[INFO] fetching crate math-calc 0.1.0...
[INFO] checking math-calc-0.1.0 against master#bd0bacc694d7d8175804bb6f690cb846bfa4a9ee for pr-71665
[INFO] extracting crate math-calc 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate math-calc 0.1.0 on toolchain bd0bacc694d7d8175804bb6f690cb846bfa4a9ee
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate math-calc 0.1.0
[INFO] finished tweaking crates.io crate math-calc 0.1.0
[INFO] tweaked toml for crates.io crate math-calc 0.1.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 56be843237157b0e90e1c73b83a03c4788abfdf90794c80cf6473513c4b08edd
[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" "56be843237157b0e90e1c73b83a03c4788abfdf90794c80cf6473513c4b08edd"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling serde v1.0.109
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]    Compiling serde_derive v1.0.109
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling ena v0.13.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling sha2 v0.8.1
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.17.2
[INFO] [stderr]    Compiling math-calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:995:5
[INFO] [stderr]     |
[INFO] [stderr] 995 |     (__0)
[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]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1006:5
[INFO] [stderr]      |
[INFO] [stderr] 1006 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:995:5
[INFO] [stderr]     |
[INFO] [stderr] 995 |     (__0)
[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]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1071:5
[INFO] [stderr]      |
[INFO] [stderr] 1071 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1006:5
[INFO] [stderr]      |
[INFO] [stderr] 1006 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1108:5
[INFO] [stderr]      |
[INFO] [stderr] 1108 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1071:5
[INFO] [stderr]      |
[INFO] [stderr] 1071 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1132:5
[INFO] [stderr]      |
[INFO] [stderr] 1132 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1108:5
[INFO] [stderr]      |
[INFO] [stderr] 1108 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1143:5
[INFO] [stderr]      |
[INFO] [stderr] 1143 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1132:5
[INFO] [stderr]      |
[INFO] [stderr] 1132 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1156:5
[INFO] [stderr]      |
[INFO] [stderr] 1156 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1143:5
[INFO] [stderr]      |
[INFO] [stderr] 1143 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-fe24d24593ffe9ae/out/grammar.rs:1156:5
[INFO] [stderr]      |
[INFO] [stderr] 1156 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 20s
[INFO] running `"docker" "inspect" "56be843237157b0e90e1c73b83a03c4788abfdf90794c80cf6473513c4b08edd"`
[INFO] running `"docker" "rm" "-f" "56be843237157b0e90e1c73b83a03c4788abfdf90794c80cf6473513c4b08edd"`
[INFO] [stdout] 56be843237157b0e90e1c73b83a03c4788abfdf90794c80cf6473513c4b08edd