[INFO] fetching crate safe_thing 0.0.3...
[INFO] testing safe_thing-0.0.3 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate safe_thing 0.0.3 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate safe_thing 0.0.3 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 crates.io crate safe_thing 0.0.3
[INFO] finished tweaking crates.io crate safe_thing 0.0.3
[INFO] tweaked toml for crates.io crate safe_thing 0.0.3 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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] 40117c86ce154dd676e0b13c6de837d35e05357e0748408fd6d94d9638b42f5c
[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" "40117c86ce154dd676e0b13c6de837d35e05357e0748408fd6d94d9638b42f5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40117c86ce154dd676e0b13c6de837d35e05357e0748408fd6d94d9638b42f5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40117c86ce154dd676e0b13c6de837d35e05357e0748408fd6d94d9638b42f5c", kill_on_drop: false }`
[INFO] [stdout] 40117c86ce154dd676e0b13c6de837d35e05357e0748408fd6d94d9638b42f5c
[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] [stdout] 1b07d7a4f697f9b8e7a9d03966f88450ac30f09b3b08eb4602ed7e33e3383047
[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" "1b07d7a4f697f9b8e7a9d03966f88450ac30f09b3b08eb4602ed7e33e3383047", kill_on_drop: false }`
[INFO] [stderr]    Compiling lazy_static v1.0.2
[INFO] [stderr]    Compiling byteorder v1.1.0
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]    Compiling unwrap v1.2.1
[INFO] [stderr]    Compiling podio v0.1.7
[INFO] [stderr]    Compiling safemem v0.3.3
[INFO] [stderr]    Compiling unicode-segmentation v1.1.0
[INFO] [stderr]    Compiling crossbeam v0.2.12
[INFO] [stderr]    Compiling slab v0.3.0
[INFO] [stderr]    Compiling ansi_term v0.9.0
[INFO] [stderr]    Compiling sha1 v0.2.0
[INFO] [stderr]    Compiling antidote v1.0.0
[INFO] [stderr]    Compiling tiny-keccak v1.3.1
[INFO] [stderr]    Compiling c_linked_list v1.1.1
[INFO] [stderr]    Compiling rustfmt v0.10.0
[INFO] [stderr]    Compiling fake_clock v0.2.0
[INFO] [stderr]    Compiling cesu8 v1.1.0
[INFO] [stderr]    Compiling alloc-no-stdlib v1.2.0
[INFO] [stderr]    Compiling jni-sys v0.3.0
[INFO] [stderr]    Compiling lru_time_cache v0.8.1
[INFO] [stderr]    Compiling data-encoding v2.1.2
[INFO] [stderr]    Compiling crossbeam-utils v0.6.3
[INFO] [stderr]    Compiling miniz-sys v0.1.12
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]    Compiling walkdir v2.0.1
[INFO] [stderr]    Compiling xml-rs v0.3.6
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling tokio-trace-core v0.1.0
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling brotli-decompressor v1.3.0
[INFO] [stderr]    Compiling base64 v0.9.3
[INFO] [stderr]    Compiling tokio-executor v0.1.9
[INFO] [stderr]    Compiling filetime v0.2.13
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr]    Compiling term_size v0.3.2
[INFO] [stderr]    Compiling termion v1.4.0
[INFO] [stderr]    Compiling get_if_addrs v0.4.1
[INFO] [stderr]    Compiling memmap v0.5.2
[INFO] [stderr]    Compiling extprim v1.7.1
[INFO] [stderr]    Compiling combine v3.8.1
[INFO] [stderr]    Compiling libflate v0.1.27
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling msdos_time v0.1.6
[INFO] [stderr]    Compiling strings v0.1.1
[INFO] [stderr]    Compiling tokio-timer v0.2.12
[INFO] [stderr]    Compiling tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling ordered-float v1.1.1
[INFO] [stderr]    Compiling openssl v0.10.32
[INFO] [stderr]    Compiling flate2 v1.0.19
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling regex v1.4.2
[INFO] [stderr]    Compiling tar v0.4.30
[INFO] [stderr]    Compiling textwrap v0.6.0
[INFO] [stderr]    Compiling crossbeam-channel v0.3.7
[INFO] [stderr]    Compiling digest v0.7.6
[INFO] [stderr]    Compiling url v1.5.1
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/context.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use crossbeam_utils::Backoff;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/flavors/array.rs:23:23
[INFO] [stdout]    |
[INFO] [stdout] 23 | use crossbeam_utils::{Backoff, CachePadded};
[INFO] [stdout]    |                       ^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/flavors/list.rs:10:23
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crossbeam_utils::{Backoff, CachePadded};
[INFO] [stdout]    |                       ^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/flavors/zero.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crossbeam_utils::Backoff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/select.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crossbeam_utils::Backoff;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_utils::Backoff`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/crossbeam-channel-0.3.7/src/utils.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use crossbeam_utils::Backoff;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ no `Backoff` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling jni v0.10.2
[INFO] [stderr]    Compiling xmltree v0.3.2
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `crossbeam-channel`
[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] [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: build failed
[INFO] running `Command { std: "docker" "inspect" "1b07d7a4f697f9b8e7a9d03966f88450ac30f09b3b08eb4602ed7e33e3383047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b07d7a4f697f9b8e7a9d03966f88450ac30f09b3b08eb4602ed7e33e3383047", kill_on_drop: false }`
[INFO] [stdout] 1b07d7a4f697f9b8e7a9d03966f88450ac30f09b3b08eb4602ed7e33e3383047