[INFO] fetching crate fbleau 0.3.2...
[INFO] checking fbleau-0.3.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate fbleau 0.3.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate fbleau 0.3.2 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate fbleau 0.3.2
[INFO] finished tweaking crates.io crate fbleau 0.3.2
[INFO] tweaked toml for crates.io crate fbleau 0.3.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate fbleau 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde v1.0.123
[INFO] [stderr]   Downloaded serde_derive v1.0.123
[INFO] [stderr]   Downloaded instant v0.1.9
[INFO] [stderr]   Downloaded bencher v0.1.5
[INFO] [stderr]   Downloaded docopt v1.1.0
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[INFO] [stderr]   Downloaded libc v0.2.86
[INFO] [stderr]   Downloaded regex-syntax v0.6.22
[INFO] [stderr]   Downloaded csv v1.1.5
[INFO] [stderr]   Downloaded rustlearn v0.5.0
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[INFO] [stderr]   Downloaded ndarray v0.14.0
[INFO] [stderr]   Downloaded pyo3 v0.13.2
[INFO] [stderr]   Downloaded itertools v0.10.0
[INFO] [stderr]   Downloaded numpy v0.13.0
[INFO] [stderr]   Downloaded parking_lot_core v0.8.3
[INFO] [stderr]   Downloaded syn v1.0.60
[INFO] [stderr]   Downloaded byteorder v1.4.2
[INFO] [stderr]   Downloaded once_cell v1.6.0
[INFO] [stderr]   Downloaded float-cmp v0.8.0
[INFO] [stderr]   Downloaded ordered-float v2.1.1
[INFO] [stderr]   Downloaded indoc-impl v0.3.6
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[INFO] [stderr]   Downloaded lock_api v0.4.2
[INFO] [stderr]   Downloaded redox_syscall v0.2.5
[INFO] [stderr]   Downloaded parking_lot v0.11.1
[INFO] [stderr]   Downloaded paste-impl v0.1.18
[INFO] [stderr]   Downloaded paste v0.1.18
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.13.2
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[INFO] [stderr]   Downloaded pyo3-macros v0.13.2
[INFO] [stderr]   Downloaded crossbeam v0.2.12
[INFO] [stderr]   Downloaded gcc v0.3.55
[INFO] [stderr]   Downloaded proc-macro2 v1.0.24
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ece9d0d09c7152ccf15855028a75275cdf260da07474399c7ac47e49892af10e
[INFO] running `Command { std: "docker" "start" "-a" "ece9d0d09c7152ccf15855028a75275cdf260da07474399c7ac47e49892af10e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ece9d0d09c7152ccf15855028a75275cdf260da07474399c7ac47e49892af10e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ece9d0d09c7152ccf15855028a75275cdf260da07474399c7ac47e49892af10e", kill_on_drop: false }`
[INFO] [stdout] ece9d0d09c7152ccf15855028a75275cdf260da07474399c7ac47e49892af10e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a6317075285a07d2282d250193d050f23732b0f27f802dd93ec5d7a1c029e45e
[INFO] running `Command { std: "docker" "start" "-a" "a6317075285a07d2282d250193d050f23732b0f27f802dd93ec5d7a1c029e45e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling serde v1.0.123
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]     Checking once_cell v1.6.0
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling ndarray v0.14.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking matrixmultiply v0.2.4
[INFO] [stderr]     Checking aho-corasick v0.7.15
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking strsim v0.9.3
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking crossbeam v0.2.12
[INFO] [stderr]     Checking bencher v0.1.5
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking ordered-float v2.1.1
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]    Compiling rustlearn v0.5.0
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking regex v1.4.3
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]     Checking csv v1.1.5
[INFO] [stderr]     Checking fbleau v0.3.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]   --> src/estimates/knn.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | use std;
[INFO] [stdout]    |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]   --> src/estimates/knn.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | use std;
[INFO] [stdout]    |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/utils.rs:37:28
[INFO] [stdout]    |
[INFO] [stdout] 37 |                       panic!(format!("Could not parse file {}. Error at line: {:?}",
[INFO] [stdout]    |  ____________________________^
[INFO] [stdout] 38 | |                                    fname, record))));
[INFO] [stdout]    | |_________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the `panic!()` macro supports formatting, so there's no need for the `format!()` macro here
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 37 ~                     panic!("Could not parse file {}. Error at line: {:?}",
[INFO] [stdout] 38 ~                                    fname, record)));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `KNNEstimator` is imported redundantly
[INFO] [stdout]   --> benches/knn.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | use fbleau::estimates::*;
[INFO] [stdout]    |     -------------------- the item `KNNEstimator` is already imported here
[INFO] [stdout] 10 | use fbleau::estimates::knn::KNNEstimator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/utils.rs:37:28
[INFO] [stdout]    |
[INFO] [stdout] 37 |                       panic!(format!("Could not parse file {}. Error at line: {:?}",
[INFO] [stdout]    |  ____________________________^
[INFO] [stdout] 38 | |                                    fname, record))));
[INFO] [stdout]    | |_________________________________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this usage of `panic!()` is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]    = note: the `panic!()` macro supports formatting, so there's no need for the `format!()` macro here
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 37 ~                     panic!("Could not parse file {}. Error at line: {:?}",
[INFO] [stdout] 38 ~                                    fname, record)));
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.28s
[INFO] running `Command { std: "docker" "inspect" "a6317075285a07d2282d250193d050f23732b0f27f802dd93ec5d7a1c029e45e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6317075285a07d2282d250193d050f23732b0f27f802dd93ec5d7a1c029e45e", kill_on_drop: false }`
[INFO] [stdout] a6317075285a07d2282d250193d050f23732b0f27f802dd93ec5d7a1c029e45e