[INFO] cloning repository https://github.com/toidiu/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/toidiu/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoidiu%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoidiu%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 264e3ae49b468ef800d221a8d62a583fda5f9212
[INFO] checking toidiu/learn-rust against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftoidiu%2Flearn-rust" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/toidiu/learn-rust on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/toidiu/learn-rust
[INFO] finished tweaking git repo https://github.com/toidiu/learn-rust
[INFO] tweaked toml for git repo https://github.com/toidiu/learn-rust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/toidiu/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-timer v0.2.0
[INFO] [stderr]   Downloaded hyper v0.11.24
[INFO] [stderr]   Downloaded tokio-core v0.1.16
[INFO] [stderr]   Downloaded futures v0.1.20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 611db2130166aeaab1dad7876e8c29b69eeb6a3a0727c65086528c3f71a85903
[INFO] running `Command { std: "docker" "start" "-a" "611db2130166aeaab1dad7876e8c29b69eeb6a3a0727c65086528c3f71a85903", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "611db2130166aeaab1dad7876e8c29b69eeb6a3a0727c65086528c3f71a85903", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "611db2130166aeaab1dad7876e8c29b69eeb6a3a0727c65086528c3f71a85903", kill_on_drop: false }`
[INFO] [stdout] 611db2130166aeaab1dad7876e8c29b69eeb6a3a0727c65086528c3f71a85903
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ebf02af3a3b16cac8529426e1702f3ffe420c4f8f96e6af8b589a6c704808d7
[INFO] running `Command { std: "docker" "start" "-a" "0ebf02af3a3b16cac8529426e1702f3ffe420c4f8f96e6af8b589a6c704808d7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]     Checking futures v0.1.20
[INFO] [stderr]     Checking lazycell v0.6.0
[INFO] [stderr]    Compiling cc v1.0.9
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]     Checking scoped-tls v0.1.1
[INFO] [stderr]     Checking httparse v1.2.4
[INFO] [stderr]     Checking serde v1.0.36
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]     Checking itoa v0.4.1
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling crc v1.7.0
[INFO] [stderr]     Checking base64 v0.9.0
[INFO] [stderr]     Checking encoding_rs v0.7.2
[INFO] [stderr]     Checking url v1.7.0
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]     Checking libflate v0.1.14
[INFO] [stderr]     Checking crossbeam-epoch v0.4.1
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking net2 v0.2.32
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]     Checking crossbeam-deque v0.3.0
[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] [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" "0ebf02af3a3b16cac8529426e1702f3ffe420c4f8f96e6af8b589a6c704808d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ebf02af3a3b16cac8529426e1702f3ffe420c4f8f96e6af8b589a6c704808d7", kill_on_drop: false }`
[INFO] [stdout] 0ebf02af3a3b16cac8529426e1702f3ffe420c4f8f96e6af8b589a6c704808d7