[INFO] fetching crate elysees 0.3.2...
[INFO] checking elysees-0.3.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate elysees 0.3.2 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate elysees 0.3.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate elysees 0.3.2
[INFO] tweaked toml for crates.io crate elysees 0.3.2 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate elysees 0.3.2 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 14 packages to latest compatible versions
[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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 4ba392f4e66cf8a99be0179c7c2bb6f02d2dc1beec16e8746ddd1c0c5510cc66
[INFO] running `Command { std: "docker" "start" "-a" "4ba392f4e66cf8a99be0179c7c2bb6f02d2dc1beec16e8746ddd1c0c5510cc66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ba392f4e66cf8a99be0179c7c2bb6f02d2dc1beec16e8746ddd1c0c5510cc66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ba392f4e66cf8a99be0179c7c2bb6f02d2dc1beec16e8746ddd1c0c5510cc66", kill_on_drop: false }`
[INFO] [stdout] 4ba392f4e66cf8a99be0179c7c2bb6f02d2dc1beec16e8746ddd1c0c5510cc66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 6493d6df0a506093f2b479dc640c77ffcfdfc0559611bc21749e2f8132b49ca6
[INFO] running `Command { std: "docker" "start" "-a" "6493d6df0a506093f2b479dc640c77ffcfdfc0559611bc21749e2f8132b49ca6", kill_on_drop: false }`
[INFO] [stderr]    Compiling erasable v1.3.0
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling slice-dst v1.6.0
[INFO] [stderr]    Compiling unsize v1.1.0
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking arc-swap v1.7.1
[INFO] [stderr]     Checking elysees v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<arc::Arc<S>, Infallible>
[INFO] [stdout]    --> src/arc.rs:711:15
[INFO] [stdout]     |
[INFO] [stdout] 711 |         match Self::try_new_slice_dst(len, init) {
[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<unique_arc::ArcBox<S>, Infallible>
[INFO] [stdout]    --> src/unique_arc.rs:238:15
[INFO] [stdout]     |
[INFO] [stdout] 238 |         match Self::try_new_slice_dst(len, init) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `elysees` (lib test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<arc::Arc<S>, Infallible>
[INFO] [stdout]    --> src/arc.rs:711:15
[INFO] [stdout]     |
[INFO] [stdout] 711 |         match Self::try_new_slice_dst(len, init) {
[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<unique_arc::ArcBox<S>, Infallible>
[INFO] [stdout]    --> src/unique_arc.rs:238:15
[INFO] [stdout]     |
[INFO] [stdout] 238 |         match Self::try_new_slice_dst(len, init) {
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `elysees` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "6493d6df0a506093f2b479dc640c77ffcfdfc0559611bc21749e2f8132b49ca6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6493d6df0a506093f2b479dc640c77ffcfdfc0559611bc21749e2f8132b49ca6", kill_on_drop: false }`
[INFO] [stdout] 6493d6df0a506093f2b479dc640c77ffcfdfc0559611bc21749e2f8132b49ca6