[INFO] updating cached repository anyley/test_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/anyley/test_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/anyley/test_rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/anyley/test_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/anyley/test_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/anyley/test_rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/anyley/test_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/anyley/test_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3e096cdc56009828c864f35c472cebaa50644f20
[INFO] sha for GitHub repo anyley/test_rust: 3e096cdc56009828c864f35c472cebaa50644f20
[INFO] validating manifest of anyley/test_rust 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 anyley/test_rust 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 anyley/test_rust
[INFO] finished frobbing anyley/test_rust
[INFO] frobbed toml for anyley/test_rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/anyley/test_rust/Cargo.toml
[INFO] started frobbing anyley/test_rust
[INFO] finished frobbing anyley/test_rust
[INFO] frobbed toml for anyley/test_rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/anyley/test_rust/Cargo.toml
[INFO] crate anyley/test_rust 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 anyley/test_rust 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-6/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/anyley/test_rust:/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] fb70ad9dffeff8f2dfd94e26acaac5cf7879022b3b590fe7ba5e92066d4ec777
[INFO] running `"docker" "start" "-a" "fb70ad9dffeff8f2dfd94e26acaac5cf7879022b3b590fe7ba5e92066d4ec777"`
[INFO] [stderr]    Compiling linked-hash-map v0.5.0
[INFO] [stderr]    Compiling url v1.5.1
[INFO] [stderr]    Compiling yaml-rust v0.3.8 (https://github.com/chyh1990/yaml-rust.git#ed850190)
[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-1.5.1/src/form_urlencoded.rs:251:40
[INFO] [stderr]     |
[INFO] [stderr] 249 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 250 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 251 |     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 ws v0.7.3
[INFO] [stderr]    Compiling server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.23s
[INFO] running `"docker" "inspect" "fb70ad9dffeff8f2dfd94e26acaac5cf7879022b3b590fe7ba5e92066d4ec777"`
[INFO] running `"docker" "rm" "-f" "fb70ad9dffeff8f2dfd94e26acaac5cf7879022b3b590fe7ba5e92066d4ec777"`
[INFO] [stdout] fb70ad9dffeff8f2dfd94e26acaac5cf7879022b3b590fe7ba5e92066d4ec777
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/anyley/test_rust:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 214ab28f89a115b4cbd5b4dd5f591e9bc33231b994d88f046624804b0e7c1494
[INFO] running `"docker" "start" "-a" "214ab28f89a115b4cbd5b4dd5f591e9bc33231b994d88f046624804b0e7c1494"`
[INFO] [stderr]    Compiling server v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "214ab28f89a115b4cbd5b4dd5f591e9bc33231b994d88f046624804b0e7c1494"`
[INFO] running `"docker" "rm" "-f" "214ab28f89a115b4cbd5b4dd5f591e9bc33231b994d88f046624804b0e7c1494"`
[INFO] [stdout] 214ab28f89a115b4cbd5b4dd5f591e9bc33231b994d88f046624804b0e7c1494
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/anyley/test_rust:/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" "test" "--frozen"`
[INFO] [stdout] 7aeca1a5ffb0b61c3f6603e58b6a4a6e4b67ec3426483360bacf0687d1d9443d
[INFO] running `"docker" "start" "-a" "7aeca1a5ffb0b61c3f6603e58b6a4a6e4b67ec3426483360bacf0687d1d9443d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/server-6299765c7ea6105d
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "7aeca1a5ffb0b61c3f6603e58b6a4a6e4b67ec3426483360bacf0687d1d9443d"`
[INFO] running `"docker" "rm" "-f" "7aeca1a5ffb0b61c3f6603e58b6a4a6e4b67ec3426483360bacf0687d1d9443d"`
[INFO] [stdout] 7aeca1a5ffb0b61c3f6603e58b6a4a6e4b67ec3426483360bacf0687d1d9443d