[INFO] cloning repository https://github.com/ljcusack/rust-playpen
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ljcusack/rust-playpen" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fljcusack%2Frust-playpen", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fljcusack%2Frust-playpen'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] de9e77d2d9a207a506493bc2d739ac4e070c4465
[INFO] checking ljcusack/rust-playpen against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fljcusack%2Frust-playpen" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ljcusack/rust-playpen on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ljcusack/rust-playpen
[INFO] finished tweaking git repo https://github.com/ljcusack/rust-playpen
[INFO] tweaked toml for git repo https://github.com/ljcusack/rust-playpen written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ljcusack/rust-playpen already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c212eb23a5209f6625e13ed0ddd03834d878b43b293d2e85a48d16ee0824fb2e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c212eb23a5209f6625e13ed0ddd03834d878b43b293d2e85a48d16ee0824fb2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c212eb23a5209f6625e13ed0ddd03834d878b43b293d2e85a48d16ee0824fb2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c212eb23a5209f6625e13ed0ddd03834d878b43b293d2e85a48d16ee0824fb2e", kill_on_drop: false }`
[INFO] [stdout] c212eb23a5209f6625e13ed0ddd03834d878b43b293d2e85a48d16ee0824fb2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca9de7f87d38a69ebfcaaa02da71d139e5bd11224df239c644809ab2deba3167
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ca9de7f87d38a69ebfcaaa02da71d139e5bd11224df239c644809ab2deba3167", kill_on_drop: false }`
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: comparison operators cannot be chained
[INFO] [stdout]  --> src/bin/consumers.rs:3:46
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let one_to_one_hundred = (1..101).collect<Vec<i32>>();
[INFO] [stdout]   |                                              ^   ^
[INFO] [stdout]   |
[INFO] [stdout] help: use `::<...>` instead of `<...>` to specify type arguments
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let one_to_one_hundred = (1..101).collect::<Vec<i32>>();
[INFO] [stdout]   |                                              ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0423]: expected function, found macro `println`
[INFO] [stdout]  --> src/bin/consumers.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 |         Some(_) => println("Found a match!"),
[INFO] [stdout]   |                    ^^^^^^^ not a function
[INFO] [stdout]   |
[INFO] [stdout] help: use `!` to invoke the macro
[INFO] [stdout]   |
[INFO] [stdout] 8 |         Some(_) => println!("Found a match!"),
[INFO] [stdout]   |                           ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stdout]   --> src/bin/threads.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     thread::sleep_ms(50);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Morning`
[INFO] [stdout]   --> src/bin/match.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 |    Morning(i32),
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Afternoon`
[INFO] [stdout]   --> src/bin/match.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 |    Afternoon(i32),
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/loops.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut nums = vec![1, 2, 3];
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0423`.
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: comparison operators cannot be chained
[INFO] [stdout]  --> src/bin/consumers.rs:3:46
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let one_to_one_hundred = (1..101).collect<Vec<i32>>();
[INFO] [stdout]   |                                              ^   ^
[INFO] [stdout]   |
[INFO] [stdout] help: use `::<...>` instead of `<...>` to specify type arguments
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let one_to_one_hundred = (1..101).collect::<Vec<i32>>();
[INFO] [stdout]   |                                              ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `hello_world`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]  --> src/bin/memory3.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0423]: expected function, found macro `println`
[INFO] [stdout]  --> src/bin/consumers.rs:8:20
[INFO] [stdout]   |
[INFO] [stdout] 8 |         Some(_) => println("Found a match!"),
[INFO] [stdout]   |                    ^^^^^^^ not a function
[INFO] [stdout]   |
[INFO] [stdout] help: use `!` to invoke the macro
[INFO] [stdout]   |
[INFO] [stdout] 8 |         Some(_) => println!("Found a match!"),
[INFO] [stdout]   |                           ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0382]: use of moved value: `data`
[INFO] [stdout]   --> src/bin/threads.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut data = vec![1, 2, 3];
[INFO] [stdout]    |         -------- move occurs because `data` has type `Vec<i32>`, which does not implement the `Copy` trait
[INFO] [stdout] 13 |     for i in 0..3 {
[INFO] [stdout] 14 |         thread::spawn(move || {
[INFO] [stdout]    |                       ^^^^^^^ value moved into closure here, in previous iteration of loop
[INFO] [stdout] 15 |             data[i] += 1;
[INFO] [stdout]    |             ---- use occurs due to use in closure
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0382`.
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated function `std::thread::sleep_ms`: replaced by `std::thread::sleep`
[INFO] [stdout]   --> src/bin/threads.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     thread::sleep_ms(50);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `size`
[INFO] [stdout]  --> src/bin/list.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     size: i32,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `head`
[INFO] [stdout]  --> src/bin/list.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     head: Link<T>,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `item`
[INFO] [stdout]  --> src/bin/list.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 |    item: T,
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `next`
[INFO] [stdout]   --> src/bin/list.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 |    next: Link<T>,
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `fn(i32, i32) -> i32 {add}` doesn't implement `Debug`
[INFO] [stdout]   --> src/bin/fn_pointers.rs:12:32
[INFO] [stdout]    |
[INFO] [stdout] 12 |    println!("fn_ptr2: \t{:?}", fn_ptr2);
[INFO] [stdout]    |                                ^^^^^^^ `fn(i32, i32) -> i32 {add}` cannot be formatted using `{:?}` because it doesn't implement `Debug`
[INFO] [stdout] ...
[INFO] [stdout] 16 | fn add(i: i32, j: i32) -> i32 {
[INFO] [stdout]    |    --- consider calling this function
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `fn(i32, i32) -> i32 {add}`
[INFO] [stdout]    = help: use parentheses to call the function: `add(i, j)`
[INFO] [stdout]    = note: required by `std::fmt::Debug::fmt`
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Morning`
[INFO] [stdout]   --> src/bin/match.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 |    Morning(i32),
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Afternoon`
[INFO] [stdout]   --> src/bin/match.rs:12:4
[INFO] [stdout]    |
[INFO] [stdout] 12 |    Afternoon(i32),
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0423`.
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0382]: use of moved value: `data`
[INFO] [stdout]   --> src/bin/threads.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let mut data = vec![1, 2, 3];
[INFO] [stdout]    |         -------- move occurs because `data` has type `Vec<i32>`, which does not implement the `Copy` trait
[INFO] [stdout] 13 |     for i in 0..3 {
[INFO] [stdout] 14 |         thread::spawn(move || {
[INFO] [stdout]    |                       ^^^^^^^ value moved into closure here, in previous iteration of loop
[INFO] [stdout] 15 |             data[i] += 1;
[INFO] [stdout]    |             ---- use occurs due to use in closure
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0382`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ca9de7f87d38a69ebfcaaa02da71d139e5bd11224df239c644809ab2deba3167", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca9de7f87d38a69ebfcaaa02da71d139e5bd11224df239c644809ab2deba3167", kill_on_drop: false }`
[INFO] [stdout] ca9de7f87d38a69ebfcaaa02da71d139e5bd11224df239c644809ab2deba3167