[INFO] fetching crate scryer-prolog 0.8.118...
[INFO] checking scryer-prolog-0.8.118 against try#13f916f63bc6575d5ff1f989237dfabe88981368 for pr-69880
[INFO] extracting crate scryer-prolog 0.8.118 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate scryer-prolog 0.8.118 on toolchain 13f916f63bc6575d5ff1f989237dfabe88981368
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate scryer-prolog 0.8.118
[INFO] finished tweaking crates.io crate scryer-prolog 0.8.118
[INFO] tweaked toml for crates.io crate scryer-prolog 0.8.118 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate scryer-prolog 0.8.118 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "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" "+13f916f63bc6575d5ff1f989237dfabe88981368" "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] 07be99d35a44989bed1be624564c049abda4e2b94cba9096fdf133c773e1bf40
[INFO] running `"docker" "start" "-a" "07be99d35a44989bed1be624564c049abda4e2b94cba9096fdf133c773e1bf40"`
[INFO] [stderr]     Checking cfg-if v0.1.7
[INFO] [stderr]    Compiling rug v1.5.2
[INFO] [stderr]    Compiling indexmap v1.1.0
[INFO] [stderr]     Checking downcast v0.10.0
[INFO] [stderr]     Checking ref_thread_local v0.0.0
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]     Checking stackvector v1.0.2
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking unicode_reader v1.0.0
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking nix v0.15.0
[INFO] [stderr]     Checking ordered-float v0.5.2
[INFO] [stderr]     Checking lexical-core v0.4.0
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]    Compiling scryer-prolog v0.8.118 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking lexical v2.1.0
[INFO] [stderr]    Compiling gmp-mpfr-sys v1.1.14
[INFO] [stderr]     Checking rustyline v5.0.3
[INFO] [stderr]     Checking prolog_parser v0.8.40
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/prolog/heap_print.rs:409:13
[INFO] [stderr]     |
[INFO] [stderr] 409 |             (iter.next() == Some(']') && iter.next().is_none())
[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/prolog/heap_print.rs:411:13
[INFO] [stderr]     |
[INFO] [stderr] 411 |             (iter.next() == Some('}') && iter.next().is_none())
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/prolog/heap_print.rs:409:13
[INFO] [stderr]     |
[INFO] [stderr] 409 |             (iter.next() == Some(']') && iter.next().is_none())
[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/prolog/heap_print.rs:411:13
[INFO] [stderr]     |
[INFO] [stderr] 411 |             (iter.next() == Some('}') && iter.next().is_none())
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `reset`
[INFO] [stderr]    --> src/prolog/machine/mod.rs:295:5
[INFO] [stderr]     |
[INFO] [stderr] 295 |     pub fn reset(&mut self) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4m 52s
[INFO] running `"docker" "inspect" "07be99d35a44989bed1be624564c049abda4e2b94cba9096fdf133c773e1bf40"`
[INFO] running `"docker" "rm" "-f" "07be99d35a44989bed1be624564c049abda4e2b94cba9096fdf133c773e1bf40"`
[INFO] [stdout] 07be99d35a44989bed1be624564c049abda4e2b94cba9096fdf133c773e1bf40