[INFO] fetching crate blendr 1.3.1...
[INFO] checking blendr-1.3.1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate blendr 1.3.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate blendr 1.3.1 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 blendr 1.3.1
[INFO] finished tweaking crates.io crate blendr 1.3.1
[INFO] tweaked toml for crates.io crate blendr 1.3.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate blendr 1.3.1 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
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 562000bd0079df78abedc480da3d9158903b240cc4a7eae62b8076bf891452dd
[INFO] running `Command { std: "docker" "start" "-a" "562000bd0079df78abedc480da3d9158903b240cc4a7eae62b8076bf891452dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "562000bd0079df78abedc480da3d9158903b240cc4a7eae62b8076bf891452dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "562000bd0079df78abedc480da3d9158903b240cc4a7eae62b8076bf891452dd", kill_on_drop: false }`
[INFO] [stdout] 562000bd0079df78abedc480da3d9158903b240cc4a7eae62b8076bf891452dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] b3b9e864c52ccc4a4785ce7aa68469480f7858c8be4e925e8f8b9c8650121f57
[INFO] running `Command { std: "docker" "start" "-a" "b3b9e864c52ccc4a4785ce7aa68469480f7858c8be4e925e8f8b9c8650121f57", kill_on_drop: false }`
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[INFO] [stderr]    Compiling blendr v1.3.1 (/opt/rustwide/workdir)
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[INFO] [stderr]     Checking futures-executor v0.3.29
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[INFO] [stdout] warning: the item `Iterator` is imported redundantly
[INFO] [stdout]  --> src/bluetooth.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::iter::Iterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[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/bluetooth.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::iter::Iterator;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Iterator` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `apply_sort` is never used
[INFO] [stdout]   --> src/cli_args.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 91 | impl GeneralSort {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 92 |     pub fn apply_sort<T: GeneralSortable>(&self, a: &T, b: &T) -> std::cmp::Ordering {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `apply_sort` is never used
[INFO] [stdout]   --> src/cli_args.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 91 | impl GeneralSort {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] 92 |     pub fn apply_sort<T: GeneralSortable>(&self, a: &T, b: &T) -> std::cmp::Ordering {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 45.63s
[INFO] running `Command { std: "docker" "inspect" "b3b9e864c52ccc4a4785ce7aa68469480f7858c8be4e925e8f8b9c8650121f57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3b9e864c52ccc4a4785ce7aa68469480f7858c8be4e925e8f8b9c8650121f57", kill_on_drop: false }`
[INFO] [stdout] b3b9e864c52ccc4a4785ce7aa68469480f7858c8be4e925e8f8b9c8650121f57