[INFO] fetching crate muda 0.17.1...
[INFO] checking muda-0.17.1 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate muda 0.17.1 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate muda 0.17.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate muda 0.17.1
[INFO] tweaked toml for crates.io crate muda 0.17.1 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate muda 0.17.1 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] crate crates.io crate muda 0.17.1 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 896f4e79a93c995c9e11481b2db783f142c9ab4b62381d55938d1f9c4d952505
[INFO] running `Command { std: "docker" "start" "-a" "896f4e79a93c995c9e11481b2db783f142c9ab4b62381d55938d1f9c4d952505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "896f4e79a93c995c9e11481b2db783f142c9ab4b62381d55938d1f9c4d952505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "896f4e79a93c995c9e11481b2db783f142c9ab4b62381d55938d1f9c4d952505", kill_on_drop: false }`
[INFO] [stdout] 896f4e79a93c995c9e11481b2db783f142c9ab4b62381d55938d1f9c4d952505
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 3451d89915c467b1f2b2cb3824f7618fcd4e2ef0faaeafad0d00a18d294297c1
[INFO] running `Command { std: "docker" "start" "-a" "3451d89915c467b1f2b2cb3824f7618fcd4e2ef0faaeafad0d00a18d294297c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling winnow v0.5.40
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[INFO] [stderr]     Checking muda v0.17.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<MenuId, Infallible>
[INFO] [stdout]   --> src/menu_id.rs:30:66
[INFO] [stdout]    |
[INFO] [stdout] 30 |       fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
[INFO] [stdout]    |  __________________________________________________________________^
[INFO] [stdout] 31 | |         Ok(Self::new(s))
[INFO] [stdout] 32 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<MenuId, Infallible>
[INFO] [stdout]   --> src/menu_id.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |         Ok(Self::new(s))
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/platform_impl/mod.rs:91:25
[INFO] [stdout]    |
[INFO] [stdout] 91 |     pub(crate) fn child(&self) -> Ref<MenuChild> {
[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] 91 |     pub(crate) fn child(&self) -> Ref<'_, MenuChild> {
[INFO] [stdout]    |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/platform_impl/mod.rs:101:29
[INFO] [stdout]     |
[INFO] [stdout] 101 |     pub(crate) fn child_mut(&self) -> RefMut<MenuChild> {
[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] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 101 |     pub(crate) fn child_mut(&self) -> RefMut<'_, MenuChild> {
[INFO] [stdout]     |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `muda` (lib) due to 2 previous errors; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "3451d89915c467b1f2b2cb3824f7618fcd4e2ef0faaeafad0d00a18d294297c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3451d89915c467b1f2b2cb3824f7618fcd4e2ef0faaeafad0d00a18d294297c1", kill_on_drop: false }`
[INFO] [stdout] 3451d89915c467b1f2b2cb3824f7618fcd4e2ef0faaeafad0d00a18d294297c1