[INFO] fetching crate msg-store 0.9.1...
[INFO] checking msg-store-0.9.1 against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] extracting crate msg-store 0.9.1 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate msg-store 0.9.1 on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate msg-store 0.9.1
[INFO] finished tweaking crates.io crate msg-store 0.9.1
[INFO] tweaked toml for crates.io crate msg-store 0.9.1 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded msg_store_uuid v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5ecb8db84ac5bb23f2ce8886adb0f275c6bbbab1611316d151cb70ef687dace
[INFO] running `Command { std: "docker" "start" "-a" "f5ecb8db84ac5bb23f2ce8886adb0f275c6bbbab1611316d151cb70ef687dace", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5ecb8db84ac5bb23f2ce8886adb0f275c6bbbab1611316d151cb70ef687dace", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5ecb8db84ac5bb23f2ce8886adb0f275c6bbbab1611316d151cb70ef687dace", kill_on_drop: false }`
[INFO] [stdout] f5ecb8db84ac5bb23f2ce8886adb0f275c6bbbab1611316d151cb70ef687dace
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ecd45c9a26f3f0ce1e8f3fc2633ec1af02e7d0a75bcb17116b842dacc6e2f1da
[INFO] running `Command { std: "docker" "start" "-a" "ecd45c9a26f3f0ce1e8f3fc2633ec1af02e7d0a75bcb17116b842dacc6e2f1da", kill_on_drop: false }`
[INFO] [stderr]     Checking msg_store_uuid v0.1.0
[INFO] [stderr]     Checking msg-store v0.9.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:502:13
[INFO] [stdout]     |
[INFO] [stdout] 502 |         let mut group = match self.groups_map.get_mut(&priority) {
[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] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:502:13
[INFO] [stdout]     |
[INFO] [stdout] 502 |         let mut group = match self.groups_map.get_mut(&priority) {
[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/lib.rs:907:17
[INFO] [stdout]     |
[INFO] [stdout] 907 |             let mut group = store.groups_map.get_mut(&1).expect("Could not find group");
[INFO] [stdout]     |                 ----^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:917:17
[INFO] [stdout]     |
[INFO] [stdout] 917 |             let mut group = store.groups_map.get_mut(&1).expect("Could not get mutable group");
[INFO] [stdout]     |                 ----^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:928:17
[INFO] [stdout]     |
[INFO] [stdout] 928 |             let mut group = store.groups_map.get_mut(&1).expect("Could not get mutable group");
[INFO] [stdout]     |                 ----^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:990:17
[INFO] [stdout]     |
[INFO] [stdout] 990 |             let mut group = store.groups_map.get_mut(&1).expect("Could not get mutable group");
[INFO] [stdout]     |                 ----^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:1022:17
[INFO] [stdout]      |
[INFO] [stdout] 1022 |             let mut group = store.groups_map.get_mut(&2).expect("Group not found");
[INFO] [stdout]      |                 ----^^^^^
[INFO] [stdout]      |                 |
[INFO] [stdout]      |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "ecd45c9a26f3f0ce1e8f3fc2633ec1af02e7d0a75bcb17116b842dacc6e2f1da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ecd45c9a26f3f0ce1e8f3fc2633ec1af02e7d0a75bcb17116b842dacc6e2f1da", kill_on_drop: false }`
[INFO] [stdout] ecd45c9a26f3f0ce1e8f3fc2633ec1af02e7d0a75bcb17116b842dacc6e2f1da