[INFO] fetching crate unsafe_bst 0.3.2...
[INFO] checking unsafe_bst-0.3.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate unsafe_bst 0.3.2 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate unsafe_bst 0.3.2
[INFO] finished tweaking crates.io crate unsafe_bst 0.3.2
[INFO] tweaked toml for crates.io crate unsafe_bst 0.3.2 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate unsafe_bst 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] crate crates.io crate unsafe_bst 0.3.2 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] 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] 0b23693d0156d918a62d76cf8787be3468c2524de441b76bfc1584a946db29e6
[INFO] running `Command { std: "docker" "start" "-a" "0b23693d0156d918a62d76cf8787be3468c2524de441b76bfc1584a946db29e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b23693d0156d918a62d76cf8787be3468c2524de441b76bfc1584a946db29e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b23693d0156d918a62d76cf8787be3468c2524de441b76bfc1584a946db29e6", kill_on_drop: false }`
[INFO] [stdout] 0b23693d0156d918a62d76cf8787be3468c2524de441b76bfc1584a946db29e6
[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] 193eb818456eec333abd354d56d006b4bf7180f821ff47b5aa8a0ec78694b5f3
[INFO] running `Command { std: "docker" "start" "-a" "193eb818456eec333abd354d56d006b4bf7180f821ff47b5aa8a0ec78694b5f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking unsafe_bst v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `document-features`
[INFO] [stdout]  --> src/lib.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![cfg_attr(feature = "document-features", doc = document_features::document_features!())]
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]   |
[INFO] [stdout]   = note: no expected values for `feature`
[INFO] [stdout]   = help: consider adding `document-features` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `document-features`
[INFO] [stdout]  --> src/lib.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![cfg_attr(feature = "document-features", doc = document_features::document_features!())]
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]   |
[INFO] [stdout]   = note: no expected values for `feature`
[INFO] [stdout]   = help: consider adding `document-features` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/lib.rs:304:29
[INFO] [stdout]     |
[INFO] [stdout] 304 |             let mid:usize = ((start+end)/2).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] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/lib.rs:311:34
[INFO] [stdout]     |
[INFO] [stdout] 311 |             self.build(v, start, (mid-1).try_into().unwrap(), s);
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/lib.rs:313:27
[INFO] [stdout]     |
[INFO] [stdout] 313 |             self.build(v, (mid+1).try_into().unwrap(), end, s);
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unsafe_bst` (lib) due to 3 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/lib.rs:304:29
[INFO] [stdout]     |
[INFO] [stdout] 304 |             let mid:usize = ((start+end)/2).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] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/lib.rs:311:34
[INFO] [stdout]     |
[INFO] [stdout] 311 |             self.build(v, start, (mid-1).try_into().unwrap(), s);
[INFO] [stdout]     |                                  ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<usize, Infallible>
[INFO] [stdout]    --> src/lib.rs:313:27
[INFO] [stdout]     |
[INFO] [stdout] 313 |             self.build(v, (mid+1).try_into().unwrap(), end, s);
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unsafe_bst` (lib test) due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "193eb818456eec333abd354d56d006b4bf7180f821ff47b5aa8a0ec78694b5f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "193eb818456eec333abd354d56d006b4bf7180f821ff47b5aa8a0ec78694b5f3", kill_on_drop: false }`
[INFO] [stdout] 193eb818456eec333abd354d56d006b4bf7180f821ff47b5aa8a0ec78694b5f3
