[INFO] updating cached repository cesare/rust-list-ec2-instances
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/cesare/rust-list-ec2-instances
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/cesare/rust-list-ec2-instances" "work/ex/beta-1.37-6/sources/1.36.0/gh/cesare/rust-list-ec2-instances"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/cesare/rust-list-ec2-instances'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/cesare/rust-list-ec2-instances" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cesare/rust-list-ec2-instances"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cesare/rust-list-ec2-instances'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d108bc60553fd2046d4c98db1a0300a6dde2fdb2
[INFO] sha for GitHub repo cesare/rust-list-ec2-instances: d108bc60553fd2046d4c98db1a0300a6dde2fdb2
[INFO] validating manifest of cesare/rust-list-ec2-instances on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of cesare/rust-list-ec2-instances on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing cesare/rust-list-ec2-instances
[INFO] finished frobbing cesare/rust-list-ec2-instances
[INFO] frobbed toml for cesare/rust-list-ec2-instances written to work/ex/beta-1.37-6/sources/1.36.0/gh/cesare/rust-list-ec2-instances/Cargo.toml
[INFO] started frobbing cesare/rust-list-ec2-instances
[INFO] finished frobbing cesare/rust-list-ec2-instances
[INFO] frobbed toml for cesare/rust-list-ec2-instances written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cesare/rust-list-ec2-instances/Cargo.toml
[INFO] crate cesare/rust-list-ec2-instances already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing cesare/rust-list-ec2-instances against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/cesare/rust-list-ec2-instances:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 2d7a83bf88624828bfb39af2c457a475a53c3c20be4c04609e88f563c9ec2b6f
[INFO] running `"docker" "start" "-a" "2d7a83bf88624828bfb39af2c457a475a53c3c20be4c04609e88f563c9ec2b6f"`
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling slab v0.4.0
[INFO] [stderr]    Compiling futures v0.1.23
[INFO] [stderr]    Compiling lazycell v0.6.0
[INFO] [stderr]    Compiling itoa v0.4.2
[INFO] [stderr]    Compiling fnv v1.0.6
[INFO] [stderr]    Compiling bitflags v0.9.1
[INFO] [stderr]    Compiling string v0.1.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling indexmap v1.0.1
[INFO] [stderr]    Compiling matches v0.1.6
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling serde v1.0.30
[INFO] [stderr]    Compiling utf8-ranges v1.0.0
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling safemem v0.2.0
[INFO] [stderr]    Compiling md5 v0.3.7
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling dirs v1.0.3
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling base64 v0.9.0
[INFO] [stderr]    Compiling regex-syntax v0.5.2
[INFO] [stderr]    Compiling bytes v0.4.9
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling getopts v0.2.18
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.0
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling http v0.1.10
[INFO] [stderr]    Compiling idna v0.1.4
[INFO] [stderr]    Compiling crossbeam-deque v0.3.0
[INFO] [stderr]    Compiling rustc_version v0.2.2
[INFO] [stderr]    Compiling sha2 v0.7.0
[INFO] [stderr]    Compiling tokio-io v0.1.6
[INFO] [stderr]    Compiling tokio-executor v0.1.3
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling want v0.0.6
[INFO] [stderr]    Compiling rusoto_core v0.33.1
[INFO] [stderr]    Compiling tokio-threadpool v0.1.5
[INFO] [stderr]    Compiling tokio-timer v0.2.5
[INFO] [stderr]    Compiling tokio-reactor v0.1.3
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr]    Compiling tokio-tcp v0.1.1
[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-udp v0.1.0
[INFO] [stderr]    Compiling tokio-fs v0.1.3
[INFO] [stderr]    Compiling h2 v0.1.12
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling serde_json v1.0.11
[INFO] [stderr]    Compiling tokio v0.1.7
[INFO] [stderr]    Compiling regex v0.2.8
[INFO] [stderr]    Compiling tokio-core v0.1.15
[INFO] [stderr]    Compiling hyper v0.12.7
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling hyper-tls v0.2.1
[INFO] [stderr]    Compiling rusoto_credential v0.12.0
[INFO] [stderr]    Compiling rusoto_ec2 v0.33.1
[INFO] [stderr] error: Could not compile `rusoto_ec2`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name rusoto_ec2 /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rusoto_ec2-0.33.1/src/lib.rs --color never --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 -C metadata=ba147bc9f56ec711 -C extra-filename=-ba147bc9f56ec711 --out-dir /opt/crater/target/debug/deps -L dependency=/opt/crater/target/debug/deps --extern futures=/opt/crater/target/debug/deps/libfutures-01cd9098611801c4.rlib --extern rusoto_core=/opt/crater/target/debug/deps/librusoto_core-db5116bbeb217398.rlib --extern xml=/opt/crater/target/debug/deps/libxml-acfebac1c0608481.rlib --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "2d7a83bf88624828bfb39af2c457a475a53c3c20be4c04609e88f563c9ec2b6f"`
[INFO] running `"docker" "rm" "-f" "2d7a83bf88624828bfb39af2c457a475a53c3c20be4c04609e88f563c9ec2b6f"`
[INFO] [stdout] 2d7a83bf88624828bfb39af2c457a475a53c3c20be4c04609e88f563c9ec2b6f