[INFO] cloning repository https://github.com/mraof/mudengine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mraof/mudengine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmraof%2Fmudengine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmraof%2Fmudengine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c386a99b36d095dcb71b90ba4e9740eb62536491
[INFO] testing mraof/mudengine against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmraof%2Fmudengine" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mraof/mudengine on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mraof/mudengine
[INFO] finished tweaking git repo https://github.com/mraof/mudengine
[INFO] tweaked toml for git repo https://github.com/mraof/mudengine written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/mraof/mudengine already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded isatty v0.1.8
[INFO] [stderr]   Downloaded rmp v0.8.7
[INFO] [stderr]   Downloaded serdeconv v0.3.0
[INFO] [stderr]   Downloaded slog-term v2.4.0
[INFO] [stderr]   Downloaded term_size v0.3.1
[INFO] [stderr]   Downloaded tuple_utils v0.2.0
[INFO] [stderr]   Downloaded slog-scope v4.0.1
[INFO] [stderr]   Downloaded slog-async v2.3.0
[INFO] [stderr]   Downloaded shred v0.7.0
[INFO] [stderr]   Downloaded slog v2.2.3
[INFO] [stderr]   Downloaded chrono v0.4.3
[INFO] [stderr]   Downloaded shred-derive v0.5.0
[INFO] [stderr]   Downloaded serde v1.0.41
[INFO] [stderr]   Downloaded serde_derive_internals v0.23.1
[INFO] [stderr]   Downloaded rmp-serde v0.13.7
[INFO] [stderr]   Downloaded shrev v1.0.1
[INFO] [stderr]   Downloaded sloggers v0.2.7
[INFO] [stderr]   Downloaded slog-stdlog v3.0.2
[INFO] [stderr]   Downloaded serde_derive v1.0.41
[INFO] [stderr]   Downloaded serde_json v1.0.15
[INFO] [stderr]   Downloaded close_enough v0.2.1
[INFO] [stderr]   Downloaded trackable v0.2.17
[INFO] [stderr]   Downloaded hibitset v0.5.0
[INFO] [stderr]   Downloaded specs v0.11.2
[INFO] [stderr]   Downloaded ordermap v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85545f8b804b64a75dca7b08641df0981d54171f223020688ed8b48237710b4e
[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" "85545f8b804b64a75dca7b08641df0981d54171f223020688ed8b48237710b4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85545f8b804b64a75dca7b08641df0981d54171f223020688ed8b48237710b4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85545f8b804b64a75dca7b08641df0981d54171f223020688ed8b48237710b4e", kill_on_drop: false }`
[INFO] [stdout] 85545f8b804b64a75dca7b08641df0981d54171f223020688ed8b48237710b4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--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] 2a33edd2ec2fcbec33270044fc81144e84bcb8d3f18ff271a1c33cafc724305a
[INFO] running `Command { std: "docker" "start" "-a" "2a33edd2ec2fcbec33270044fc81144e84bcb8d3f18ff271a1c33cafc724305a", kill_on_drop: false }`
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling smallvec v0.6.2
[INFO] [stderr]    Compiling serde v1.0.41
[INFO] [stderr]    Compiling slog v2.2.3
[INFO] [stderr]    Compiling stable_deref_trait v1.1.0
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling trackable v0.2.17
[INFO] [stderr]    Compiling ordermap v0.4.1
[INFO] [stderr]    Compiling term_size v0.3.1
[INFO] [stderr]    Compiling isatty v0.1.8
[INFO] [stderr]    Compiling atty v0.2.8
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling proc-macro2 v0.3.6
[INFO] [stderr]    Compiling syn v0.10.8
[INFO] [stderr]    Compiling itertools v0.5.10
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling term v0.5.1
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling bytes v0.4.6
[INFO] [stderr]    Compiling textwrap v0.8.0
[INFO] [stderr]    Compiling owning_ref v0.3.3
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling parking_lot_core v0.2.14
[INFO] [stderr]    Compiling quote v0.5.1
[INFO] [stderr]    Compiling shred-derive v0.5.0
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr]    Compiling rmp v0.8.7
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling slog-async v2.3.0
[INFO] [stderr]    Compiling slog-scope v4.0.1
[INFO] [stderr]    Compiling clap v2.26.2
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling syn v0.13.1
[INFO] [stderr]    Compiling chrono v0.4.3
[INFO] [stderr]    Compiling parking_lot v0.5.5
[INFO] [stderr]    Compiling slog-stdlog v3.0.2
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "2a33edd2ec2fcbec33270044fc81144e84bcb8d3f18ff271a1c33cafc724305a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a33edd2ec2fcbec33270044fc81144e84bcb8d3f18ff271a1c33cafc724305a", kill_on_drop: false }`
[INFO] [stdout] 2a33edd2ec2fcbec33270044fc81144e84bcb8d3f18ff271a1c33cafc724305a