[INFO] fetching crate comn 0.1.1...
[INFO] checking comn-0.1.1 against master#39cb3386ddc6c71657418be28dbb3987eea4aa4b for pr-133536
[INFO] extracting crate comn 0.1.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate comn 0.1.1 on toolchain 39cb3386ddc6c71657418be28dbb3987eea4aa4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate comn 0.1.1
[INFO] finished tweaking crates.io crate comn 0.1.1
[INFO] tweaked toml for crates.io crate comn 0.1.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 85 packages to latest compatible versions
[INFO] [stderr]       Adding clap v2.33.4 (available: v2.34.0)
[INFO] [stderr]       Adding ctor v0.1.26 (available: v0.2.9)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v2.33.4
[INFO] [stderr]   Downloaded comn-pms v0.1.0
[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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1ba225959e4fc1cded02ccea21a7ee857229e034f916fe15e81aabde50cd3164
[INFO] running `Command { std: "docker" "start" "-a" "1ba225959e4fc1cded02ccea21a7ee857229e034f916fe15e81aabde50cd3164", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1ba225959e4fc1cded02ccea21a7ee857229e034f916fe15e81aabde50cd3164", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ba225959e4fc1cded02ccea21a7ee857229e034f916fe15e81aabde50cd3164", kill_on_drop: false }`
[INFO] [stdout] 1ba225959e4fc1cded02ccea21a7ee857229e034f916fe15e81aabde50cd3164
[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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3743e7d9e8117a1ba0dad904f5203eee7843bbc8e332bfe9ef162587f7c2f1f
[INFO] running `Command { std: "docker" "start" "-a" "a3743e7d9e8117a1ba0dad904f5203eee7843bbc8e332bfe9ef162587f7c2f1f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking signal-hook-registry v1.4.2
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]     Checking clap v2.33.4
[INFO] [stderr]     Checking tokio v1.41.1
[INFO] [stderr]    Compiling comn-pms v0.1.0
[INFO] [stderr]    Compiling ctor v0.1.26
[INFO] [stderr]     Checking comn v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/flags.rs:33:38
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn cmd_args_list(k: &'static str) -> &mut LinkedList<item> {
[INFO] [stdout]    |                                      ^ this elided lifetime gets resolved as `'static`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] help: consider specifying it explicitly
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn cmd_args_list(k: &'static str) -> &'static mut LinkedList<item> {
[INFO] [stdout]    |                                       +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: elided lifetime has a name
[INFO] [stdout]   --> src/flags.rs:33:38
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn cmd_args_list(k: &'static str) -> &mut LinkedList<item> {
[INFO] [stdout]    |                                      ^ this elided lifetime gets resolved as `'static`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(elided_named_lifetimes)]` on by default
[INFO] [stdout] help: consider specifying it explicitly
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn cmd_args_list(k: &'static str) -> &'static mut LinkedList<item> {
[INFO] [stdout]    |                                       +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `from` that must be used
[INFO] [stdout]    --> src/flags.rs:215:13
[INFO] [stdout]     |
[INFO] [stdout] 215 |             Box::<str>::from(*ptr);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 215 |             let _ = Box::<str>::from(*ptr);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `from` that must be used
[INFO] [stdout]    --> src/flags.rs:215:13
[INFO] [stdout]     |
[INFO] [stdout] 215 |             Box::<str>::from(*ptr);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 215 |             let _ = Box::<str>::from(*ptr);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `x` should have an upper camel case name
[INFO] [stdout]    --> tests/test.rs:165:12
[INFO] [stdout]     |
[INFO] [stdout] 165 |     struct x<T> {
[INFO] [stdout]     |            ^ help: convert the identifier to upper camel case (notice the capitalization): `X`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `wrapper` should have an upper camel case name
[INFO] [stdout]  --> tests/tokio.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |     struct wrapper {
[INFO] [stdout]   |            ^^^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Wrapper`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `a` should have an upper camel case name
[INFO] [stdout]    --> tests/test.rs:180:12
[INFO] [stdout]     |
[INFO] [stdout] 180 |     struct a {
[INFO] [stdout]     |            ^ help: convert the identifier to upper camel case: `A`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stdout]   --> tests/tokio.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |         thread::sleep_ms(5000);
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stdout]   --> tests/tokio.rs:48:17
[INFO] [stdout]    |
[INFO] [stdout] 48 |         thread::sleep_ms(5000);
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stdout]   --> tests/tokio.rs:63:17
[INFO] [stdout]    |
[INFO] [stdout] 63 |         thread::sleep_ms(5000);
[INFO] [stdout]    |                 ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stdout]   --> tests/tokio.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |     thread::sleep_ms(3000);
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> tests/test.rs:281:13
[INFO] [stdout]     |
[INFO] [stdout] 281 |         let mut y = &mut x;
[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: struct `a` is never constructed
[INFO] [stdout]    --> tests/test.rs:180:12
[INFO] [stdout]     |
[INFO] [stdout] 180 |     struct a {
[INFO] [stdout]     |            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `x3` is never used
[INFO] [stdout]    --> tests/test.rs:185:8
[INFO] [stdout]     |
[INFO] [stdout] 185 |     fn x3(c: &mut a, d: a) {
[INFO] [stdout]     |        ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> tests/test.rs:222:9
[INFO] [stdout]     |
[INFO] [stdout] 222 | /         thread::spawn(move || {
[INFO] [stdout] 223 | |             let sss3 = unsafe { &mut *(sss1 as *const _ as *mut String) };
[INFO] [stdout] 224 | |             let sss4 = Box::leak(Box::new(format!("{1} {0}", i, 8)));
[INFO] [stdout] 225 | |             mem::swap(sss3, sss4);
[INFO] [stdout] 226 | |         })
[INFO] [stdout] 227 | |         .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] 222 |         let _ = thread::spawn(move || {
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: casting `&T` to `&mut T` is undefined behavior, even if the reference is unused, consider instead using an `UnsafeCell`
[INFO] [stdout]    --> tests/test.rs:223:33
[INFO] [stdout]     |
[INFO] [stdout] 223 |             let sss3 = unsafe { &mut *(sss1 as *const _ as *mut String) };
[INFO] [stdout]     |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: for more information, visit <https://doc.rust-lang.org/book/ch15-05-interior-mutability.html>
[INFO] [stdout]     = note: `#[deny(invalid_reference_casting)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` in tuple element 0 that must be used
[INFO] [stdout]   --> tests/tokio.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     tokio::join!(h1, h2, h3);
[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]    = note: this warning originates in the macro `$crate::join` which comes from the expansion of the macro `tokio::join` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` in tuple element 1 that must be used
[INFO] [stdout]   --> tests/tokio.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     tokio::join!(h1, h2, h3);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `$crate::join` which comes from the expansion of the macro `tokio::join` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` in tuple element 2 that must be used
[INFO] [stdout]   --> tests/tokio.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     tokio::join!(h1, h2, h3);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: this warning originates in the macro `$crate::join` which comes from the expansion of the macro `tokio::join` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `comn` (test "test") due to 1 previous error; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "a3743e7d9e8117a1ba0dad904f5203eee7843bbc8e332bfe9ef162587f7c2f1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3743e7d9e8117a1ba0dad904f5203eee7843bbc8e332bfe9ef162587f7c2f1f", kill_on_drop: false }`
[INFO] [stdout] a3743e7d9e8117a1ba0dad904f5203eee7843bbc8e332bfe9ef162587f7c2f1f
