[INFO] fetching crate rustc-rayon-core 0.5.0...
[INFO] checking rustc-rayon-core-0.5.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate rustc-rayon-core 0.5.0 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate rustc-rayon-core 0.5.0 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 rustc-rayon-core 0.5.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rustc-rayon-core 0.5.0
[INFO] tweaked toml for crates.io crate rustc-rayon-core 0.5.0 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 1fff7603fbdf103f0cdb516eb8c805ab85cb8f593469028c811a785e7515013f
[INFO] running `Command { std: "docker" "start" "-a" "1fff7603fbdf103f0cdb516eb8c805ab85cb8f593469028c811a785e7515013f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1fff7603fbdf103f0cdb516eb8c805ab85cb8f593469028c811a785e7515013f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1fff7603fbdf103f0cdb516eb8c805ab85cb8f593469028c811a785e7515013f", kill_on_drop: false }`
[INFO] [stdout] 1fff7603fbdf103f0cdb516eb8c805ab85cb8f593469028c811a785e7515013f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 739c212b1aea5b2f61667ca89cd720b7f025abf30a6a6f9a54b02522b7d8c5d4
[INFO] running `Command { std: "docker" "start" "-a" "739c212b1aea5b2f61667ca89cd720b7f025abf30a6a6f9a54b02522b7d8c5d4", kill_on_drop: false }`
[INFO] [stderr]     Checking crossbeam-channel v0.5.12
[INFO] [stderr]     Checking rand_xorshift v0.3.0
[INFO] [stderr]     Checking rustc-rayon-core v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `crossbeam_channel` is imported redundantly
[INFO] [stdout]   --> src/log.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 | use crossbeam_channel::{self, Receiver, Sender};
[INFO] [stdout]    |                         ^^^^ the item `crossbeam_channel` 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 `crossbeam_channel` is imported redundantly
[INFO] [stdout]   --> src/log.rs:21:25
[INFO] [stdout]    |
[INFO] [stdout] 21 | use crossbeam_channel::{self, Receiver, Sender};
[INFO] [stdout]    |                         ^^^^ the item `crossbeam_channel` 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 `unwind` is imported redundantly
[INFO] [stdout]  --> src/join/test.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::join::*;
[INFO] [stdout]   |     -------------- the item `unwind` is already imported here
[INFO] [stdout] 4 | use crate::unwind;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.16s
[INFO] running `Command { std: "docker" "inspect" "739c212b1aea5b2f61667ca89cd720b7f025abf30a6a6f9a54b02522b7d8c5d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "739c212b1aea5b2f61667ca89cd720b7f025abf30a6a6f9a54b02522b7d8c5d4", kill_on_drop: false }`
[INFO] [stdout] 739c212b1aea5b2f61667ca89cd720b7f025abf30a6a6f9a54b02522b7d8c5d4