[INFO] cloning repository https://github.com/JerTH/sim
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JerTH/sim" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJerTH%2Fsim", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJerTH%2Fsim'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 18b7c9781fcbb30c98589c3fd21cfe009023ee80
[INFO] checking JerTH/sim against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJerTH%2Fsim" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JerTH/sim on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JerTH/sim
[INFO] finished tweaking git repo https://github.com/JerTH/sim
[INFO] tweaked toml for git repo https://github.com/JerTH/sim written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/JerTH/sim already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 173c63d6753854a6ea6584dadd53a749fa5d242323c87adebf47bafb02427249
[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" "173c63d6753854a6ea6584dadd53a749fa5d242323c87adebf47bafb02427249", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "173c63d6753854a6ea6584dadd53a749fa5d242323c87adebf47bafb02427249", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "173c63d6753854a6ea6584dadd53a749fa5d242323c87adebf47bafb02427249", kill_on_drop: false }`
[INFO] [stdout] 173c63d6753854a6ea6584dadd53a749fa5d242323c87adebf47bafb02427249
[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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38c2b893f1dfeaafce97bf1e0ddc837a4f5f04d6ba3614efef24ac41b762d6c3
[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" "38c2b893f1dfeaafce97bf1e0ddc837a4f5f04d6ba3614efef24ac41b762d6c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking unsafe-any v0.4.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking ssim v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/collections.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |             let result = self.reserve( core::cmp::max(1usize,self.len()));
[INFO] [stdout]    |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wd`
[INFO] [stdout]   --> src/flowgraph.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let wd = node.write_deps();
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_wd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rd`
[INFO] [stdout]   --> src/flowgraph.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let rd = node.read_deps();
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_rd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/flowgraph.rs:79:26
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn remove(&mut self, key: FlowGraphKey) -> Result<N, ()> {
[INFO] [stdout]    |                          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read_only`
[INFO] [stdout]    --> src/world.rs:109:29
[INFO] [stdout]     |
[INFO] [stdout] 109 | ...   let read_only: Vec<&WorldSystem> = self.systems.as_slice().iter().filter(|system| system.writes.borrow().is_empty()).collect();
[INFO] [stdout]     |           ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_read_only`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writes`
[INFO] [stdout]    --> src/world.rs:110:29
[INFO] [stdout]     |
[INFO] [stdout] 110 | ...   let writes: Vec<&WorldSystem> = self.systems.as_slice().iter().filter(|system| !system.writes.borrow().is_empty()).collect();
[INFO] [stdout]     |           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/collections.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |             let result = self.reserve( core::cmp::max(1usize,self.len()));
[INFO] [stdout]    |                 ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `wd`
[INFO] [stdout]   --> src/flowgraph.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let wd = node.write_deps();
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_wd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rd`
[INFO] [stdout]   --> src/flowgraph.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |         let rd = node.read_deps();
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_rd`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/flowgraph.rs:79:26
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn remove(&mut self, key: FlowGraphKey) -> Result<N, ()> {
[INFO] [stdout]    |                          ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `read_only`
[INFO] [stdout]    --> src/world.rs:109:29
[INFO] [stdout]     |
[INFO] [stdout] 109 | ...   let read_only: Vec<&WorldSystem> = self.systems.as_slice().iter().filter(|system| system.writes.borrow().is_empty()).collect();
[INFO] [stdout]     |           ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_read_only`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `writes`
[INFO] [stdout]    --> src/world.rs:110:29
[INFO] [stdout]     |
[INFO] [stdout] 110 | ...   let writes: Vec<&WorldSystem> = self.systems.as_slice().iter().filter(|system| !system.writes.borrow().is_empty()).collect();
[INFO] [stdout]     |           ^^^^^^ help: if this is intentional, prefix it with an underscore: `_writes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `InsertionError`
[INFO] [stdout]  --> src/flowgraph.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum InsertionError<N> where N: FlowGraphNode {
[INFO] [stdout]   |      ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/flowgraph.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn new(node: N) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/flowgraph.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/flowgraph.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn insert(&mut self, node: N) -> Result<FlowGraphKey, InsertionError<N>> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/flowgraph.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn remove(&mut self, key: FlowGraphKey) -> Result<N, ()> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rebuild`
[INFO] [stdout]   --> src/flowgraph.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn rebuild(&mut self) -> Result<(), ()> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `InsertionError`
[INFO] [stdout]  --> src/flowgraph.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum InsertionError<N> where N: FlowGraphNode {
[INFO] [stdout]   |      ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/flowgraph.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn new(node: N) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/flowgraph.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `insert`
[INFO] [stdout]   --> src/flowgraph.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn insert(&mut self, node: N) -> Result<FlowGraphKey, InsertionError<N>> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `remove`
[INFO] [stdout]   --> src/flowgraph.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn remove(&mut self, key: FlowGraphKey) -> Result<N, ()> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `rebuild`
[INFO] [stdout]   --> src/flowgraph.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn rebuild(&mut self) -> Result<(), ()> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.76s
[INFO] running `Command { std: "docker" "inspect" "38c2b893f1dfeaafce97bf1e0ddc837a4f5f04d6ba3614efef24ac41b762d6c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38c2b893f1dfeaafce97bf1e0ddc837a4f5f04d6ba3614efef24ac41b762d6c3", kill_on_drop: false }`
[INFO] [stdout] 38c2b893f1dfeaafce97bf1e0ddc837a4f5f04d6ba3614efef24ac41b762d6c3