[INFO] fetching crate oatbar 0.0.30...
[INFO] checking oatbar-0.0.30 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate oatbar 0.0.30 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate oatbar 0.0.30 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 oatbar 0.0.30
[INFO] finished tweaking crates.io crate oatbar 0.0.30
[INFO] tweaked toml for crates.io crate oatbar 0.0.30 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate oatbar 0.0.30 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 ...
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[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] a719f648dec2acbb3e72617f5d0420c23e258fd625898cfe9ac8191b82c0f516
[INFO] running `Command { std: "docker" "start" "-a" "a719f648dec2acbb3e72617f5d0420c23e258fd625898cfe9ac8191b82c0f516", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a719f648dec2acbb3e72617f5d0420c23e258fd625898cfe9ac8191b82c0f516", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a719f648dec2acbb3e72617f5d0420c23e258fd625898cfe9ac8191b82c0f516", kill_on_drop: false }`
[INFO] [stdout] a719f648dec2acbb3e72617f5d0420c23e258fd625898cfe9ac8191b82c0f516
[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] d66d9cb9adb8e2b8343bb6f34fcc34f0419ddfaa4b1e91e443facc7451ba8cb6
[INFO] running `Command { std: "docker" "start" "-a" "d66d9cb9adb8e2b8343bb6f34fcc34f0419ddfaa4b1e91e443facc7451ba8cb6", kill_on_drop: false }`
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[INFO] [stderr]     Checking oatbar v0.0.30 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]  --> src/parse.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::convert::{From, TryFrom};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `From` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/parse.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::convert::{From, TryFrom};
[INFO] [stdout]   |                          ^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `From` is imported redundantly
[INFO] [stdout]  --> src/parse.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::convert::{From, TryFrom};
[INFO] [stdout]   |                    ^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `From` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/parse.rs:7:26
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::convert::{From, TryFrom};
[INFO] [stdout]   |                          ^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]   --> src/drawing.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct Context {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub height: f64,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]   --> src/xrandr.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub struct Monitor {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 11 |     pub y: u16,
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Monitor` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `height` is never read
[INFO] [stdout]   --> src/drawing.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct Context {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 39 |     pub height: f64,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `y` is never read
[INFO] [stdout]   --> src/xrandr.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub struct Monitor {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 11 |     pub y: u16,
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Monitor` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 46.39s
[INFO] running `Command { std: "docker" "inspect" "d66d9cb9adb8e2b8343bb6f34fcc34f0419ddfaa4b1e91e443facc7451ba8cb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d66d9cb9adb8e2b8343bb6f34fcc34f0419ddfaa4b1e91e443facc7451ba8cb6", kill_on_drop: false }`
[INFO] [stdout] d66d9cb9adb8e2b8343bb6f34fcc34f0419ddfaa4b1e91e443facc7451ba8cb6