[INFO] cloning repository https://github.com/sibkit/erc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sibkit/erc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsibkit%2Ferc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsibkit%2Ferc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b8cd78c8984c2c53fd904db88d9e13ef1d3f7aeb
[INFO] checking sibkit/erc against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsibkit%2Ferc" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sibkit/erc on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sibkit/erc
[INFO] finished tweaking git repo https://github.com/sibkit/erc
[INFO] tweaked toml for git repo https://github.com/sibkit/erc written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sibkit/erc 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "2a48489afdbbf31fafe898a19836404f4e84083c395f513347c577316c5e2523", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a48489afdbbf31fafe898a19836404f4e84083c395f513347c577316c5e2523", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a48489afdbbf31fafe898a19836404f4e84083c395f513347c577316c5e2523", kill_on_drop: false }`
[INFO] [stdout] 2a48489afdbbf31fafe898a19836404f4e84083c395f513347c577316c5e2523
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e14fa18b694352bbb2c9073f0b5d712a9d0547a647b1a7c132671e34f9123d2
[INFO] running `Command { std: "docker" "start" "-a" "0e14fa18b694352bbb2c9073f0b5d712a9d0547a647b1a7c132671e34f9123d2", kill_on_drop: false }`
[INFO] [stderr]     Checking erc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::alloc::Allocator`
[INFO] [stdout]  --> src/erc.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::alloc::Allocator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cell` and `UnsafeCell`
[INFO] [stdout]  --> src/erc.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cell::{Cell, UnsafeCell};
[INFO] [stdout]   |                 ^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr::NonNull`
[INFO] [stdout]  --> src/erc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::ptr::NonNull;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/erc.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `UnsafeCell`
[INFO] [stdout]  --> src/erc_box.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Cell, UnsafeCell};
[INFO] [stdout]   |                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr`
[INFO] [stdout]  --> src/ewc.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ptr;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Rc` and `Weak`
[INFO] [stdout]  --> src/ewc.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::rc::{Rc, Weak};
[INFO] [stdout]   |               ^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::erc::Erc`
[INFO] [stdout]  --> src/ref_holders.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::erc::Erc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::alloc::Allocator`
[INFO] [stdout]  --> src/erc.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::alloc::Allocator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cell` and `UnsafeCell`
[INFO] [stdout]  --> src/erc.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::cell::{Cell, UnsafeCell};
[INFO] [stdout]   |                 ^^^^  ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr::NonNull`
[INFO] [stdout]  --> src/erc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::ptr::NonNull;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/erc.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `UnsafeCell`
[INFO] [stdout]  --> src/erc_box.rs:1:23
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cell::{Cell, UnsafeCell};
[INFO] [stdout]   |                       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ptr`
[INFO] [stdout]  --> src/ewc.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ptr;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Rc` and `Weak`
[INFO] [stdout]  --> src/ewc.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::rc::{Rc, Weak};
[INFO] [stdout]   |               ^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::erc::Erc`
[INFO] [stdout]  --> src/ref_holders.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use crate::erc::Erc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]   --> src/lib.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     use std::cell::RefCell;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::borrow_error::BorrowError`
[INFO] [stdout]   --> src/lib.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     use crate::borrow_error::BorrowError;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/lib.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/erc.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let mut state = &erc_box.borrow_state();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/ref_holders.rs:27:19
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/erc.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 20 | impl <T> Erc<T> {
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 21 |     #[inline(always)]
[INFO] [stdout] 22 |     pub fn new(x: T) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `try_borrow_mut`, `get_state`, and `from_erc_box_ptr` are never used
[INFO] [stdout]   --> src/erc.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl <T: ?Sized> Erc<T> {
[INFO] [stdout]    | ----------------------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn try_borrow_mut(&self) -> Result<RefMutHolder<'_,T>, BorrowError>{
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn get_state(&self) -> &BorrowState{
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     pub(crate) fn from_erc_box_ptr(ptr:  *mut ErcBox<T>) -> Self {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `strong` is never read
[INFO] [stdout]  --> src/erc_box.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub(crate) struct ErcBox<T:?Sized> {
[INFO] [stdout]   |                   ------ field in this struct
[INFO] [stdout] 6 |     pub(crate) strong: Cell<usize>,
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/erc_box.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | impl <T> ErcBox<T> {
[INFO] [stdout]    | ------------------ associated function in this implementation
[INFO] [stdout] 13 |     pub fn new(value: T) -> Self{
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_raw_ptr` is never used
[INFO] [stdout]   --> src/erc_box.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl <T:?Sized> ErcBox<T> {
[INFO] [stdout]    | ------------------------- method in this implementation
[INFO] [stdout] 24 |     pub fn get_raw_ptr(&self) -> *mut T {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ewc.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl <T> Ewc<T>{
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 11 |     #[inline]
[INFO] [stdout] 12 |     pub const fn new() -> Ewc<T> {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `upgrade` is never used
[INFO] [stdout]   --> src/ewc.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl <T:?Sized> Ewc<T> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 18 |     pub fn upgrade(&self) -> Option<Erc<T>>
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_erc_box_ptr` is never used
[INFO] [stdout]   --> src/ref_holders.rs:46:19
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl <'a, T:?Sized> RefMutHolder<'a,T> {
[INFO] [stdout]    | -------------------------------------- associated function in this implementation
[INFO] [stdout] 46 |     pub(crate) fn from_erc_box_ptr(erc_box_ptr: *mut ErcBox<T>)->Self {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `unused`, `is_writing`, `is_reading`, `is_unused`, and `inc_writing` are never used
[INFO] [stdout]   --> src/borrow_state.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl BorrowState {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 11 |     #[inline(always)]
[INFO] [stdout] 12 |     pub fn unused() -> Self {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn is_writing(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn is_reading(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn is_unused(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 46 |     pub fn inc_writing(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/erc.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let mut state = &erc_box.borrow_state();
[INFO] [stdout]    |             ----^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/ref_holders.rs:27:19
[INFO] [stdout]    |
[INFO] [stdout] 27 |     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]   --> src/lib.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let g = Gadget::new("Ola".to_string());
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rc`
[INFO] [stdout]   --> src/lib.rs:98:13
[INFO] [stdout]    |
[INFO] [stdout] 98 |         let rc = Rc::new(String::from("Astra")) as Rc<dyn Any>;
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_rc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `erc`
[INFO] [stdout]   --> src/lib.rs:99:13
[INFO] [stdout]    |
[INFO] [stdout] 99 |         let erc = Erc::new(String::from("Astra")) as Erc<dyn Any>;
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_erc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `from_erc_box_ptr` is never used
[INFO] [stdout]   --> src/erc.rs:61:19
[INFO] [stdout]    |
[INFO] [stdout] 31 | impl <T: ?Sized> Erc<T> {
[INFO] [stdout]    | ----------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 61 |     pub(crate) fn from_erc_box_ptr(ptr:  *mut ErcBox<T>) -> Self {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `strong` is never read
[INFO] [stdout]  --> src/erc_box.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub(crate) struct ErcBox<T:?Sized> {
[INFO] [stdout]   |                   ------ field in this struct
[INFO] [stdout] 6 |     pub(crate) strong: Cell<usize>,
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `get_raw_ptr` is never used
[INFO] [stdout]   --> src/erc_box.rs:24:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl <T:?Sized> ErcBox<T> {
[INFO] [stdout]    | ------------------------- method in this implementation
[INFO] [stdout] 24 |     pub fn get_raw_ptr(&self) -> *mut T {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ewc.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl <T> Ewc<T>{
[INFO] [stdout]    | --------------- associated function in this implementation
[INFO] [stdout] 11 |     #[inline]
[INFO] [stdout] 12 |     pub const fn new() -> Ewc<T> {
[INFO] [stdout]    |                  ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `upgrade` is never used
[INFO] [stdout]   --> src/ewc.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl <T:?Sized> Ewc<T> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] 18 |     pub fn upgrade(&self) -> Option<Erc<T>>
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_writing` and `is_reading` are never used
[INFO] [stdout]   --> src/borrow_state.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl BorrowState {
[INFO] [stdout]    | ---------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn is_writing(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub fn is_reading(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `me2` are never read
[INFO] [stdout]   --> src/lib.rs:53:13
[INFO] [stdout]    |
[INFO] [stdout] 52 |         struct Gadget {
[INFO] [stdout]    |                ------ fields in this struct
[INFO] [stdout] 53 |             name: String,
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 54 |             me2: Weak<Gadget>,
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `me` is never used
[INFO] [stdout]   --> src/lib.rs:70:16
[INFO] [stdout]    |
[INFO] [stdout] 57 |         impl Gadget {
[INFO] [stdout]    |         ----------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 70 |             fn me(&self) -> Rc<Self> {
[INFO] [stdout]    |                ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 24 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "0e14fa18b694352bbb2c9073f0b5d712a9d0547a647b1a7c132671e34f9123d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e14fa18b694352bbb2c9073f0b5d712a9d0547a647b1a7c132671e34f9123d2", kill_on_drop: false }`
[INFO] [stdout] 0e14fa18b694352bbb2c9073f0b5d712a9d0547a647b1a7c132671e34f9123d2