[INFO] fetching crate nanostat 0.2.0...
[INFO] checking nanostat-0.2.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate nanostat 0.2.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate nanostat 0.2.0 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 nanostat 0.2.0
[INFO] finished tweaking crates.io crate nanostat 0.2.0
[INFO] tweaked toml for crates.io crate nanostat 0.2.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate crates.io crate nanostat 0.2.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded typenum v1.14.0
[INFO] [stderr]   Downloaded approx v0.5.0
[INFO] [stderr]   Downloaded svg v0.7.2
[INFO] [stderr]   Downloaded num-complex v0.4.0
[INFO] [stderr]   Downloaded criterion-plot v0.4.4
[INFO] [stderr]   Downloaded plotters-backend v0.3.2
[INFO] [stderr]   Downloaded clap_derive v3.0.0
[INFO] [stderr]   Downloaded matrixmultiply v0.3.2
[INFO] [stderr]   Downloaded clap v3.0.0
[INFO] [stderr]   Downloaded object v0.27.1
[INFO] [stderr]   Downloaded libc v0.2.111
[INFO] [stderr]   Downloaded nalgebra v0.27.1
[INFO] [stderr]   Downloaded criterion v0.3.5
[INFO] [stderr]   Downloaded backtrace v0.3.63
[INFO] [stderr]   Downloaded rand_distr v0.4.2
[INFO] [stderr]   Downloaded libm v0.2.1
[INFO] [stderr]   Downloaded statrs v0.15.0
[INFO] [stderr]   Downloaded plotlib v0.5.1
[INFO] [stderr]   Downloaded simba v0.5.1
[INFO] [stderr]   Downloaded plotters-svg v0.3.1
[INFO] [stderr]   Downloaded plotters v0.3.1
[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] f77de1f4b3420352880f19d38bfba24ad6dfd62d287cbadac886bf54e644f0dd
[INFO] running `Command { std: "docker" "start" "-a" "f77de1f4b3420352880f19d38bfba24ad6dfd62d287cbadac886bf54e644f0dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f77de1f4b3420352880f19d38bfba24ad6dfd62d287cbadac886bf54e644f0dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f77de1f4b3420352880f19d38bfba24ad6dfd62d287cbadac886bf54e644f0dd", kill_on_drop: false }`
[INFO] [stdout] f77de1f4b3420352880f19d38bfba24ad6dfd62d287cbadac886bf54e644f0dd
[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] 892e6fa813e755da26dcbf68356d43170f1d9343b9bca0cbed29601c000841cc
[INFO] running `Command { std: "docker" "start" "-a" "892e6fa813e755da26dcbf68356d43170f1d9343b9bca0cbed29601c000841cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.111
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling serde v1.0.131
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]     Checking matrixmultiply v0.3.2
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking approx v0.5.0
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking rand_distr v0.4.2
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking simba v0.5.1
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking rayon v1.5.1
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling nalgebra-macros v0.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.131
[INFO] [stderr]     Checking nalgebra v0.27.1
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stderr]     Checking statrs v0.15.0
[INFO] [stderr]     Checking nanostat v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::iter::FromIterator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `FromIterator` is already defined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `FromIterator` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::iter::FromIterator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `FromIterator` is already defined here
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 45.79s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.5, nalgebra v0.27.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "892e6fa813e755da26dcbf68356d43170f1d9343b9bca0cbed29601c000841cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "892e6fa813e755da26dcbf68356d43170f1d9343b9bca0cbed29601c000841cc", kill_on_drop: false }`
[INFO] [stdout] 892e6fa813e755da26dcbf68356d43170f1d9343b9bca0cbed29601c000841cc