[INFO] fetching crate high_mem_utils 0.2.6...
[INFO] checking high_mem_utils-0.2.6 against try#a243773eaf3fedcd203f10ae4579e4f106bf7ccd for pr-68325
[INFO] extracting crate high_mem_utils 0.2.6 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate high_mem_utils 0.2.6 on toolchain a243773eaf3fedcd203f10ae4579e4f106bf7ccd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate high_mem_utils 0.2.6
[INFO] finished tweaking crates.io crate high_mem_utils 0.2.6
[INFO] tweaked toml for crates.io crate high_mem_utils 0.2.6 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "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] 0fedb0d0325491b5c40ed12c7a1d25cdfea6ca29d9b5beb68a1d796b62a5e325
[INFO] running `"docker" "start" "-a" "0fedb0d0325491b5c40ed12c7a1d25cdfea6ca29d9b5beb68a1d796b62a5e325"`
[INFO] [stderr]     Checking high_mem_utils v0.2.6 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/lib.rs:606:32
[INFO] [stderr]     |
[INFO] [stderr] 606 |         let mut_ref = unsafe { (&mut *self.cache.as_mut_ptr()) };
[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 block return value
[INFO] [stderr]    --> src/lib.rs:606:32
[INFO] [stderr]     |
[INFO] [stderr] 606 |         let mut_ref = unsafe { (&mut *self.cache.as_mut_ptr()) };
[INFO] [stderr]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `manually_drop_take` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:2:49
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(vec_leak, untagged_unions, const_fn, manually_drop_take)]
[INFO] [stderr]   |                                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `manually_drop_take` has been stable since 1.42.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:2:49
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(vec_leak, untagged_unions, const_fn, manually_drop_take)]
[INFO] [stderr]   |                                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `"docker" "inspect" "0fedb0d0325491b5c40ed12c7a1d25cdfea6ca29d9b5beb68a1d796b62a5e325"`
[INFO] running `"docker" "rm" "-f" "0fedb0d0325491b5c40ed12c7a1d25cdfea6ca29d9b5beb68a1d796b62a5e325"`
[INFO] [stdout] 0fedb0d0325491b5c40ed12c7a1d25cdfea6ca29d9b5beb68a1d796b62a5e325