[INFO] updating cached repository dholroyd/whatf
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/dholroyd/whatf
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/dholroyd/whatf" "work/ex/beta-1.38-1/sources/1.37.0/gh/dholroyd/whatf"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/dholroyd/whatf'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/dholroyd/whatf" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dholroyd/whatf"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dholroyd/whatf'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3c7b09a39cca1e940858236d6996e0687c94f04b
[INFO] sha for GitHub repo dholroyd/whatf: 3c7b09a39cca1e940858236d6996e0687c94f04b
[INFO] validating manifest of dholroyd/whatf 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 dholroyd/whatf 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 dholroyd/whatf
[INFO] finished frobbing dholroyd/whatf
[INFO] frobbed toml for dholroyd/whatf written to work/ex/beta-1.38-1/sources/1.37.0/gh/dholroyd/whatf/Cargo.toml
[INFO] started frobbing dholroyd/whatf
[INFO] finished frobbing dholroyd/whatf
[INFO] frobbed toml for dholroyd/whatf written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/dholroyd/whatf/Cargo.toml
[INFO] crate dholroyd/whatf 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 dholroyd/whatf 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/dholroyd/whatf:/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] 678ec680232bc5d422637799cf603aeb64ad5d42bb3c082f4494bc0c4c3fc4a9
[INFO] running `"docker" "start" "-a" "678ec680232bc5d422637799cf603aeb64ad5d42bb3c082f4494bc0c4c3fc4a9"`
[INFO] [stderr]    Compiling term v0.4.5
[INFO] [stderr]    Compiling quote v0.3.13
[INFO] [stderr]    Compiling openssl v0.9.7
[INFO] [stderr]    Compiling futures v0.1.11
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling lazycell v0.4.0
[INFO] [stderr]    Compiling ring v0.6.3
[INFO] [stderr]    Compiling bitflags v0.8.0
[INFO] [stderr]    Compiling md5 v0.3.3
[INFO] [stderr]    Compiling vec_map v0.7.0
[INFO] [stderr]    Compiling serde v0.9.12
[INFO] [stderr]    Compiling nom v2.1.0
[INFO] [stderr]    Compiling urlparse v0.7.3
[INFO] [stderr]    Compiling syntex_pos v0.54.0
[INFO] [stderr]    Compiling iovec v0.1.0
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling thread-id v3.0.0
[INFO] [stderr]    Compiling atty v0.2.2
[INFO] [stderr]    Compiling term_size v0.2.3
[INFO] [stderr]    Compiling openssl-sys v0.9.7
[INFO] [stderr]    Compiling miniz-sys v0.1.9
[INFO] [stderr]    Compiling net2 v0.2.27
[INFO] [stderr]    Compiling base64 v0.4.1
[INFO] [stderr]    Compiling xml-rs v0.1.26
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling bytes v0.4.1
[INFO] [stderr]    Compiling chan v0.1.19
[INFO] [stderr]    Compiling aho-corasick v0.6.2
[INFO] [stderr]    Compiling syn v0.11.9
[INFO] [stderr]    Compiling hyper v0.11.0-a.0 (https://github.com/hyperium/hyper.git#d63b7de4)
[INFO] [stderr]    Compiling idna v0.1.0
[INFO] [stderr]    Compiling num-bigint v0.1.35
[INFO] [stderr]    Compiling clap v2.22.0
[INFO] [stderr]    Compiling mio v0.6.6
[INFO] [stderr]    Compiling thread_local v0.3.2
[INFO] [stderr]    Compiling syntex_errors v0.54.0
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling futures-cpupool v0.1.5
[INFO] [stderr]    Compiling tokio-io v0.1.1
[INFO] [stderr]    Compiling serde_json v0.8.6
[INFO] [stderr]    Compiling num-rational v0.1.35
[INFO] [stderr]    Compiling regex v0.2.1
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling url v1.4.0
[INFO] [stderr]    Compiling serde_codegen_internals v0.11.3
[INFO] [stderr]    Compiling tokio-core v0.1.6
[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 flate2 v0.2.17
[INFO] [stderr]    Compiling toml v0.3.1
[INFO] [stderr]    Compiling num v0.1.36
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling serde_codegen_internals v0.14.2
[INFO] [stderr]    Compiling syntex_syntax v0.54.0
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling hdrsample v3.0.0
[INFO] [stderr]    Compiling hyper v0.10.5
[INFO] [stderr]    Compiling serde_urlencoded v0.3.0
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling serde_derive v0.9.12
[INFO] [stderr]    Compiling native-tls v0.1.1
[INFO] [stderr]    Compiling tokio-tls v0.1.2
[INFO] [stderr]    Compiling env_logger v0.4.2
[INFO] [stderr]    Compiling Inflector v0.6.0
[INFO] [stderr]    Compiling reqwest v0.3.0
[INFO] [stderr]    Compiling hyper-native-tls v0.2.2
[INFO] [stderr]    Compiling rusoto_credential v0.4.0
[INFO] [stderr]    Compiling hyper-tls v0.0.0 (https://github.com/hyperium/hyper-tls.git#74aefbe5)
[INFO] [stderr]    Compiling syntex v0.54.0
[INFO] [stderr]    Compiling serde_codegen v0.8.23
[INFO] [stderr]    Compiling rusoto_codegen v0.6.0
[INFO] [stderr] error[E0283]: type annotations required: cannot resolve `std::string::String: std::convert::AsRef<_>`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rusoto_codegen-0.6.0/src/generator/ec2.rs:443:94
[INFO] [stderr]     |
[INFO] [stderr] 443 |         let tag_name = capitalize_first(member.location_name.as_ref().unwrap_or(member_name).as_ref());
[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 E0283`.
[INFO] [stderr] error: Could not compile `rusoto_codegen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "678ec680232bc5d422637799cf603aeb64ad5d42bb3c082f4494bc0c4c3fc4a9"`
[INFO] running `"docker" "rm" "-f" "678ec680232bc5d422637799cf603aeb64ad5d42bb3c082f4494bc0c4c3fc4a9"`
[INFO] [stdout] 678ec680232bc5d422637799cf603aeb64ad5d42bb3c082f4494bc0c4c3fc4a9