[INFO] crate lru2 0.1.0 is already in cache
[INFO] checking lru2-0.1.0 against try#85cc1486e1f000dce4bb8e1b3cfab2b654b102a8 for pr-73323
[INFO] extracting crate lru2 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate lru2 0.1.0 on toolchain 85cc1486e1f000dce4bb8e1b3cfab2b654b102a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lru2 0.1.0
[INFO] finished tweaking crates.io crate lru2 0.1.0
[INFO] tweaked toml for crates.io crate lru2 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d4f9200daa04ecf6beaca9ccec75630a3077da94c9f8a9a0331d269d6ad829f9
[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" "d4f9200daa04ecf6beaca9ccec75630a3077da94c9f8a9a0331d269d6ad829f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4f9200daa04ecf6beaca9ccec75630a3077da94c9f8a9a0331d269d6ad829f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4f9200daa04ecf6beaca9ccec75630a3077da94c9f8a9a0331d269d6ad829f9", kill_on_drop: false }`
[INFO] [stdout] d4f9200daa04ecf6beaca9ccec75630a3077da94c9f8a9a0331d269d6ad829f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c82769a300f4573e36403f2120abc493738379c685a1630420bba3d044cdb3e2
[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" "c82769a300f4573e36403f2120abc493738379c685a1630420bba3d044cdb3e2", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking lru2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cache/mod.rs:50:21
[INFO] [stdout]    |
[INFO] [stdout] 50 |                 let mut cache: &mut Register<C::LowerKey, C::Payload> = unsafe{ &mut **pcache };
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/cache/mod.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let mut cache: &mut Register<C::LowerKey, C::Payload> = unsafe{ &mut **self.register.get(upper_key).unwrap() };
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cache/mod.rs:50:21
[INFO] [stdout]    |
[INFO] [stdout] 50 |                 let mut cache: &mut Register<C::LowerKey, C::Payload> = unsafe{ &mut **pcache };
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/cache/mod.rs:57:13
[INFO] [stdout]    |
[INFO] [stdout] 57 |         let mut cache: &mut Register<C::LowerKey, C::Payload> = unsafe{ &mut **self.register.get(upper_key).unwrap() };
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.91s
[INFO] running `Command { std: "docker" "inspect" "c82769a300f4573e36403f2120abc493738379c685a1630420bba3d044cdb3e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c82769a300f4573e36403f2120abc493738379c685a1630420bba3d044cdb3e2", kill_on_drop: false }`
[INFO] [stdout] c82769a300f4573e36403f2120abc493738379c685a1630420bba3d044cdb3e2