[INFO] fetching crate fctool 0.4.9...
[INFO] checking fctool-0.4.9 against master#6d69caba110c0c2fb90180df1cbc8be5033b91d4 for pr-69530
[INFO] extracting crate fctool 0.4.9 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate fctool 0.4.9 on toolchain 6d69caba110c0c2fb90180df1cbc8be5033b91d4
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6d69caba110c0c2fb90180df1cbc8be5033b91d4" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate fctool 0.4.9
[INFO] finished tweaking crates.io crate fctool 0.4.9
[INFO] tweaked toml for crates.io crate fctool 0.4.9 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate fctool 0.4.9 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6d69caba110c0c2fb90180df1cbc8be5033b91d4" "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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+6d69caba110c0c2fb90180df1cbc8be5033b91d4" "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] 9a9d30b0bb0e9ba0c0a7cb4dfe251c511348ad967f29618e9919c6fc6b0c59d7
[INFO] running `"docker" "start" "-a" "9a9d30b0bb0e9ba0c0a7cb4dfe251c511348ad967f29618e9919c6fc6b0c59d7"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]    Compiling regex-syntax v0.6.13
[INFO] [stderr]    Compiling lalrpop-util v0.17.2
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling ena v0.13.1
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling sha2 v0.8.1
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]     Checking regex v1.3.3
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling structopt-derive v0.4.6
[INFO] [stderr]     Checking structopt v0.3.13
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.17.2
[INFO] [stderr]    Compiling fctool v0.4.9 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `crate::helpers::*`
[INFO] [stderr]  --> /opt/rustwide/target/debug/build/fctool-8653ae8412ae20a3/out/grammar.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::helpers::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/fctool-8653ae8412ae20a3/out/grammar.rs:4607:5
[INFO] [stderr]      |
[INFO] [stderr] 4607 |     (__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/fctool-8653ae8412ae20a3/out/grammar.rs:4618:5
[INFO] [stderr]      |
[INFO] [stderr] 4618 |     (__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/fctool-8653ae8412ae20a3/out/grammar.rs:4629:5
[INFO] [stderr]      |
[INFO] [stderr] 4629 |     (__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/fctool-8653ae8412ae20a3/out/grammar.rs:4640:5
[INFO] [stderr]      |
[INFO] [stderr] 4640 |     (__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/fctool-8653ae8412ae20a3/out/grammar.rs:4651:5
[INFO] [stderr]      |
[INFO] [stderr] 4651 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::helpers::*`
[INFO] [stderr]  --> /opt/rustwide/target/debug/build/fctool-8653ae8412ae20a3/out/grammar.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::helpers::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/fctool-8653ae8412ae20a3/out/grammar.rs:4607:5
[INFO] [stderr]      |
[INFO] [stderr] 4607 |     (__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/fctool-8653ae8412ae20a3/out/grammar.rs:4618:5
[INFO] [stderr]      |
[INFO] [stderr] 4618 |     (__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/fctool-8653ae8412ae20a3/out/grammar.rs:4629:5
[INFO] [stderr]      |
[INFO] [stderr] 4629 |     (__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/fctool-8653ae8412ae20a3/out/grammar.rs:4640:5
[INFO] [stderr]      |
[INFO] [stderr] 4640 |     (__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/fctool-8653ae8412ae20a3/out/grammar.rs:4651:5
[INFO] [stderr]      |
[INFO] [stderr] 4651 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 42s
[INFO] running `"docker" "inspect" "9a9d30b0bb0e9ba0c0a7cb4dfe251c511348ad967f29618e9919c6fc6b0c59d7"`
[INFO] running `"docker" "rm" "-f" "9a9d30b0bb0e9ba0c0a7cb4dfe251c511348ad967f29618e9919c6fc6b0c59d7"`
[INFO] [stdout] 9a9d30b0bb0e9ba0c0a7cb4dfe251c511348ad967f29618e9919c6fc6b0c59d7