[INFO] fetching crate bubbletree 0.1.2...
[INFO] checking bubbletree-0.1.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate bubbletree 0.1.2 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate bubbletree 0.1.2
[INFO] finished tweaking crates.io crate bubbletree 0.1.2
[INFO] tweaked toml for crates.io crate bubbletree 0.1.2 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate bubbletree 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 26 packages to latest compatible versions
[INFO] [stderr]       Adding ordered-float v4.6.0 (available: v5.1.0)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[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] b84cbce8c1f696ee57ffd1f8ffaa7f5de723f12a0ceb5da8c9b5c88b27bc5336
[INFO] running `Command { std: "docker" "start" "-a" "b84cbce8c1f696ee57ffd1f8ffaa7f5de723f12a0ceb5da8c9b5c88b27bc5336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b84cbce8c1f696ee57ffd1f8ffaa7f5de723f12a0ceb5da8c9b5c88b27bc5336", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b84cbce8c1f696ee57ffd1f8ffaa7f5de723f12a0ceb5da8c9b5c88b27bc5336", kill_on_drop: false }`
[INFO] [stdout] b84cbce8c1f696ee57ffd1f8ffaa7f5de723f12a0ceb5da8c9b5c88b27bc5336
[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] 8c4735a66ba1bf93589ab53e117f8e377583b4cc1464dc43b1b8d754e2a144eb
[INFO] running `Command { std: "docker" "start" "-a" "8c4735a66ba1bf93589ab53e117f8e377583b4cc1464dc43b1b8d754e2a144eb", kill_on_drop: false }`
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking indexmap v2.12.0
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking conv v0.3.3
[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 priority-queue v2.7.0
[INFO] [stderr]     Checking ordered-float v4.6.0
[INFO] [stderr]     Checking bubbletree v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<f64, NoError>
[INFO] [stdout]   --> src/bubble.rs:95:17
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let n = f64::value_from(self.n).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 `bubbletree` (lib test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<f64, NoError>
[INFO] [stdout]   --> src/bubble.rs:95:17
[INFO] [stdout]    |
[INFO] [stdout] 95 |         let n = f64::value_from(self.n).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 `bubbletree` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "8c4735a66ba1bf93589ab53e117f8e377583b4cc1464dc43b1b8d754e2a144eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c4735a66ba1bf93589ab53e117f8e377583b4cc1464dc43b1b8d754e2a144eb", kill_on_drop: false }`
[INFO] [stdout] 8c4735a66ba1bf93589ab53e117f8e377583b4cc1464dc43b1b8d754e2a144eb