[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#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzielmicha%2Froboot3" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zielmicha/roboot3 on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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-0/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "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-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f7866e5bd8e3d8ddaf51892157ba9f342c860f5cc5298ee702ed86160e9cfb94
[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" "f7866e5bd8e3d8ddaf51892157ba9f342c860f5cc5298ee702ed86160e9cfb94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7866e5bd8e3d8ddaf51892157ba9f342c860f5cc5298ee702ed86160e9cfb94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7866e5bd8e3d8ddaf51892157ba9f342c860f5cc5298ee702ed86160e9cfb94", kill_on_drop: false }`
[INFO] [stdout] f7866e5bd8e3d8ddaf51892157ba9f342c860f5cc5298ee702ed86160e9cfb94
[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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e6664326709cd867fbfcade22cd56dfd3d98f2c63fa92cfa98d390f7c4aad65
[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" "6e6664326709cd867fbfcade22cd56dfd3d98f2c63fa92cfa98d390f7c4aad65", 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: 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: 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: 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 1.71s
[INFO] running `Command { std: "docker" "inspect" "6e6664326709cd867fbfcade22cd56dfd3d98f2c63fa92cfa98d390f7c4aad65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e6664326709cd867fbfcade22cd56dfd3d98f2c63fa92cfa98d390f7c4aad65", kill_on_drop: false }`
[INFO] [stdout] 6e6664326709cd867fbfcade22cd56dfd3d98f2c63fa92cfa98d390f7c4aad65