[INFO] fetching crate unsync 0.1.2...
[INFO] checking unsync-0.1.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate unsync 0.1.2 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate unsync 0.1.2
[INFO] finished tweaking crates.io crate unsync 0.1.2
[INFO] tweaked toml for crates.io crate unsync 0.1.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate unsync 0.1.2 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 73 packages to latest compatible versions
[INFO] [stderr]       Adding criterion v0.4.0 (available: v0.7.0)
[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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ea02ee2bb38b5c6063801ed13d589e3ab9da6de00facd82fd073c72782fff8f3
[INFO] running `Command { std: "docker" "start" "-a" "ea02ee2bb38b5c6063801ed13d589e3ab9da6de00facd82fd073c72782fff8f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea02ee2bb38b5c6063801ed13d589e3ab9da6de00facd82fd073c72782fff8f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea02ee2bb38b5c6063801ed13d589e3ab9da6de00facd82fd073c72782fff8f3", kill_on_drop: false }`
[INFO] [stdout] ea02ee2bb38b5c6063801ed13d589e3ab9da6de00facd82fd073c72782fff8f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] c8ccb8aa90720512295d83b3d126e50b79538a6c2f46b5e9f38d2142ee52c404
[INFO] running `Command { std: "docker" "start" "-a" "c8ccb8aa90720512295d83b3d126e50b79538a6c2f46b5e9f38d2142ee52c404", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling unicode-ident v1.0.22
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]    Compiling autocfg v1.5.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling zerocopy v0.8.27
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]     Checking either v1.15.0
[INFO] [stderr]     Checking cfg-if v1.0.4
[INFO] [stderr]    Compiling rayon-core v1.13.0
[INFO] [stderr]     Checking plotters-backend v0.3.7
[INFO] [stderr]     Checking itoa v1.0.15
[INFO] [stderr]     Checking memchr v2.7.6
[INFO] [stderr]     Checking regex-syntax v0.8.8
[INFO] [stderr]     Checking os_str_bytes v6.6.1
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking ryu v1.0.20
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking textwrap v0.16.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking plotters-svg v0.3.7
[INFO] [stderr]     Checking lazy_static v1.5.0
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking walkdir v2.5.0
[INFO] [stderr]     Checking pin-project-lite v0.2.16
[INFO] [stderr]     Checking oorandom v11.1.5
[INFO] [stderr]     Checking slab v0.4.11
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking unsync v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/broad_rc.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |             let mut inner = &mut (*self.inner.as_ptr());
[INFO] [stdout]    |                 ----^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stdout] error: this type will no longer be must used: Result<&T, Infallible>
[INFO] [stdout]    --> src/once_cell.rs:209:15
[INFO] [stdout]     |
[INFO] [stdout] 209 |           match self
[INFO] [stdout]     |  _______________^
[INFO] [stdout] 210 | |             .get_or_try_init(|| async { Ok::<_, Infallible>(f().await) })
[INFO] [stdout] 211 | |             .await
[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: Result<&T, Infallible>
[INFO] [stdout]    --> src/once_cell.rs:211:14
[INFO] [stdout]     |
[INFO] [stdout] 211 |             .await
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<&T, Infallible>
[INFO] [stdout]    --> src/once_cell.rs:209:15
[INFO] [stdout]     |
[INFO] [stdout] 209 |           match self
[INFO] [stdout]     |  _______________^
[INFO] [stdout] 210 | |             .get_or_try_init(|| async { Ok::<_, Infallible>(f().await) })
[INFO] [stdout] 211 | |             .await
[INFO] [stdout]     | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unsync` (lib) due to 3 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c8ccb8aa90720512295d83b3d126e50b79538a6c2f46b5e9f38d2142ee52c404", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8ccb8aa90720512295d83b3d126e50b79538a6c2f46b5e9f38d2142ee52c404", kill_on_drop: false }`
[INFO] [stdout] c8ccb8aa90720512295d83b3d126e50b79538a6c2f46b5e9f38d2142ee52c404