[INFO] cloning repository https://github.com/polybuildr/balloon-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/polybuildr/balloon-lang" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpolybuildr%2Fballoon-lang", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpolybuildr%2Fballoon-lang'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7580baa303546675c19fc3ef9c1202f179209bce
[INFO] checking polybuildr/balloon-lang against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpolybuildr%2Fballoon-lang" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/polybuildr/balloon-lang on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/polybuildr/balloon-lang
[INFO] finished tweaking git repo https://github.com/polybuildr/balloon-lang
[INFO] tweaked toml for git repo https://github.com/polybuildr/balloon-lang written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/polybuildr/balloon-lang already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c516ede42913cd775826a82b49ba3a09e2cca16bc80efb7b549c91231ce31dcc
[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" "c516ede42913cd775826a82b49ba3a09e2cca16bc80efb7b549c91231ce31dcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c516ede42913cd775826a82b49ba3a09e2cca16bc80efb7b549c91231ce31dcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c516ede42913cd775826a82b49ba3a09e2cca16bc80efb7b549c91231ce31dcc", kill_on_drop: false }`
[INFO] [stdout] c516ede42913cd775826a82b49ba3a09e2cca16bc80efb7b549c91231ce31dcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fd7d73aeb06cb3aa992098634b6add8ba08392a4c703dd624eccf904ee948c23
[INFO] running `Command { std: "docker" "start" "-a" "fd7d73aeb06cb3aa992098634b6add8ba08392a4c703dd624eccf904ee948c23", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.28
[INFO] [stderr]     Checking matches v0.1.6
[INFO] [stderr]    Compiling version_check v0.1.3
[INFO] [stderr]     Checking unicode-normalization v0.1.5
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking log v0.3.8
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]     Checking percent-encoding v1.0.0
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking httparse v1.2.3
[INFO] [stderr]     Checking encode_unicode v0.1.3
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]     Checking fnv v1.0.5
[INFO] [stderr]     Checking linear-map v1.2.0
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking base64 v0.5.2
[INFO] [stderr]    Compiling peg v0.5.4
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking num_cpus v1.6.2
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking idna v0.1.4
[INFO] [stderr]    Compiling balloon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking url v1.5.1
[INFO] [stderr]     Checking rustyline v1.0.0
[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-1.5.1/src/form_urlencoded.rs:251:40
[INFO] [stdout]     |
[INFO] [stdout] 249 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stdout]     |      -- lifetime `'a` defined here
[INFO] [stdout] 250 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stdout] 251 |     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" "fd7d73aeb06cb3aa992098634b6add8ba08392a4c703dd624eccf904ee948c23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd7d73aeb06cb3aa992098634b6add8ba08392a4c703dd624eccf904ee948c23", kill_on_drop: false }`
[INFO] [stdout] fd7d73aeb06cb3aa992098634b6add8ba08392a4c703dd624eccf904ee948c23