[INFO] cloning repository https://github.com/rukai/flashcards
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rukai/flashcards" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frukai%2Fflashcards", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frukai%2Fflashcards'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 70e920c00c1e561067f07818576698bb32a43d33
[INFO] checking rukai/flashcards against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frukai%2Fflashcards" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rukai/flashcards on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-2/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/rukai/flashcards
[INFO] finished tweaking git repo https://github.com/rukai/flashcards
[INFO] tweaked toml for git repo https://github.com/rukai/flashcards written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/rukai/flashcards already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 449254864ce0e28798e76cc9d3b8fe5a38cc768721df927017ab3d22a1bcf385
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "449254864ce0e28798e76cc9d3b8fe5a38cc768721df927017ab3d22a1bcf385", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "449254864ce0e28798e76cc9d3b8fe5a38cc768721df927017ab3d22a1bcf385", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "449254864ce0e28798e76cc9d3b8fe5a38cc768721df927017ab3d22a1bcf385", kill_on_drop: false }`
[INFO] [stdout] 449254864ce0e28798e76cc9d3b8fe5a38cc768721df927017ab3d22a1bcf385
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7867e86358f40d78c5f6c68961822eb86cd2c7992f1940c0bceef537f0a67e12
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7867e86358f40d78c5f6c68961822eb86cd2c7992f1940c0bceef537f0a67e12", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.3
[INFO] [stderr]     Checking matches v0.1.6
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking httparse v1.2.4
[INFO] [stderr]     Checking pest v0.3.3
[INFO] [stderr]    Compiling proc-macro2 v0.4.6
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking base64 v0.9.2
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking serde_json v1.0.21
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]    Compiling pear_codegen v0.0.17
[INFO] [stderr]    Compiling rocket v0.3.13
[INFO] [stderr]    Compiling rocket_codegen v0.3.13
[INFO] [stderr]     Checking idna v0.1.4
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]     Checking regex v0.2.11
[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-1.7.0/src/form_urlencoded.rs:261:40
[INFO] [stdout]     |
[INFO] [stdout] 259 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stdout]     |      -- lifetime `'a` defined here
[INFO] [stdout] 260 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stdout] 261 |     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] [stderr]    Compiling syn v0.14.2
[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] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7867e86358f40d78c5f6c68961822eb86cd2c7992f1940c0bceef537f0a67e12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7867e86358f40d78c5f6c68961822eb86cd2c7992f1940c0bceef537f0a67e12", kill_on_drop: false }`
[INFO] [stdout] 7867e86358f40d78c5f6c68961822eb86cd2c7992f1940c0bceef537f0a67e12