[INFO] updating cached repository https://github.com/andrewhickman/small-lang
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 61423387c252be44be4290a94dd260e9e8624075
[INFO] checking andrewhickman/small-lang against master#4fb54ed484e2239a3e9eff3be17df00d2a162be3 for pr-73345
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrewhickman%2Fsmall-lang" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/andrewhickman/small-lang on toolchain 4fb54ed484e2239a3e9eff3be17df00d2a162be3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/andrewhickman/small-lang
[INFO] finished tweaking git repo https://github.com/andrewhickman/small-lang
[INFO] tweaked toml for git repo https://github.com/andrewhickman/small-lang written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/andrewhickman/small-lang already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca58ec2c5688aab8cb352cbe29e36fbc9f666a969028a63d28fc9a8d831c514a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ca58ec2c5688aab8cb352cbe29e36fbc9f666a969028a63d28fc9a8d831c514a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca58ec2c5688aab8cb352cbe29e36fbc9f666a969028a63d28fc9a8d831c514a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca58ec2c5688aab8cb352cbe29e36fbc9f666a969028a63d28fc9a8d831c514a", kill_on_drop: false }`
[INFO] [stdout] ca58ec2c5688aab8cb352cbe29e36fbc9f666a969028a63d28fc9a8d831c514a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 425af53b41d68fe4e66205836a86a60fdb48a275b6e118105324222bcec1708b
[INFO] running `Command { std: "docker" "start" "-a" "425af53b41d68fe4e66205836a86a60fdb48a275b6e118105324222bcec1708b", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
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[INFO] [stderr]     Checking mlsub v0.0.0 (https://github.com/andrewhickman/mlsub-rs?tag=v0.1.6#75a9d88a)
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[INFO] [stderr]    Compiling small-lang v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:3878:5
[INFO] [stdout]      |
[INFO] [stdout] 3878 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:3890:5
[INFO] [stdout]      |
[INFO] [stdout] 3890 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:3962:5
[INFO] [stdout]      |
[INFO] [stdout] 3962 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4014:5
[INFO] [stdout]      |
[INFO] [stdout] 4014 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4335:5
[INFO] [stdout]      |
[INFO] [stdout] 4335 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4349:5
[INFO] [stdout]      |
[INFO] [stdout] 4349 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4528:5
[INFO] [stdout]      |
[INFO] [stdout] 4528 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4757:5
[INFO] [stdout]      |
[INFO] [stdout] 4757 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4820:5
[INFO] [stdout]      |
[INFO] [stdout] 4820 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:3878:5
[INFO] [stdout]      |
[INFO] [stdout] 3878 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:3890:5
[INFO] [stdout]      |
[INFO] [stdout] 3890 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:3962:5
[INFO] [stdout]      |
[INFO] [stdout] 3962 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4014:5
[INFO] [stdout]      |
[INFO] [stdout] 4014 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4335:5
[INFO] [stdout]      |
[INFO] [stdout] 4335 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4349:5
[INFO] [stdout]      |
[INFO] [stdout] 4349 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4528:5
[INFO] [stdout]      |
[INFO] [stdout] 4528 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4757:5
[INFO] [stdout]      |
[INFO] [stdout] 4757 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/small-lang-3e7da43917c42da0/out/syntax/parser.rs:4820:5
[INFO] [stdout]      |
[INFO] [stdout] 4820 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 35s
[INFO] running `Command { std: "docker" "inspect" "425af53b41d68fe4e66205836a86a60fdb48a275b6e118105324222bcec1708b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "425af53b41d68fe4e66205836a86a60fdb48a275b6e118105324222bcec1708b", kill_on_drop: false }`
[INFO] [stdout] 425af53b41d68fe4e66205836a86a60fdb48a275b6e118105324222bcec1708b