[INFO] fetching crate vec_map 0.8.1...
[INFO] checking vec_map-0.8.1 against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] extracting crate vec_map 0.8.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate vec_map 0.8.1 on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate vec_map 0.8.1
[INFO] finished tweaking crates.io crate vec_map 0.8.1
[INFO] tweaked toml for crates.io crate vec_map 0.8.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9a3b54684d96c06944610f4ae569197032a72ab6354203948304e5a522663acd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "9a3b54684d96c06944610f4ae569197032a72ab6354203948304e5a522663acd"`
[INFO] [stderr]     Checking vec_map v0.8.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]     --> src/lib.rs:1010:34
[INFO] [stderr]      |
[INFO] [stderr] 1010 |     fn next(&mut self) -> Option<(&'a V)> { self.iter.next().map(|e| e.1) }
[INFO] [stderr]      |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]     --> src/lib.rs:1017:39
[INFO] [stderr]      |
[INFO] [stderr] 1017 |     fn next_back(&mut self) -> Option<(&'a V)> { self.iter.next_back().map(|e| e.1) }
[INFO] [stderr]      |                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]     --> src/lib.rs:1023:34
[INFO] [stderr]      |
[INFO] [stderr] 1023 |     fn next(&mut self) -> Option<(&'a mut V)> { self.iter_mut.next().map(|e| e.1) }
[INFO] [stderr]      |                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]     --> src/lib.rs:1010:34
[INFO] [stderr]      |
[INFO] [stderr] 1010 |     fn next(&mut self) -> Option<(&'a V)> { self.iter.next().map(|e| e.1) }
[INFO] [stderr]      |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]     --> src/lib.rs:1017:39
[INFO] [stderr]      |
[INFO] [stderr] 1017 |     fn next_back(&mut self) -> Option<(&'a V)> { self.iter.next_back().map(|e| e.1) }
[INFO] [stderr]      |                                       ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]     --> src/lib.rs:1023:34
[INFO] [stderr]      |
[INFO] [stderr] 1023 |     fn next(&mut self) -> Option<(&'a mut V)> { self.iter_mut.next().map(|e| e.1) }
[INFO] [stderr]      |                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "9a3b54684d96c06944610f4ae569197032a72ab6354203948304e5a522663acd"`
[INFO] running `"docker" "rm" "-f" "9a3b54684d96c06944610f4ae569197032a72ab6354203948304e5a522663acd"`
[INFO] [stdout] 9a3b54684d96c06944610f4ae569197032a72ab6354203948304e5a522663acd