[INFO] cloning repository https://github.com/zielmicha/roboot3
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zielmicha/roboot3" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzielmicha%2Froboot3", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzielmicha%2Froboot3'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 54cc5f436d199bf3ad414b564e603424ea55187f
[INFO] checking zielmicha/roboot3 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzielmicha%2Froboot3" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zielmicha/roboot3 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zielmicha/roboot3
[INFO] finished tweaking git repo https://github.com/zielmicha/roboot3
[INFO] tweaked toml for git repo https://github.com/zielmicha/roboot3 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/zielmicha/roboot3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dynamic-arena v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6816134e215b96116d2718bd87a1ddf351167cdf366f1175590737b5e2065fbc
[INFO] running `Command { std: "docker" "start" "-a" "6816134e215b96116d2718bd87a1ddf351167cdf366f1175590737b5e2065fbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6816134e215b96116d2718bd87a1ddf351167cdf366f1175590737b5e2065fbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6816134e215b96116d2718bd87a1ddf351167cdf366f1175590737b5e2065fbc", kill_on_drop: false }`
[INFO] [stdout] 6816134e215b96116d2718bd87a1ddf351167cdf366f1175590737b5e2065fbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] db77ca6b84c2049968f478ad3e65b462fd22269b5e7c70788aba726f394cd287
[INFO] running `Command { std: "docker" "start" "-a" "db77ca6b84c2049968f478ad3e65b462fd22269b5e7c70788aba726f394cd287", kill_on_drop: false }`
[INFO] [stderr]     Checking typed-arena v1.7.0
[INFO] [stderr]     Checking typed-arena v2.0.1
[INFO] [stderr]     Checking dynamic-arena v0.1.2
[INFO] [stderr]     Checking roboot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/backref.rs:126:16
[INFO] [stdout]     |
[INFO] [stdout] 126 |     on_remove: (&'static dyn Fn(R<T>, V) -> ()),
[INFO] [stdout]     |                ^                              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 126 -     on_remove: (&'static dyn Fn(R<T>, V) -> ()),
[INFO] [stdout] 126 +     on_remove: &'static dyn Fn(R<T>, V) -> (),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/backref.rs:199:39
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn new(this: R<T>, on_remove: (&'static dyn Fn(R<T>, V) -> ())) -> Self {
[INFO] [stdout]     |                                       ^                              ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 199 -     pub fn new(this: R<T>, on_remove: (&'static dyn Fn(R<T>, V) -> ())) -> Self {
[INFO] [stdout] 199 +     pub fn new(this: R<T>, on_remove: &'static dyn Fn(R<T>, V) -> ()) -> Self {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/backref.rs:242:18
[INFO] [stdout]     |
[INFO] [stdout] 242 |     let fun_ptr: (fn(R<K>, &ArgType) -> ()) = std::mem::transmute(fun_ptr);
[INFO] [stdout]     |                  ^                        ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 242 -     let fun_ptr: (fn(R<K>, &ArgType) -> ()) = std::mem::transmute(fun_ptr);
[INFO] [stdout] 242 +     let fun_ptr: fn(R<K>, &ArgType) -> () = std::mem::transmute(fun_ptr);
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/backref.rs:126:16
[INFO] [stdout]     |
[INFO] [stdout] 126 |     on_remove: (&'static dyn Fn(R<T>, V) -> ()),
[INFO] [stdout]     |                ^                              ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 126 -     on_remove: (&'static dyn Fn(R<T>, V) -> ()),
[INFO] [stdout] 126 +     on_remove: &'static dyn Fn(R<T>, V) -> (),
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/backref.rs:199:39
[INFO] [stdout]     |
[INFO] [stdout] 199 |     pub fn new(this: R<T>, on_remove: (&'static dyn Fn(R<T>, V) -> ())) -> Self {
[INFO] [stdout]     |                                       ^                              ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 199 -     pub fn new(this: R<T>, on_remove: (&'static dyn Fn(R<T>, V) -> ())) -> Self {
[INFO] [stdout] 199 +     pub fn new(this: R<T>, on_remove: &'static dyn Fn(R<T>, V) -> ()) -> Self {
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/backref.rs:242:18
[INFO] [stdout]     |
[INFO] [stdout] 242 |     let fun_ptr: (fn(R<K>, &ArgType) -> ()) = std::mem::transmute(fun_ptr);
[INFO] [stdout]     |                  ^                        ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 242 -     let fun_ptr: (fn(R<K>, &ArgType) -> ()) = std::mem::transmute(fun_ptr);
[INFO] [stdout] 242 +     let fun_ptr: fn(R<K>, &ArgType) -> () = std::mem::transmute(fun_ptr);
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `borrow_mut`
[INFO] [stdout]   --> src/backref.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 |     unsafe fn borrow_mut<T>(&mut self) -> &mut T {
[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: `add`
[INFO] [stdout]    --> src/backref.rs:195:12
[INFO] [stdout]     |
[INFO] [stdout] 195 |     pub fn add(&self, a: Rc<RInner>, value: V) {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_this`
[INFO] [stdout]    --> src/backref.rs:208:12
[INFO] [stdout]     |
[INFO] [stdout] 208 |     pub fn get_this(&self) -> R<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `borrow_mut`
[INFO] [stdout]   --> src/backref.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 |     unsafe fn borrow_mut<T>(&mut self) -> &mut T {
[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: `add`
[INFO] [stdout]    --> src/backref.rs:195:12
[INFO] [stdout]     |
[INFO] [stdout] 195 |     pub fn add(&self, a: Rc<RInner>, value: V) {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get_this`
[INFO] [stdout]    --> src/backref.rs:208:12
[INFO] [stdout]     |
[INFO] [stdout] 208 |     pub fn get_this(&self) -> R<T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `on_remove`
[INFO] [stdout]  --> src/backref_test.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |     fn on_remove(this: R<i64>, value: i64) {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "db77ca6b84c2049968f478ad3e65b462fd22269b5e7c70788aba726f394cd287", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db77ca6b84c2049968f478ad3e65b462fd22269b5e7c70788aba726f394cd287", kill_on_drop: false }`
[INFO] [stdout] db77ca6b84c2049968f478ad3e65b462fd22269b5e7c70788aba726f394cd287