[INFO] fetching crate cyclic_data_types 0.2.3...
[INFO] checking cyclic_data_types-0.2.3 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate cyclic_data_types 0.2.3 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate cyclic_data_types 0.2.3
[INFO] finished tweaking crates.io crate cyclic_data_types 0.2.3
[INFO] tweaked toml for crates.io crate cyclic_data_types 0.2.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cyclic_data_types 0.2.3 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 78 packages to latest compatible versions
[INFO] [stderr]       Adding arraydeque v0.4.5 (available: v0.5.1)
[INFO] [stderr]       Adding criterion v0.4.0 (available: v0.7.0)
[INFO] [stderr]       Adding ringbuffer v0.11.1 (available: v0.16.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f9c561f47090a8641249f83baec6925540ad8ef88a666257ae098f85e0515a25
[INFO] running `Command { std: "docker" "start" "-a" "f9c561f47090a8641249f83baec6925540ad8ef88a666257ae098f85e0515a25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9c561f47090a8641249f83baec6925540ad8ef88a666257ae098f85e0515a25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9c561f47090a8641249f83baec6925540ad8ef88a666257ae098f85e0515a25", kill_on_drop: false }`
[INFO] [stdout] f9c561f47090a8641249f83baec6925540ad8ef88a666257ae098f85e0515a25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49d354a2050990e029305b5b11b50f56170acb514fcd9219c64887fa10795e7e
[INFO] running `Command { std: "docker" "start" "-a" "49d354a2050990e029305b5b11b50f56170acb514fcd9219c64887fa10795e7e", kill_on_drop: false }`
[INFO] [stderr]    Compiling circular-queue v0.2.7
[INFO] [stderr]     Checking typewit v1.14.2
[INFO] [stderr]    Compiling arraydeque v0.4.5
[INFO] [stderr]     Checking arrayvec v0.7.6
[INFO] [stderr]     Checking ring_queue v0.2.0
[INFO] [stderr]     Checking cyclic_data_types v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stdout] warning: associated function `new_empty` is never used
[INFO] [stdout]   --> src/lib.rs:33:26
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl<const SIZE: usize, T, const WRITE_OVER: bool> CyclicList<SIZE, T, WRITE_OVER> {
[INFO] [stdout]    | ---------------------------------------------------------------------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub(crate) unsafe fn new_empty(initializer: fn()->T) -> Self{
[INFO] [stdout]    |                          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/list/mod.rs:510:17
[INFO] [stdout]     |
[INFO] [stdout] 510 |     pub fn iter(&self) -> Iter<SIZE, T, WRITE_OVER> where Self: Sized {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 510 |     pub fn iter(&self) -> Iter<'_, SIZE, T, WRITE_OVER> where Self: Sized {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stderr]     Checking const_panic v0.2.15
[INFO] [stderr]     Checking ringbuffer v0.11.1
[INFO] [stdout] warning: associated function `new_empty` is never used
[INFO] [stdout]   --> src/lib.rs:33:26
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl<const SIZE: usize, T, const WRITE_OVER: bool> CyclicList<SIZE, T, WRITE_OVER> {
[INFO] [stdout]    | ---------------------------------------------------------------------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub(crate) unsafe fn new_empty(initializer: fn()->T) -> Self{
[INFO] [stdout]    |                          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/list/mod.rs:510:17
[INFO] [stdout]     |
[INFO] [stdout] 510 |     pub fn iter(&self) -> Iter<SIZE, T, WRITE_OVER> where Self: Sized {
[INFO] [stdout]     |                 ^^^^^     ^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 the lifetime is elided here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 510 |     pub fn iter(&self) -> Iter<'_, SIZE, T, WRITE_OVER> where Self: Sized {
[INFO] [stdout]     |                                +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<Stack<5, i64, true>, Infallible>
[INFO] [stdout]    --> src/stack/tests.rs:102:22
[INFO] [stdout]     |
[INFO] [stdout] 102 |         let expect = [2,3,4,5,6].try_into().unwrap();
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cyclic_data_types` (lib test) due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "49d354a2050990e029305b5b11b50f56170acb514fcd9219c64887fa10795e7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49d354a2050990e029305b5b11b50f56170acb514fcd9219c64887fa10795e7e", kill_on_drop: false }`
[INFO] [stdout] 49d354a2050990e029305b5b11b50f56170acb514fcd9219c64887fa10795e7e
