[INFO] fetching crate ppom 0.7.0...
[INFO] checking ppom-0.7.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate ppom 0.7.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate ppom 0.7.0 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 ppom 0.7.0
[INFO] finished tweaking crates.io crate ppom 0.7.0
[INFO] tweaked toml for crates.io crate ppom 0.7.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate ppom 0.7.0 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]  Downloading crates ...
[INFO] [stderr]   Downloaded arbitrary v0.4.7
[INFO] [stderr]   Downloaded structopt v0.3.23
[INFO] [stderr]   Downloaded derive_arbitrary v0.4.7
[INFO] [stderr]   Downloaded syn v1.0.76
[INFO] [stderr]   Downloaded structopt-derive v0.4.16
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] da18c436b98a3dff7d83030fda03ec54e4d79c4a0e5bdc36affc6e0c0c0721f4
[INFO] running `Command { std: "docker" "start" "-a" "da18c436b98a3dff7d83030fda03ec54e4d79c4a0e5bdc36affc6e0c0c0721f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da18c436b98a3dff7d83030fda03ec54e4d79c4a0e5bdc36affc6e0c0c0721f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da18c436b98a3dff7d83030fda03ec54e4d79c4a0e5bdc36affc6e0c0c0721f4", kill_on_drop: false }`
[INFO] [stdout] da18c436b98a3dff7d83030fda03ec54e4d79c4a0e5bdc36affc6e0c0c0721f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ab2ccbd1229fe75c9ffc17dc602c064c2dab24170a380f334d43b2aa26a23ffb
[INFO] running `Command { std: "docker" "start" "-a" "ab2ccbd1229fe75c9ffc17dc602c064c2dab24170a380f334d43b2aa26a23ffb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking ppom v0.7.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/./ppom.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     cmp::{Ord, Ordering},
[INFO] [stdout]   |           ^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/omap.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     cmp::{Ord, Ordering},
[INFO] [stdout]   |           ^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling derive_arbitrary v0.4.7
[INFO] [stderr]     Checking arbitrary v0.4.7
[INFO] [stdout] warning: the item `Ord` is imported redundantly
[INFO] [stdout]  --> src/./ppom.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 |     cmp::{Ord, Ordering},
[INFO] [stdout]   |           ^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Ord` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `arbitrary` is imported redundantly
[INFO] [stdout]  --> src/arc_test.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use arbitrary::{self, unstructured::Unstructured, Arbitrary};
[INFO] [stdout]   |                 ^^^^ the item `arbitrary` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Bound` is imported redundantly
[INFO] [stdout]   --> src/mdb_test.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 8  |     ops::Bound,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 12 | use super::*;
[INFO] [stdout]    |     -------- the item `Bound` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `arbitrary` is imported redundantly
[INFO] [stdout]  --> src/omap_test.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use arbitrary::{self, unstructured::Unstructured, Arbitrary};
[INFO] [stdout]   |                 ^^^^ the item `arbitrary` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Rng` is imported redundantly
[INFO] [stdout]  --> src/omap_test.rs:2:45
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand::{prelude::random, rngs::SmallRng, Rng, SeedableRng};
[INFO] [stdout]   |                                             ^^^
[INFO] [stdout] 3 |
[INFO] [stdout] 4 | use super::*;
[INFO] [stdout]   |     -------- the item `Rng` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `arbitrary` is imported redundantly
[INFO] [stdout]  --> src/rc_test.rs:1:17
[INFO] [stdout]   |
[INFO] [stdout] 1 | use arbitrary::{self, unstructured::Unstructured, Arbitrary};
[INFO] [stdout]   |                 ^^^^ the item `arbitrary` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.47s
[INFO] running `Command { std: "docker" "inspect" "ab2ccbd1229fe75c9ffc17dc602c064c2dab24170a380f334d43b2aa26a23ffb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab2ccbd1229fe75c9ffc17dc602c064c2dab24170a380f334d43b2aa26a23ffb", kill_on_drop: false }`
[INFO] [stdout] ab2ccbd1229fe75c9ffc17dc602c064c2dab24170a380f334d43b2aa26a23ffb