[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#82acd1d76add2232e19c1f0feb250d2a19ec6efe for pr-81213
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzielmicha%2Froboot3" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zielmicha/roboot3 on toolchain 82acd1d76add2232e19c1f0feb250d2a19ec6efe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "read-manifest" "--manifest-path" "Cargo.toml", 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-12/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" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded typed-arena v1.7.0
[INFO] [stderr]   Downloaded dynamic-arena v0.1.2
[INFO] running `Command { std: "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" "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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47825e5cd02f6878106b8f2d1666ca522441e7767803906cb0315820ca97bfd7
[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" "47825e5cd02f6878106b8f2d1666ca522441e7767803906cb0315820ca97bfd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47825e5cd02f6878106b8f2d1666ca522441e7767803906cb0315820ca97bfd7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47825e5cd02f6878106b8f2d1666ca522441e7767803906cb0315820ca97bfd7", kill_on_drop: false }`
[INFO] [stdout] 47825e5cd02f6878106b8f2d1666ca522441e7767803906cb0315820ca97bfd7
[INFO] running `Command { std: "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" "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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5ab163c00de09e0873921f4eb8c8a0e2088560608a79d418adb701e21c3786e
[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" "e5ab163c00de09e0873921f4eb8c8a0e2088560608a79d418adb701e21c3786e", 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]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[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]     |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[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]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[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]     |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[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]     |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[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]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[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: 6 warnings emitted
[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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.11s
[INFO] running `Command { std: "docker" "inspect" "e5ab163c00de09e0873921f4eb8c8a0e2088560608a79d418adb701e21c3786e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5ab163c00de09e0873921f4eb8c8a0e2088560608a79d418adb701e21c3786e", kill_on_drop: false }`
[INFO] [stdout] e5ab163c00de09e0873921f4eb8c8a0e2088560608a79d418adb701e21c3786e