[INFO] crate halfbrown 0.1.10 is already in cache
[INFO] checking halfbrown-0.1.10 against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] extracting crate halfbrown 0.1.10 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate halfbrown 0.1.10 on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate halfbrown 0.1.10
[INFO] finished tweaking crates.io crate halfbrown 0.1.10
[INFO] tweaked toml for crates.io crate halfbrown 0.1.10 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ea7faa030b9ead1407e5810481efdaff6ec966b4c4d7d90aa614603f6eeba604
[INFO] running `"docker" "start" "-a" "ea7faa030b9ead1407e5810481efdaff6ec966b4c4d7d90aa614603f6eeba604"`
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]     Checking criterion-plot v0.4.0
[INFO] [stderr]     Checking criterion v0.3.0
[INFO] [stderr]    Compiling const-random-macro v0.1.6
[INFO] [stderr]     Checking const-random v0.1.6
[INFO] [stderr]     Checking ahash v0.2.18
[INFO] [stderr]     Checking hashbrown v0.6.3
[INFO] [stderr]     Checking halfbrown v0.1.10 (/opt/rustwide/workdir)
[INFO] [stderr] error: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:917:34
[INFO] [stderr]     |
[INFO] [stderr] 917 |     fn next(&mut self) -> Option<(&'a K)> {
[INFO] [stderr]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:21:11
[INFO] [stderr]     |
[INFO] [stderr] 21  | #![forbid(warnings)]
[INFO] [stderr]     |           ^^^^^^^^
[INFO] [stderr]     = note: `#[forbid(unused_parens)]` implied by `#[forbid(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] error: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:935:34
[INFO] [stderr]     |
[INFO] [stderr] 935 |     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stderr]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] error: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:954:34
[INFO] [stderr]     |
[INFO] [stderr] 954 |     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stderr]     |                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] error: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:917:34
[INFO] [stderr]     |
[INFO] [stderr] 917 |     fn next(&mut self) -> Option<(&'a K)> {
[INFO] [stderr]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:21:11
[INFO] [stderr]     |
[INFO] [stderr] 21  | #![forbid(warnings)]
[INFO] [stderr]     |           ^^^^^^^^
[INFO] [stderr]     = note: `#[forbid(unused_parens)]` implied by `#[forbid(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] error: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:935:34
[INFO] [stderr]     |
[INFO] [stderr] 935 |     fn next(&mut self) -> Option<(&'a V)> {
[INFO] [stderr]     |                                  ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] error: unnecessary parentheses around type
[INFO] [stderr]    --> src/lib.rs:954:34
[INFO] [stderr]     |
[INFO] [stderr] 954 |     fn next(&mut self) -> Option<(&'a mut V)> {
[INFO] [stderr]     |                                  ^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `halfbrown`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `halfbrown`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "ea7faa030b9ead1407e5810481efdaff6ec966b4c4d7d90aa614603f6eeba604"`
[INFO] running `"docker" "rm" "-f" "ea7faa030b9ead1407e5810481efdaff6ec966b4c4d7d90aa614603f6eeba604"`
[INFO] [stdout] ea7faa030b9ead1407e5810481efdaff6ec966b4c4d7d90aa614603f6eeba604