[INFO] fetching crate ruroonga_client 0.5.1...
[INFO] testing ruroonga_client-0.5.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate ruroonga_client 0.5.1 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate ruroonga_client 0.5.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ruroonga_client 0.5.1
[INFO] finished tweaking crates.io crate ruroonga_client 0.5.1
[INFO] tweaked toml for crates.io crate ruroonga_client 0.5.1 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded json_flex v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b257860c3015a91f508bc9961de8ccc0d0b6b76cfde3b67db09a0fd3810c9c6f
[INFO] running `Command { std: "docker" "start" "-a" "b257860c3015a91f508bc9961de8ccc0d0b6b76cfde3b67db09a0fd3810c9c6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b257860c3015a91f508bc9961de8ccc0d0b6b76cfde3b67db09a0fd3810c9c6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b257860c3015a91f508bc9961de8ccc0d0b6b76cfde3b67db09a0fd3810c9c6f", kill_on_drop: false }`
[INFO] [stdout] b257860c3015a91f508bc9961de8ccc0d0b6b76cfde3b67db09a0fd3810c9c6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6dd678ad1e9adf59558a169871a22c0dbd9c8872409cc65d12fed6ba29f6d962
[INFO] running `Command { std: "docker" "start" "-a" "6dd678ad1e9adf59558a169871a22c0dbd9c8872409cc65d12fed6ba29f6d962", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]    Compiling json_flex v0.3.3
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling url v1.2.4
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stdout] error[E0713]: borrow may still be in use when destructor runs
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.2.4/src/form_urlencoded.rs:246:40
[INFO] [stdout]     |
[INFO] [stdout] 244 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stdout]     |      -- lifetime `'a` defined here
[INFO] [stdout] 245 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stdout] 246 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stdout]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stdout]     |                                        |
[INFO] [stdout]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0713`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `url` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "6dd678ad1e9adf59558a169871a22c0dbd9c8872409cc65d12fed6ba29f6d962", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6dd678ad1e9adf59558a169871a22c0dbd9c8872409cc65d12fed6ba29f6d962", kill_on_drop: false }`
[INFO] [stdout] 6dd678ad1e9adf59558a169871a22c0dbd9c8872409cc65d12fed6ba29f6d962