[INFO] fetching crate r9ir 1.0.0...
[INFO] checking r9ir-1.0.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate r9ir 1.0.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate r9ir 1.0.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] a09f67c284d6752fa2ee64f4efa87cacfe42a83e57e4c94f1ffcffe8f5293f4e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "a09f67c284d6752fa2ee64f4efa87cacfe42a83e57e4c94f1ffcffe8f5293f4e"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking r9ir v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/token.rs:288:32
[INFO] [stderr]     |
[INFO] [stderr] 288 | fn open_file(f: String) -> Box<Read> {
[INFO] [stderr]     |                                ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/token.rs:288:32
[INFO] [stderr]     |
[INFO] [stderr] 288 | fn open_file(f: String) -> Box<Read> {
[INFO] [stderr]     |                                ^^^^ help: use `dyn`: `dyn Read`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/parse.rs:1272:17
[INFO] [stderr]      |
[INFO] [stderr] 1272 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::FOR, Some(Box::new(t.clone())))));
[INFO] [stderr]      |                 ----^^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/parse.rs:1301:17
[INFO] [stderr]      |
[INFO] [stderr] 1301 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::FOR, Some(Box::new(t.clone())))));
[INFO] [stderr]      |                 ----^^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/parse.rs:1315:17
[INFO] [stderr]      |
[INFO] [stderr] 1315 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::DO_WHILE, Some(Box::new(t.clone())))));
[INFO] [stderr]      |                 ----^^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/parse.rs:1331:17
[INFO] [stderr]      |
[INFO] [stderr] 1331 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::SWITCH, Some(Box::new(t.clone())))));
[INFO] [stderr]      |                 ----^^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/parse.rs:1272:17
[INFO] [stderr]      |
[INFO] [stderr] 1272 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::FOR, Some(Box::new(t.clone())))));
[INFO] [stderr]      |                 ----^^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/parse.rs:1301:17
[INFO] [stderr]      |
[INFO] [stderr] 1301 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::FOR, Some(Box::new(t.clone())))));
[INFO] [stderr]      |                 ----^^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/parse.rs:1315:17
[INFO] [stderr]      |
[INFO] [stderr] 1315 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::DO_WHILE, Some(Box::new(t.clone())))));
[INFO] [stderr]      |                 ----^^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/parse.rs:1331:17
[INFO] [stderr]      |
[INFO] [stderr] 1331 |             let mut node = Rc::new(RefCell::new(new_node(NodeType::SWITCH, Some(Box::new(t.clone())))));
[INFO] [stderr]      |                 ----^^^^
[INFO] [stderr]      |                 |
[INFO] [stderr]      |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/sema.rs:422:13
[INFO] [stderr]     |
[INFO] [stderr] 422 |         let mut body = node.borrow_mut().body.clone().unwrap();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/sema.rs:422:13
[INFO] [stderr]     |
[INFO] [stderr] 422 |         let mut body = node.borrow_mut().body.clone().unwrap();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/liveness.rs:101:13
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut ent = bbs[0].clone();
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/liveness.rs:101:13
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut ent = bbs[0].clone();
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.81s
[INFO] running `"docker" "inspect" "a09f67c284d6752fa2ee64f4efa87cacfe42a83e57e4c94f1ffcffe8f5293f4e"`
[INFO] running `"docker" "rm" "-f" "a09f67c284d6752fa2ee64f4efa87cacfe42a83e57e4c94f1ffcffe8f5293f4e"`
[INFO] [stdout] a09f67c284d6752fa2ee64f4efa87cacfe42a83e57e4c94f1ffcffe8f5293f4e