[INFO] fetching crate quickercheck 0.2.0...
[INFO] documenting quickercheck-0.2.0 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate quickercheck 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate quickercheck 0.2.0 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate quickercheck 0.2.0
[INFO] finished tweaking crates.io crate quickercheck 0.2.0
[INFO] tweaked toml for crates.io crate quickercheck 0.2.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f10227cd442764216faaadff2979c323b1ebf6880e6a4f2f901e72415ed3911
[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" "3f10227cd442764216faaadff2979c323b1ebf6880e6a4f2f901e72415ed3911", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f10227cd442764216faaadff2979c323b1ebf6880e6a4f2f901e72415ed3911", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f10227cd442764216faaadff2979c323b1ebf6880e6a4f2f901e72415ed3911", kill_on_drop: false }`
[INFO] [stdout] 3f10227cd442764216faaadff2979c323b1ebf6880e6a4f2f901e72415ed3911
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "RUSTDOCFLAGS=--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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19e4332f59787c826ea9d19ee872314bc438b38000e5070f1ea410ea0f163403
[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" "19e4332f59787c826ea9d19ee872314bc438b38000e5070f1ea410ea0f163403", kill_on_drop: false }`
[INFO] [stderr]  Documenting quickercheck v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:102:67
[INFO] [stdout]     |
[INFO] [stdout] 102 |                   where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout]     |                                                                     ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:102:108
[INFO] [stdout]     |
[INFO] [stdout] 102 |                   where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout]     |                                                                                                              ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:104:88
[INFO] [stdout]     |
[INFO] [stdout] 104 |                   type Generator = FromIteratorGenerator<$container<$($placeholder),*>, <($($placeholder),*) as Arbitrary>::Generator>;
[INFO] [stdout]     |                                                                                          ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:105:84
[INFO] [stdout]     |
[INFO] [stdout] 105 |                   type Shrink = FromIteratorShrinker<$container<$($placeholder),*>, <($($placeholder),*) as Arbitrary>::Shrink>;
[INFO] [stdout]     |                                                                                      ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/arbitrary.rs:102:67
[INFO] [stdout]     |
[INFO] [stdout] 102 |                   where $container<$($placeholder),*>: FromIterator<($($placeholder),*)> + IntoIterator<Item=($($placeholder),*)>
[INFO] [stdout]     |                                                                     ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] ...
[INFO] [stdout] 119 | / generic_impls! {
[INFO] [stdout] 120 | |     Vec<T>,
[INFO] [stdout] 121 | |     BTreeMap<K, V>,
[INFO] [stdout] 122 | |     BTreeSet<T>,
[INFO] [stdout] ...   |
[INFO] [stdout] 127 | |     VecDeque<T>
[INFO] [stdout] 128 | | }
[INFO] [stdout]     | |_- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.83s
[INFO] running `Command { std: "docker" "inspect" "19e4332f59787c826ea9d19ee872314bc438b38000e5070f1ea410ea0f163403", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19e4332f59787c826ea9d19ee872314bc438b38000e5070f1ea410ea0f163403", kill_on_drop: false }`
[INFO] [stdout] 19e4332f59787c826ea9d19ee872314bc438b38000e5070f1ea410ea0f163403