[INFO] fetching crate paper 0.3.0...
[INFO] checking paper-0.3.0 against master#b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18 for pr-79470
[INFO] extracting crate paper 0.3.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate paper 0.3.0 on toolchain b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6/source/.cargo/config
[INFO] started tweaking crates.io crate paper 0.3.0
[INFO] finished tweaking crates.io crate paper 0.3.0
[INFO] tweaked toml for crates.io crate paper 0.3.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e9496dff89e24315fbd34c0950d90a915bf86e8645e74d35b2895f10fe08734f
[INFO] running `Command { std: "docker" "start" "-a" "e9496dff89e24315fbd34c0950d90a915bf86e8645e74d35b2895f10fe08734f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e9496dff89e24315fbd34c0950d90a915bf86e8645e74d35b2895f10fe08734f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9496dff89e24315fbd34c0950d90a915bf86e8645e74d35b2895f10fe08734f", kill_on_drop: false }`
[INFO] [stdout] e9496dff89e24315fbd34c0950d90a915bf86e8645e74d35b2895f10fe08734f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+b7ebc6b0c1ba3c27ebb17c0b496ece778ef11e18" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f76f1f6b8f0301ef624f154d0aec92492e8e9bcc2c905d4aa826cdd2d547eeb
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6f76f1f6b8f0301ef624f154d0aec92492e8e9bcc2c905d4aa826cdd2d547eeb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking unicode-xid v0.1.0
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]     Checking semver-parser v0.9.0
[INFO] [stderr]     Checking lazysort v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling lazy_static v1.1.1
[INFO] [stderr]     Checking try_from v0.3.2
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]    Compiling double v0.2.4
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking toml v0.4.10
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]     Checking regex v1.4.2
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking syn v0.15.44
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking pancurses v0.16.1
[INFO] [stderr]     Checking num-bigint v0.1.44
[INFO] [stderr]     Checking num-complex v0.1.43
[INFO] [stderr]     Checking version-sync v0.6.0
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking rec v0.3.0
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking float-cmp v0.2.5
[INFO] [stderr]     Checking spectral v0.6.0
[INFO] [stderr]     Checking paper v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> tests/mock/mod.rs:13:29
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub apply: double::Mock<(Edit), ui::Outcome>,
[INFO] [stdout]    |                             ^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> tests/mock/mod.rs:44:28
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub read: double::Mock<(String), Outcome<String>>,
[INFO] [stdout]    |                            ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> tests/mock/mod.rs:13:29
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub apply: double::Mock<(Edit), ui::Outcome>,
[INFO] [stdout]    |                             ^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> tests/mock/mod.rs:44:28
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub read: double::Mock<(String), Outcome<String>>,
[INFO] [stdout]    |                            ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> tests/mock/mod.rs:13:29
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub apply: double::Mock<(Edit), ui::Outcome>,
[INFO] [stdout]    |                             ^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> tests/mock/mod.rs:44:28
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub read: double::Mock<(String), Outcome<String>>,
[INFO] [stdout]    |                            ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `display_sketch_edit`
[INFO] [stdout]   --> tests/mock/mod.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 | pub fn display_sketch_edit(sketch: String) -> Edit {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[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 [unoptimized + debuginfo] target(s) in 35.28s
[INFO] running `Command { std: "docker" "inspect" "6f76f1f6b8f0301ef624f154d0aec92492e8e9bcc2c905d4aa826cdd2d547eeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f76f1f6b8f0301ef624f154d0aec92492e8e9bcc2c905d4aa826cdd2d547eeb", kill_on_drop: false }`
[INFO] [stdout] 6f76f1f6b8f0301ef624f154d0aec92492e8e9bcc2c905d4aa826cdd2d547eeb