[INFO] cloning repository https://github.com/weykon/rust-data-structure
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/weykon/rust-data-structure" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweykon%2Frust-data-structure", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweykon%2Frust-data-structure'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ccfa262712de1af898e9dedd14a0b05b93fd4e18
[INFO] checking weykon/rust-data-structure against master#3350c1eb3fd8fe1bee1ed4c76944d707bd256876 for pr-140558
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweykon%2Frust-data-structure" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/weykon/rust-data-structure on toolchain 3350c1eb3fd8fe1bee1ed4c76944d707bd256876
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/weykon/rust-data-structure
[INFO] finished tweaking git repo https://github.com/weykon/rust-data-structure
[INFO] tweaked toml for git repo https://github.com/weykon/rust-data-structure written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/weykon/rust-data-structure 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" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5043a91eadaf0661e68fd8d0c6ff369442a9ea793c18b0372a556940b6178612
[INFO] running `Command { std: "docker" "start" "-a" "5043a91eadaf0661e68fd8d0c6ff369442a9ea793c18b0372a556940b6178612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5043a91eadaf0661e68fd8d0c6ff369442a9ea793c18b0372a556940b6178612", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5043a91eadaf0661e68fd8d0c6ff369442a9ea793c18b0372a556940b6178612", kill_on_drop: false }`
[INFO] [stdout] 5043a91eadaf0661e68fd8d0c6ff369442a9ea793c18b0372a556940b6178612
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+3350c1eb3fd8fe1bee1ed4c76944d707bd256876" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8181952e70125deccde24616e34f43e19a8ef2e4d49b1bc2df80928798a9520
[INFO] running `Command { std: "docker" "start" "-a" "f8181952e70125deccde24616e34f43e19a8ef2e4d49b1bc2df80928798a9520", kill_on_drop: false }`
[INFO] [stderr]     Checking pointer v0.1.0 (/opt/rustwide/workdir/pointer)
[INFO] [stderr]     Checking how_understand_deref v0.1.0 (/opt/rustwide/workdir/how_understand_deref)
[INFO] [stderr]     Checking shirt_store v0.1.0 (/opt/rustwide/workdir/shirt_store)
[INFO] [stderr]     Checking unsafe_split v0.1.0 (/opt/rustwide/workdir/unsafe_split)
[INFO] [stderr]     Checking double_channel_pointer_at_for v0.1.0 (/opt/rustwide/workdir/double_channel_pointer_at_for)
[INFO] [stderr]     Checking option_and_box v0.1.0 (/opt/rustwide/workdir/option_and_box)
[INFO] [stderr]     Checking ref_and_owner_borrow_rwo v0.1.0 (/opt/rustwide/workdir/ref_and_owner_borrow_rwo)
[INFO] [stderr]     Checking stack v0.1.0 (/opt/rustwide/workdir/stack)
[INFO] [stderr]     Checking blog_post v0.1.0 (/opt/rustwide/workdir/blog_post)
[INFO] [stderr]     Checking dyn_prog v0.1.0 (/opt/rustwide/workdir/dyn_prog)
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]   --> how_understand_deref/src/main.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let num = &v[2];
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `l`
[INFO] [stdout]  --> ref_and_owner_borrow_rwo/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let l = 1;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_l`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> ref_and_owner_borrow_rwo/src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let a = *r;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ref_deref_ref_s`
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let ref_deref_ref_s = &*ref_s;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_deref_ref_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     x += z;
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let a = *b;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ref_to_option`
[INFO] [stdout]   --> option_and_box/src/main.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let ref_to_option = &*option_ref;
[INFO] [stdout]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_to_option`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ref_v`
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let ref_v = &v;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut s = Box::new(2);
[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: variable does not need to be mutable
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let mut b = Box::new(2);
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut v = String::new();
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rust-data-structure v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `ref_to_one`
[INFO] [stdout]   --> option_and_box/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let ref_to_one = *option_ref;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_to_one`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `option_and_ref_one`
[INFO] [stdout]   --> option_and_box/src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let option_and_ref_one = aa.as_ref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_option_and_ref_one`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `keep_option_with_box_deref_into_one`
[INFO] [stdout]   --> option_and_box/src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let keep_option_with_box_deref_into_one = aa.as_deref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_keep_option_with_box_deref_into_one`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `l`
[INFO] [stdout]  --> ref_and_owner_borrow_rwo/src/main.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let l = 1;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_l`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> ref_and_owner_borrow_rwo/src/main.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let a = *r;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ref_deref_ref_s`
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let ref_deref_ref_s = &*ref_s;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_deref_ref_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     x += z;
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let a = *b;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ref_v`
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let ref_v = &v;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut s = Box::new(2);
[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: variable does not need to be mutable
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let mut b = Box::new(2);
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> ref_and_owner_borrow_rwo/src/main.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut v = String::new();
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order_0`
[INFO] [stdout]   --> shirt_store/src/main.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let order_0 = store.giveaway(Some(ShirtColor::Blue));
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_order_0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order_1`
[INFO] [stdout]   --> shirt_store/src/main.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let order_1 = store.giveaway(Some(ShirtColor::Red));
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_order_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order_2`
[INFO] [stdout]   --> shirt_store/src/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let order_2 = store.giveaway(Some(ShirtColor::Red));
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_order_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order_3`
[INFO] [stdout]   --> shirt_store/src/main.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let order_3 = store.giveaway(None);
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_order_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> blog_post/src/main.rs:67:27
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `reject` and `content` are never used
[INFO] [stdout]   --> blog_post/src/main.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | trait State {
[INFO] [stdout]    |       ----- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 66 |     fn reject(self: Box<Self>) -> Box<dyn State>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 67 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `first::*`
[INFO] [stdout]  --> stack/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use first::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ref_or_owner_check_type v0.1.0 (/opt/rustwide/workdir/ref_or_owner_check_type)
[INFO] [stdout] warning: unused variable: `order_0`
[INFO] [stdout]   --> shirt_store/src/main.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let order_0 = store.giveaway(Some(ShirtColor::Blue));
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_order_0`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order_1`
[INFO] [stdout]   --> shirt_store/src/main.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let order_1 = store.giveaway(Some(ShirtColor::Red));
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_order_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order_2`
[INFO] [stdout]   --> shirt_store/src/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let order_2 = store.giveaway(Some(ShirtColor::Red));
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_order_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `order_3`
[INFO] [stdout]   --> shirt_store/src/main.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let order_3 = store.giveaway(None);
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_order_3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `iter` is never used
[INFO] [stdout]   --> stack/src/second_ok_stack.rs:85:12
[INFO] [stdout]    |
[INFO] [stdout] 84 | impl<T> List<T> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 85 |     pub fn iter(&self) -> Iter<T> {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `iter_mut` is never used
[INFO] [stdout]    --> stack/src/second_ok_stack.rs:107:12
[INFO] [stdout]     |
[INFO] [stdout] 106 | impl<T> List<T> {
[INFO] [stdout]     | --------------- method in this implementation
[INFO] [stdout] 107 |     pub fn iter_mut(&mut self) -> IterMut<'_, T> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `first::*`
[INFO] [stdout]  --> stack/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use first::*;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not parse/generate dep info at: /opt/rustwide/target/debug/deps/rust_data_structure-bc517b4df217214c.d
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to write `/opt/rustwide/target/debug/.fingerprint/rust-data-structure-bc517b4df217214c/dep-bin-rust-data-structure`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not parse/generate dep info at: /opt/rustwide/target/debug/deps/shirt_store-894dd5ff549de6c7.d
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to write `/opt/rustwide/target/debug/.fingerprint/shirt_store-894dd5ff549de6c7/dep-bin-shirt_store`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] error: could not parse/generate dep info at: /opt/rustwide/target/debug/deps/blog_post-8addeea9f7ef7b6f.d
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to write `/opt/rustwide/target/debug/.fingerprint/blog_post-8addeea9f7ef7b6f/dep-bin-blog_post`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] error: could not parse/generate dep info at: /opt/rustwide/target/debug/deps/stack-7c38149d4fc95bec.d
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to write `/opt/rustwide/target/debug/.fingerprint/stack-7c38149d4fc95bec/dep-test-bin-stack`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] error: could not parse/generate dep info at: /opt/rustwide/target/debug/deps/unsafe_split-1543726f147453e4.d
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to write `/opt/rustwide/target/debug/.fingerprint/unsafe_split-1543726f147453e4/dep-bin-unsafe_split`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stdout] error: couldn't create a temp dir: No space left on device (os error 28) at path "/opt/rustwide/target/debug/deps/rmetapQGMG3"
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `stack` (bin "stack"); 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   No space left on device (os error 28)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse process output: `/opt/rustwide/rustup-home/toolchains/3350c1eb3fd8fe1bee1ed4c76944d707bd256876/bin/rustc --crate-name stack --edition=2021 stack/src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=f40467c7e0af30c4 -C extra-filename=-4977b842c704f98b --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints=forbid` (exit status: 1)
[INFO] [stderr] error: could not compile `dyn_prog` (bin "dyn_prog" test) due to 1 previous error
[INFO] [stdout] warning: unused variable: `ref_imm`
[INFO] [stdout]   --> pointer/src/lib.rs:46:13
[INFO] [stdout]    |
[INFO] [stdout] 46 |         let ref_imm: &u32 = &*p_imm;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_imm`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ref_mut`
[INFO] [stdout]   --> pointer/src/lib.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |         let ref_mut: &mut u32 = &mut *p_mut;
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s5` is never read
[INFO] [stdout]   --> ref_or_owner_check_type/src/main.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut s5 = String::new();
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> blog_post/src/main.rs:67:27
[INFO] [stdout]    |
[INFO] [stdout] 67 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `reject` and `content` are never used
[INFO] [stdout]   --> blog_post/src/main.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | trait State {
[INFO] [stdout]    |       ----- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 66 |     fn reject(self: Box<Self>) -> Box<dyn State>;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 67 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num`
[INFO] [stdout]   --> how_understand_deref/src/main.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let num = &v[2];
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_num`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `s5` is never read
[INFO] [stdout]   --> ref_or_owner_check_type/src/main.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let mut s5 = String::new();
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f8181952e70125deccde24616e34f43e19a8ef2e4d49b1bc2df80928798a9520", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8181952e70125deccde24616e34f43e19a8ef2e4d49b1bc2df80928798a9520", kill_on_drop: false }`
[INFO] [stdout] f8181952e70125deccde24616e34f43e19a8ef2e4d49b1bc2df80928798a9520
