[INFO] fetching crate uncertain 0.3.1...
[INFO] checking uncertain-0.3.1 against 4d7f6614d0baa7689bd05eba340114667db4d5b7 for pr-133502-28
[INFO] extracting crate uncertain 0.3.1 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate uncertain 0.3.1
[INFO] finished tweaking crates.io crate uncertain 0.3.1
[INFO] tweaked toml for crates.io crate uncertain 0.3.1 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate uncertain 0.3.1 on toolchain 4d7f6614d0baa7689bd05eba340114667db4d5b7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d7f6614d0baa7689bd05eba340114667db4d5b7" "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" "+4d7f6614d0baa7689bd05eba340114667db4d5b7" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 19 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.7 (available: v0.10.2)
[INFO] [stderr]       Adding rand_distr v0.4.3 (available: v0.6.0)
[INFO] [stderr]       Adding rand_pcg v0.3.1 (available: v0.10.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d7f6614d0baa7689bd05eba340114667db4d5b7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 08ab40cbd1c174b53d79ab43013d844fd5c499092ca694b927b8ea0fe03a952e
[INFO] running `Command { std: "docker" "start" "08ab40cbd1c174b53d79ab43013d844fd5c499092ca694b927b8ea0fe03a952e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08ab40cbd1c174b53d79ab43013d844fd5c499092ca694b927b8ea0fe03a952e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "08ab40cbd1c174b53d79ab43013d844fd5c499092ca694b927b8ea0fe03a952e" "/opt/rustwide/cargo-home/bin/cargo" "+4d7f6614d0baa7689bd05eba340114667db4d5b7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08ab40cbd1c174b53d79ab43013d844fd5c499092ca694b927b8ea0fe03a952e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "08ab40cbd1c174b53d79ab43013d844fd5c499092ca694b927b8ea0fe03a952e" "/opt/rustwide/cargo-home/bin/cargo" "+4d7f6614d0baa7689bd05eba340114667db4d5b7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.189
[INFO] [stderr]     Checking cfg-if v1.0.4
[INFO] [stderr]    Compiling zerocopy v0.8.55
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]    Compiling autocfg v1.5.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking getrandom v0.2.17
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_pcg v0.3.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.7
[INFO] [stderr]     Checking rand_distr v0.4.3
[INFO] [stderr]     Checking uncertain v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> tests/basic_expect.rs:84:13
[INFO] [stdout]    |
[INFO] [stdout] 84 |     assert!((mu.unwrap() - 8.0).abs() < 0.1);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `uncertain` (test "basic_expect") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "08ab40cbd1c174b53d79ab43013d844fd5c499092ca694b927b8ea0fe03a952e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08ab40cbd1c174b53d79ab43013d844fd5c499092ca694b927b8ea0fe03a952e", kill_on_drop: false }`
[INFO] [stdout] 08ab40cbd1c174b53d79ab43013d844fd5c499092ca694b927b8ea0fe03a952e