[INFO] fetching crate lamcal 0.4.0...
[INFO] checking lamcal-0.4.0 against beta for pr-78714
[INFO] extracting crate lamcal 0.4.0 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate lamcal 0.4.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lamcal 0.4.0
[INFO] finished tweaking crates.io crate lamcal 0.4.0
[INFO] tweaked toml for crates.io crate lamcal 0.4.0 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1719b5264736cdf45ae1f01de33eb14b3d3acd6895fa64b2b53ac26deb705a95
[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" "1719b5264736cdf45ae1f01de33eb14b3d3acd6895fa64b2b53ac26deb705a95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1719b5264736cdf45ae1f01de33eb14b3d3acd6895fa64b2b53ac26deb705a95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1719b5264736cdf45ae1f01de33eb14b3d3acd6895fa64b2b53ac26deb705a95", kill_on_drop: false }`
[INFO] [stdout] 1719b5264736cdf45ae1f01de33eb14b3d3acd6895fa64b2b53ac26deb705a95
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "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] 6e783c610af05d80931591cba8f4427f781c072f8562d337159dc630e1b3b06a
[INFO] running `Command { std: "docker" "start" "-a" "6e783c610af05d80931591cba8f4427f781c072f8562d337159dc630e1b3b06a", kill_on_drop: false }`
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]     Checking lamcal v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand_xoshiro v0.1.0
[INFO] [stderr]     Checking syn v0.11.11
[INFO] [stderr]     Checking criterion-plot v0.3.1
[INFO] [stderr]     Checking proptest v0.8.7
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/reduction/mod.rs:734:25
[INFO] [stdout]     |
[INFO] [stdout] 734 |             if let Some(mut expand_with) = maybe_expand_with {
[INFO] [stdout]     |                         ----^^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr]     Checking version-sync v0.5.0
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/reduction/mod.rs:734:25
[INFO] [stdout]     |
[INFO] [stdout] 734 |             if let Some(mut expand_with) = maybe_expand_with {
[INFO] [stdout]     |                         ----^^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.26s
[INFO] running `Command { std: "docker" "inspect" "6e783c610af05d80931591cba8f4427f781c072f8562d337159dc630e1b3b06a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e783c610af05d80931591cba8f4427f781c072f8562d337159dc630e1b3b06a", kill_on_drop: false }`
[INFO] [stdout] 6e783c610af05d80931591cba8f4427f781c072f8562d337159dc630e1b3b06a