[INFO] fetching crate r9ir 1.0.0...
[INFO] checking r9ir-1.0.0 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate r9ir 1.0.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate r9ir 1.0.0 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate r9ir 1.0.0
[INFO] finished tweaking crates.io crate r9ir 1.0.0
[INFO] tweaked toml for crates.io crate r9ir 1.0.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 774c1f8eb1abf2e8c8a294abadc172e8646a3da82550f818de30f1e2fa9c899a
[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" "774c1f8eb1abf2e8c8a294abadc172e8646a3da82550f818de30f1e2fa9c899a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "774c1f8eb1abf2e8c8a294abadc172e8646a3da82550f818de30f1e2fa9c899a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "774c1f8eb1abf2e8c8a294abadc172e8646a3da82550f818de30f1e2fa9c899a", kill_on_drop: false }`
[INFO] [stdout] 774c1f8eb1abf2e8c8a294abadc172e8646a3da82550f818de30f1e2fa9c899a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f9fe54227269530f3b2c0130f47f172edc4188f4d0846c9aae705881feac965
[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" "8f9fe54227269530f3b2c0130f47f172edc4188f4d0846c9aae705881feac965", kill_on_drop: false }`
[INFO] [stderr]     Checking r9ir v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/token.rs:288:32
[INFO] [stdout]     |
[INFO] [stdout] 288 | fn open_file(f: String) -> Box<Read> {
[INFO] [stdout]     |                                ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/token.rs:288:32
[INFO] [stdout]     |
[INFO] [stdout] 288 | fn open_file(f: String) -> Box<Read> {
[INFO] [stdout]     |                                ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/parse.rs:1272:17
[INFO] [stdout]      |
[INFO] [stdout] 1272 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::FOR, Some(Box::new(t.clone())))));
[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/parse.rs:1301:17
[INFO] [stdout]      |
[INFO] [stdout] 1301 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::FOR, Some(Box::new(t.clone())))));
[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/parse.rs:1315:17
[INFO] [stdout]      |
[INFO] [stdout] 1315 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::DO_WHILE, Some(Box::new(t.clone())))));
[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/parse.rs:1331:17
[INFO] [stdout]      |
[INFO] [stdout] 1331 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::SWITCH, Some(Box::new(t.clone())))));
[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/parse.rs:1272:17
[INFO] [stdout]      |
[INFO] [stdout] 1272 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::FOR, Some(Box::new(t.clone())))));
[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/parse.rs:1301:17
[INFO] [stdout]      |
[INFO] [stdout] 1301 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::FOR, Some(Box::new(t.clone())))));
[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/parse.rs:1315:17
[INFO] [stdout]      |
[INFO] [stdout] 1315 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::DO_WHILE, Some(Box::new(t.clone())))));
[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/parse.rs:1331:17
[INFO] [stdout]      |
[INFO] [stdout] 1331 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::SWITCH, Some(Box::new(t.clone())))));
[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/sema.rs:422:13
[INFO] [stdout]     |
[INFO] [stdout] 422 |         let mut body = node.borrow_mut().body.clone().unwrap();
[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/sema.rs:422:13
[INFO] [stdout]     |
[INFO] [stdout] 422 |         let mut body = node.borrow_mut().body.clone().unwrap();
[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/liveness.rs:101:13
[INFO] [stdout]     |
[INFO] [stdout] 101 |         let mut ent = bbs[0].clone();
[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/liveness.rs:101:13
[INFO] [stdout]     |
[INFO] [stdout] 101 |         let mut ent = bbs[0].clone();
[INFO] [stdout]     |             ----^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.98s
[INFO] running `Command { std: "docker" "inspect" "8f9fe54227269530f3b2c0130f47f172edc4188f4d0846c9aae705881feac965", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f9fe54227269530f3b2c0130f47f172edc4188f4d0846c9aae705881feac965", kill_on_drop: false }`
[INFO] [stdout] 8f9fe54227269530f3b2c0130f47f172edc4188f4d0846c9aae705881feac965