[INFO] fetching crate make_ultra 0.2.4...
[INFO] checking make_ultra-0.2.4 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate make_ultra 0.2.4 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate make_ultra 0.2.4 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 make_ultra 0.2.4
[INFO] finished tweaking crates.io crate make_ultra 0.2.4
[INFO] tweaked toml for crates.io crate make_ultra 0.2.4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate make_ultra 0.2.4 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_regex v0.3.1
[INFO] [stderr]   Downloaded fixedbitset v0.1.9
[INFO] [stderr]   Downloaded ordermap v0.3.5
[INFO] [stderr]   Downloaded petgraph v0.4.13
[INFO] [stderr]   Downloaded snap v0.2.5
[INFO] [stderr]   Downloaded cached v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 61ecc9b6acb2508620029eb273edc1bc1862849c2b6dfcd4a9d82600d8c74137
[INFO] running `Command { std: "docker" "start" "-a" "61ecc9b6acb2508620029eb273edc1bc1862849c2b6dfcd4a9d82600d8c74137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "61ecc9b6acb2508620029eb273edc1bc1862849c2b6dfcd4a9d82600d8c74137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61ecc9b6acb2508620029eb273edc1bc1862849c2b6dfcd4a9d82600d8c74137", kill_on_drop: false }`
[INFO] [stdout] 61ecc9b6acb2508620029eb273edc1bc1862849c2b6dfcd4a9d82600d8c74137
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] a2c37855f21e89abd95e3f6f7aa265067cb3db0cc28b9fb0aae5e4a25baa34ef
[INFO] running `Command { std: "docker" "start" "-a" "a2c37855f21e89abd95e3f6f7aa265067cb3db0cc28b9fb0aae5e4a25baa34ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling crossbeam-utils v0.8.8
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.8
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]     Checking crossbeam-channel v0.5.4
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking ordermap v0.3.5
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking fixedbitset v0.1.9
[INFO] [stderr]     Checking snap v0.2.5
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking petgraph v0.4.13
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking crossbeam-channel v0.4.4
[INFO] [stderr]     Checking crossbeam-queue v0.2.3
[INFO] [stderr]     Checking crossbeam-deque v0.7.4
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking crossbeam v0.7.3
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking regex v1.5.5
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking once_cell v0.1.8
[INFO] [stderr]     Checking globset v0.4.8
[INFO] [stderr]     Checking cached v0.8.1
[INFO] [stderr]     Checking ignore v0.4.18
[INFO] [stderr]     Checking hashbrown v0.1.8
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking serde_regex v0.3.1
[INFO] [stderr]     Checking make_ultra v0.2.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `StableDiGraph` is imported redundantly
[INFO] [stdout]   --> src/main.rs:19:28
[INFO] [stdout]    |
[INFO] [stdout] 19 | use petgraph::{prelude::*, stable_graph::StableDiGraph};
[INFO] [stdout]    |                ----------  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the item `StableDiGraph` is already imported here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `StableDiGraph` is imported redundantly
[INFO] [stdout]   --> src/main.rs:19:28
[INFO] [stdout]    |
[INFO] [stdout] 19 | use petgraph::{prelude::*, stable_graph::StableDiGraph};
[INFO] [stdout]    |                ----------  ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the item `StableDiGraph` is already imported 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 6.40s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: snap v0.2.5
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 6`
[INFO] running `Command { std: "docker" "inspect" "a2c37855f21e89abd95e3f6f7aa265067cb3db0cc28b9fb0aae5e4a25baa34ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2c37855f21e89abd95e3f6f7aa265067cb3db0cc28b9fb0aae5e4a25baa34ef", kill_on_drop: false }`
[INFO] [stdout] a2c37855f21e89abd95e3f6f7aa265067cb3db0cc28b9fb0aae5e4a25baa34ef