]    Compiling bytes v0.4.7
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling tokio-timer v0.2.3
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.1
[INFO] [stderr]    Compiling uuid v0.5.1
[INFO] [stderr]    Compiling tokio-io v0.1.6
[INFO] [stderr]    Compiling phf_shared v0.7.22
[INFO] [stderr]    Compiling libflate v0.1.14
[INFO] [stderr]    Compiling env_logger v0.5.10
[INFO] [stderr]    Compiling serde_derive v1.0.47
[INFO] [stderr]    Compiling crossbeam-deque v0.3.1
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling phf_generator v0.7.22
[INFO] [stderr]    Compiling phf v0.7.22
[INFO] [stderr]    Compiling tokio-reactor v0.1.1
[INFO] [stderr]    Compiling pretty_env_logger v0.2.2
[INFO] [stderr]    Compiling tokio-threadpool v0.1.3
[INFO] [stderr]    Compiling phf_codegen v0.7.22
[INFO] [stderr]    Compiling tokio-tcp v0.1.0
[INFO] [stderr]    Compiling tokio-udp v0.1.0
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.4
[INFO] [stderr]    Compiling tokio-fs v0.1.0
[INFO] [stderr]    Compiling tokio v0.1.6
[INFO] [stderr]    Compiling idna v0.1.4
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling serde_json v1.0.17
[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 hyper v0.10.13
[INFO] [stderr]    Compiling serde_urlencoded v0.5.1
[INFO] [stderr]    Compiling hyper v0.11.26
[INFO] [stderr]    Compiling websocket v0.20.2
[INFO] [stderr]    Compiling hyper-tls v0.1.3
[INFO] [stderr]    Compiling reqwest v0.8.5
[INFO] [stderr]    Compiling overhead v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: proc-macro derive panicked
[INFO] [stderr]   --> src/discord/gateway/mod.rs:16:41
[INFO] [stderr]    |
[INFO] [stderr] 16 | #[derive(Debug, Clone, Copy, Serialize, Deserialize)]
[INFO] [stderr]    |                                         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: message: unknown serde variant attribute `rename_as`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `overhead`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b8da3105b0972f2b227955abbed2a427b94c88c7398d1c8653af07d9a998a04b"`
[INFO] running `"docker" "rm" "-f" "b8da3105b0972f2b227955abbed2a427b94c88c7398d1c8653af07d9a998a04b"`
[INFO] [stdout] b8da3105b0972f2b227955abbed2a427b94c88c7398d1c8653af07d9a998a04b