[INFO] cloning repository https://github.com/abh1nav10/interior_mutability
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/abh1nav10/interior_mutability" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabh1nav10%2Finterior_mutability", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabh1nav10%2Finterior_mutability'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7fb448b146600e7bcdcbdbf86c65356e141a7796
[INFO] checking abh1nav10/interior_mutability against try#a611f2a14e38407ec6717a86a01424ee6fc80762 for pr-154992
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabh1nav10%2Finterior_mutability" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/abh1nav10/interior_mutability
[INFO] finished tweaking git repo https://github.com/abh1nav10/interior_mutability
[INFO] tweaked toml for git repo https://github.com/abh1nav10/interior_mutability written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/abh1nav10/interior_mutability on toolchain a611f2a14e38407ec6717a86a01424ee6fc80762
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/abh1nav10/interior_mutability already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking abh1nav10/interior_mutability against try#a611f2a14e38407ec6717a86a01424ee6fc80762 for pr-154992
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fabh1nav10%2Finterior_mutability" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/abh1nav10/interior_mutability
[INFO] finished tweaking git repo https://github.com/abh1nav10/interior_mutability
[INFO] tweaked toml for git repo https://github.com/abh1nav10/interior_mutability written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/abh1nav10/interior_mutability on toolchain a611f2a14e38407ec6717a86a01424ee6fc80762
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/abh1nav10/interior_mutability already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f1afdca59a99e3ba911ed91c6281fb2accc1354d9ee698c9b885fafcd38706d9
[INFO] running `Command { std: "docker" "start" "-a" "f1afdca59a99e3ba911ed91c6281fb2accc1354d9ee698c9b885fafcd38706d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1afdca59a99e3ba911ed91c6281fb2accc1354d9ee698c9b885fafcd38706d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1afdca59a99e3ba911ed91c6281fb2accc1354d9ee698c9b885fafcd38706d9", kill_on_drop: false }`
[INFO] [stdout] f1afdca59a99e3ba911ed91c6281fb2accc1354d9ee698c9b885fafcd38706d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+a611f2a14e38407ec6717a86a01424ee6fc80762" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f5af4d10cb80e5b5c28366643fe464d180e4427b518bbd801498d131fa2435d
[INFO] running `Command { std: "docker" "start" "-a" "9f5af4d10cb80e5b5c28366643fe464d180e4427b518bbd801498d131fa2435d", kill_on_drop: false }`
[INFO] [stderr]     Checking rusty v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `RcInner` is never constructed
[INFO] [stdout]  --> src/rc.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct RcInner<T> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RcInner` is never constructed
[INFO] [stdout]  --> src/rc.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct RcInner<T> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rc` is never constructed
[INFO] [stdout]   --> src/rc.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Rc<T> {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rc` is never constructed
[INFO] [stdout]   --> src/rc.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub struct Rc<T> {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_ref`, and `get_mut` are never used
[INFO] [stdout]   --> src/rc.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<T> Rc<T> {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 19 |     pub fn new(item: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn get_ref(&self) -> Option<Ref<T>> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn get_mut(&self) -> Option<RefMut<T>> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get_ref`, and `get_mut` are never used
[INFO] [stdout]   --> src/rc.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 18 | impl<T> Rc<T> {
[INFO] [stdout]    | ------------- associated items in this implementation
[INFO] [stdout] 19 |     pub fn new(item: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     pub fn get_ref(&self) -> Option<Ref<T>> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn get_mut(&self) -> Option<RefMut<T>> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RefCell` is never constructed
[INFO] [stdout]  --> src/refcell.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct RefCell<T> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RefCell` is never constructed
[INFO] [stdout]  --> src/refcell.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct RefCell<T> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RefState` is never used
[INFO] [stdout]   --> src/refcell.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum RefState {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `RefState` is never used
[INFO] [stdout]   --> src/refcell.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum RefState {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ref` is never constructed
[INFO] [stdout]   --> src/refcell.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Ref<'refcell, T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Ref` is never constructed
[INFO] [stdout]   --> src/refcell.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct Ref<'refcell, T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RefMut` is never constructed
[INFO] [stdout]   --> src/refcell.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct RefMut<'refcell, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RefMut` is never constructed
[INFO] [stdout]   --> src/refcell.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub struct RefMut<'refcell, T> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `borrow`, and `borrow_mut` are never used
[INFO] [stdout]   --> src/refcell.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T> RefCell<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 28 |     pub fn new(item: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn borrow(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn borrow_mut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `borrow`, and `borrow_mut` are never used
[INFO] [stdout]   --> src/refcell.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl<T> RefCell<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 28 |     pub fn new(item: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn borrow(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 49 |     pub fn borrow_mut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/rc.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn get_ref(&self) -> Option<Ref<T>> {
[INFO] [stdout]    |                    ^^^^^            ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn get_ref(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/rc.rs:31:20
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn get_ref(&self) -> Option<Ref<T>> {
[INFO] [stdout]    |                    ^^^^^            ^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 31 |     pub fn get_ref(&self) -> Option<Ref<'_, T>> {
[INFO] [stdout]    |                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/rc.rs:35:20
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn get_mut(&self) -> Option<RefMut<T>> {
[INFO] [stdout]    |                    ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn get_mut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/rc.rs:35:20
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn get_mut(&self) -> Option<RefMut<T>> {
[INFO] [stdout]    |                    ^^^^^            ^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn get_mut(&self) -> Option<RefMut<'_, T>> {
[INFO] [stdout]    |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "9f5af4d10cb80e5b5c28366643fe464d180e4427b518bbd801498d131fa2435d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f5af4d10cb80e5b5c28366643fe464d180e4427b518bbd801498d131fa2435d", kill_on_drop: false }`
[INFO] [stdout] 9f5af4d10cb80e5b5c28366643fe464d180e4427b518bbd801498d131fa2435d
