[INFO] cloning repository https://github.com/compilin/latgraph
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/compilin/latgraph" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcompilin%2Flatgraph", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcompilin%2Flatgraph'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 21bd4047629c63947803970a3874ba3667d399fb
[INFO] checking compilin/latgraph against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcompilin%2Flatgraph" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/compilin/latgraph 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 git repo https://github.com/compilin/latgraph
[INFO] finished tweaking git repo https://github.com/compilin/latgraph
[INFO] tweaked toml for git repo https://github.com/compilin/latgraph written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/compilin/latgraph 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 thread-priority v0.2.4
[INFO] [stderr]   Downloaded conrod_winit v0.71.0
[INFO] [stderr]   Downloaded conrod_derive v0.71.0
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[INFO] [stderr]   Downloaded wayland-commons v0.23.6
[INFO] [stderr]   Downloaded copypasta v0.6.3
[INFO] [stderr]   Downloaded wayland-protocols v0.23.6
[INFO] [stderr]   Downloaded smithay-client-toolkit v0.6.6
[INFO] [stderr]   Downloaded wayland-client v0.23.6
[INFO] [stderr]   Downloaded conrod_core v0.71.0
[INFO] [stderr]   Downloaded glium v0.28.0
[INFO] [stderr]   Downloaded glutin v0.25.1
[INFO] [stderr]   Downloaded conrod_glium v0.71.0
[INFO] [stderr]   Downloaded minimal-lexical v0.1.3
[INFO] [stderr]   Downloaded nom v7.0.0
[INFO] [stderr]   Downloaded smithay-clipboard v0.4.0
[INFO] [stderr]   Downloaded wayland-scanner v0.23.6
[INFO] [stderr]   Downloaded wayland-sys v0.23.6
[INFO] [stderr]   Downloaded daggy v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] cc17189fed3d0ebedabc10de170ccaf3395d1c4a7f3d8f4b5d0dfaf7f50de601
[INFO] running `Command { std: "docker" "start" "-a" "cc17189fed3d0ebedabc10de170ccaf3395d1c4a7f3d8f4b5d0dfaf7f50de601", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc17189fed3d0ebedabc10de170ccaf3395d1c4a7f3d8f4b5d0dfaf7f50de601", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc17189fed3d0ebedabc10de170ccaf3395d1c4a7f3d8f4b5d0dfaf7f50de601", kill_on_drop: false }`
[INFO] [stdout] cc17189fed3d0ebedabc10de170ccaf3395d1c4a7f3d8f4b5d0dfaf7f50de601
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] d2f74392dca40715666d4f8212b096eb40bf0e5c6efcf97f27dbc67fae39f6b1
[INFO] running `Command { std: "docker" "start" "-a" "d2f74392dca40715666d4f8212b096eb40bf0e5c6efcf97f27dbc67fae39f6b1", kill_on_drop: false }`
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[INFO] [stderr]     Checking downcast-rs v1.2.0
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[INFO] [stderr]     Checking adler32 v1.2.0
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[INFO] [stderr]    Compiling backtrace v0.3.61
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[INFO] [stderr]    Compiling wayland-protocols v0.23.6
[INFO] [stderr]     Checking petgraph v0.4.13
[INFO] [stderr]     Checking piston-viewport v1.0.0
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[INFO] [stderr]    Compiling glium v0.28.0
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[INFO] [stderr]    Compiling num-rational v0.3.2
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[INFO] [stderr]     Checking image v0.23.14
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[INFO] [stderr]    Compiling conrod_derive v0.71.0
[INFO] [stderr]     Checking pistoncore-input v1.0.0
[INFO] [stderr]     Checking x11-clipboard v0.5.2
[INFO] [stderr]     Checking smithay-client-toolkit v0.12.3
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[INFO] [stderr]     Checking smithay-clipboard v0.4.0
[INFO] [stderr]     Checking copypasta v0.6.3
[INFO] [stderr]     Checking conrod_core v0.71.0
[INFO] [stderr]     Checking glutin v0.25.1
[INFO] [stderr]     Checking conrod_glium v0.71.0
[INFO] [stderr]     Checking latgraph v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `glium` is imported redundantly
[INFO] [stdout]   --> src/app.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     self,
[INFO] [stdout]    |     ^^^^ the item `glium` 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 `Iterator` is imported redundantly
[INFO] [stdout]  --> src/ringbuf.rs:3:39
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{cmp::min, convert::TryFrom, iter::Iterator, time::Instant};
[INFO] [stdout]   |                                       ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `glium` is imported redundantly
[INFO] [stdout]   --> src/app.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     self,
[INFO] [stdout]    |     ^^^^ the item `glium` 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 `Iterator` is imported redundantly
[INFO] [stdout]  --> src/ringbuf.rs:3:39
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{cmp::min, convert::TryFrom, iter::Iterator, time::Instant};
[INFO] [stdout]   |                                       ^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:134:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings 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 54.66s
[INFO] running `Command { std: "docker" "inspect" "d2f74392dca40715666d4f8212b096eb40bf0e5c6efcf97f27dbc67fae39f6b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2f74392dca40715666d4f8212b096eb40bf0e5c6efcf97f27dbc67fae39f6b1", kill_on_drop: false }`
[INFO] [stdout] d2f74392dca40715666d4f8212b096eb40bf0e5c6efcf97f27dbc67fae39f6b1