[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 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsibkit%2Ferc" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[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-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sibkit/erc on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 424f4233bede2ce07e384d866b443ee875908c6639cd5a475e67aef46f95801d
[INFO] running `Command { std: "docker" "start" "-a" "424f4233bede2ce07e384d866b443ee875908c6639cd5a475e67aef46f95801d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "424f4233bede2ce07e384d866b443ee875908c6639cd5a475e67aef46f95801d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "424f4233bede2ce07e384d866b443ee875908c6639cd5a475e67aef46f95801d", kill_on_drop: false }`
[INFO] [stdout] 424f4233bede2ce07e384d866b443ee875908c6639cd5a475e67aef46f95801d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55f55e8b8df1f3cfe5c1f13adf122ea2c50822310b8410b8897f69b9bd220d3f
[INFO] running `Command { std: "docker" "start" "-a" "55f55e8b8df1f3cfe5c1f13adf122ea2c50822310b8410b8897f69b9bd220d3f", kill_on_drop: false }`
[INFO] [stderr]     Checking erc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(dispatch_from_dyn)]
[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)]` (part of `#[warn(unused)]`) 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: 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(dispatch_from_dyn)]
[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)]` (part of `#[warn(unused)]`) 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: 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `erc` (lib) due to 1 previous error; 10 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) 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] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `erc` (lib test) due to 1 previous error; 16 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "55f55e8b8df1f3cfe5c1f13adf122ea2c50822310b8410b8897f69b9bd220d3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55f55e8b8df1f3cfe5c1f13adf122ea2c50822310b8410b8897f69b9bd220d3f", kill_on_drop: false }`
[INFO] [stdout] 55f55e8b8df1f3cfe5c1f13adf122ea2c50822310b8410b8897f69b9bd220d3f
