[INFO] cloning repository https://github.com/zhaomo08/rust_learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zhaomo08/rust_learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhaomo08%2Frust_learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhaomo08%2Frust_learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d80bc25d46cd0a223e957f493140d819f5a309e3
[INFO] checking zhaomo08/rust_learn against try#8c500c7cefd54fd11d57295f3771d576be9ee415 for pr-145113
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzhaomo08%2Frust_learn" "/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/zhaomo08/rust_learn
[INFO] finished tweaking git repo https://github.com/zhaomo08/rust_learn
[INFO] tweaked toml for git repo https://github.com/zhaomo08/rust_learn written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/zhaomo08/rust_learn on toolchain 8c500c7cefd54fd11d57295f3771d576be9ee415
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c500c7cefd54fd11d57295f3771d576be9ee415" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/zhaomo08/rust_learn 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" "+8c500c7cefd54fd11d57295f3771d576be9ee415" "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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+8c500c7cefd54fd11d57295f3771d576be9ee415" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 56dcb0fddbcc1f3e719947e462db6f4994bf5fafca7e7777d3e9e1fbee0299e3
[INFO] running `Command { std: "docker" "start" "-a" "56dcb0fddbcc1f3e719947e462db6f4994bf5fafca7e7777d3e9e1fbee0299e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "56dcb0fddbcc1f3e719947e462db6f4994bf5fafca7e7777d3e9e1fbee0299e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56dcb0fddbcc1f3e719947e462db6f4994bf5fafca7e7777d3e9e1fbee0299e3", kill_on_drop: false }`
[INFO] [stdout] 56dcb0fddbcc1f3e719947e462db6f4994bf5fafca7e7777d3e9e1fbee0299e3
[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:ae6f63d130afcfff7f91f5ba9fdb2a74d52830289c6a2ea2d23a94dcfb480a0d" "/opt/rustwide/cargo-home/bin/cargo" "+8c500c7cefd54fd11d57295f3771d576be9ee415" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2d644df956066673ea9eae7c6fe4140ab65cef28b3652fcb450f320a556c7e15
[INFO] running `Command { std: "docker" "start" "-a" "2d644df956066673ea9eae7c6fe4140ab65cef28b3652fcb450f320a556c7e15", kill_on_drop: false }`
[INFO] [stderr]     Checking RUST_LEARN v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::f32::consts::E`
[INFO] [stdout]  --> src/bin/can_fix.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::f32::consts::E;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future`
[INFO] [stdout]  --> src/bin/system-time.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::future;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::sleep`
[INFO] [stdout]  --> src/bin/system-time.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread::sleep;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `y` and `z` are never read
[INFO] [stdout]  --> src/bin/struct_generic.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Point<T,U >{
[INFO] [stdout]   |        ----- fields in this struct
[INFO] [stdout] 2 |     x: T,
[INFO] [stdout] 3 |     y: T,
[INFO] [stdout]   |     ^
[INFO] [stdout] 4 |     z: U,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::slice`
[INFO] [stdout]  --> src/bin/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use core::slice;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::net::IpAddr`
[INFO] [stdout]  --> src/bin/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::net::IpAddr;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]  --> src/bin/main2.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Point {
[INFO] [stdout]   |        ----- field in this struct
[INFO] [stdout] 3 |     x :u64,
[INFO] [stdout] 4 |     y :u64,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]  --> src/bin/main2.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Point {
[INFO] [stdout]   |        ----- field in this struct
[INFO] [stdout] 3 |     x :u64,
[INFO] [stdout] 4 |     y :u64,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]  --> src/bin/ownership.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let s2: String;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]  --> src/bin/ownership.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let s2 = s1;
[INFO] [stdout]   |             ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/function.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | /    thread::spawn(move || {
[INFO] [stdout] 15 | |         println!("{}",hello_message);
[INFO] [stdout] 16 | |    }).join();
[INFO] [stdout]    | |____________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 14 |    let _ = thread::spawn(move || {
[INFO] [stdout]    |    +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/bin/main.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let index= "5".parse::<usize>().unwrap();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unit`
[INFO] [stdout]    --> src/bin/main.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     let unit = Unit;
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_unit`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/bin/main.rs:127:9
[INFO] [stdout]     |
[INFO] [stdout] 127 |     let a = if cond {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `IPV6` is never constructed
[INFO] [stdout]   --> src/bin/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum IPAddr {
[INFO] [stdout]    |      ------ variant in this enum
[INFO] [stdout] 13 |     IPv4(u8,u8,u8,u8),
[INFO] [stdout] 14 |     IPV6(u8,u8,u8,u8,u8,u8,u8,u8,u8,u8,u8,u8,u8,u8,u8,u8)
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Number` is never constructed
[INFO] [stdout]   --> src/bin/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | enum Symbol {
[INFO] [stdout]    |      ------ variant in this enum
[INFO] [stdout] 18 |     Char(char),
[INFO] [stdout] 19 |     Number,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0382]: borrow of moved value: `s1`
[INFO] [stdout]  --> src/bin/ownership.rs:7:23
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let s1 = String::from("Hello World");
[INFO] [stdout]   |             -- move occurs because `s1` has type `String`, which does not implement the `Copy` trait
[INFO] [stdout] 6 |         let s2 = s1;
[INFO] [stdout]   |                  -- value moved here
[INFO] [stdout] 7 |         println!("{}",s1);
[INFO] [stdout]   |                       ^^ value borrowed here after move
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: consider cloning the value if the performance cost is acceptable
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let s2 = s1.clone();
[INFO] [stdout]   |                    ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0382`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `RUST_LEARN` (bin "ownership" test) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/bin/panic.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add(a: u32,b:u32) ->u32{
[INFO] [stdout]   |        ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/bin/panic.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add(a: u32,b:u32) ->u32{
[INFO] [stdout]   |               ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]   --> src/bin/struct_generic_three.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout]  6 | impl<T: Clone + std::cmp::PartialOrd> Point<T> {
[INFO] [stdout]    | ---------------------------------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn x(&self) -> &T {
[INFO] [stdout]    |        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::future`
[INFO] [stdout]  --> src/bin/system-time.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::future;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::thread::sleep`
[INFO] [stdout]  --> src/bin/system-time.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::thread::sleep;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MESSAGE` is never used
[INFO] [stdout]  --> src/bin/mod.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 |      pub const MESSAGE: &str = "Hello World";
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_box`
[INFO] [stdout]   --> src/bin/box.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let a_box = Box::new(a);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_a_box`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_box`
[INFO] [stdout]   --> src/bin/box.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let a_box = Box::new([0;1023 * 512]);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_a_box`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/bin/box.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let f = std::fs::read("/tmp/not_exist")?;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function` is never used
[INFO] [stdout]   --> src/bin/super_self.rs:10:16
[INFO] [stdout]    |
[INFO] [stdout] 10 |         pub fn function() {
[INFO] [stdout]    |                ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `List` is never used
[INFO] [stdout]   --> src/bin/box.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum List {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/bin/panic.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add(a: u32,b:u32) ->u32{
[INFO] [stdout]   |    ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MESSAGE` is never used
[INFO] [stdout]  --> src/bin/mod.rs:2:16
[INFO] [stdout]   |
[INFO] [stdout] 2 |      pub const MESSAGE: &str = "Hello World";
[INFO] [stdout]   |                ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/bin/panic.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add(a: u32,b:u32) ->u32{
[INFO] [stdout]   |        ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]  --> src/bin/panic.rs:1:15
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add(a: u32,b:u32) ->u32{
[INFO] [stdout]   |               ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/bin/panic.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add(a: u32,b:u32) ->u32{
[INFO] [stdout]   |    ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2d644df956066673ea9eae7c6fe4140ab65cef28b3652fcb450f320a556c7e15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d644df956066673ea9eae7c6fe4140ab65cef28b3652fcb450f320a556c7e15", kill_on_drop: false }`
[INFO] [stdout] 2d644df956066673ea9eae7c6fe4140ab65cef28b3652fcb450f320a556c7e15