[INFO] cloning repository https://github.com/longfangsong/silly_browser
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/longfangsong/silly_browser" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flongfangsong%2Fsilly_browser", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flongfangsong%2Fsilly_browser'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f0f1fce8741603e2e0deada24d07a307d71b4318
[INFO] checking longfangsong/silly_browser against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flongfangsong%2Fsilly_browser" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] [stderr] Checking out files:  77% (7/9)   
Checking out files:  88% (8/9)   
Checking out files: 100% (9/9)   
Checking out files: 100% (9/9), done.
[INFO] validating manifest of git repo https://github.com/longfangsong/silly_browser on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/longfangsong/silly_browser
[INFO] finished tweaking git repo https://github.com/longfangsong/silly_browser
[INFO] tweaked toml for git repo https://github.com/longfangsong/silly_browser written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/longfangsong/silly_browser already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded piston-float v0.3.0
[INFO] [stderr]   Downloaded num-bigint v0.2.3
[INFO] [stderr]   Downloaded daggy v0.5.0
[INFO] [stderr]   Downloaded conrod_derive v0.67.0
[INFO] [stderr]   Downloaded num v0.2.0
[INFO] [stderr]   Downloaded conrod_glium v0.67.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.3
[INFO] [stderr]   Downloaded conrod_winit v0.67.0
[INFO] [stderr]   Downloaded gl_generator v0.13.1
[INFO] [stderr]   Downloaded conrod_core v0.67.0
[INFO] [stderr]   Downloaded glutin v0.20.1
[INFO] [stderr]   Downloaded backtrace v0.3.37
[INFO] [stderr]   Downloaded markup5ever v0.8.1
[INFO] [stderr]   Downloaded string_cache_codegen v0.4.4
[INFO] [stderr]   Downloaded memoffset v0.5.1
[INFO] [stderr]   Downloaded rustc-hash v1.0.1
[INFO] [stderr]   Downloaded gleam v0.6.19
[INFO] [stderr]   Downloaded html5ever v0.23.0
[INFO] [stderr]   Downloaded lexical-core v0.4.5
[INFO] [stderr]   Downloaded winit v0.19.3
[INFO] [stderr]   Downloaded glium v0.24.0
[INFO] [stderr]   Downloaded instant v0.1.1
[INFO] [stderr]   Downloaded piston-viewport v0.5.0
[INFO] [stderr]   Downloaded pistoncore-input v0.24.0
[INFO] [stderr]   Downloaded find_folder v0.3.0
[INFO] [stderr]   Downloaded crossbeam-epoch v0.7.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 603fa4849000c1a300feaec6eb5b0c8ac78eff56ad6dccea9e74942b3da19f7b
[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" "603fa4849000c1a300feaec6eb5b0c8ac78eff56ad6dccea9e74942b3da19f7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "603fa4849000c1a300feaec6eb5b0c8ac78eff56ad6dccea9e74942b3da19f7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "603fa4849000c1a300feaec6eb5b0c8ac78eff56ad6dccea9e74942b3da19f7b", kill_on_drop: false }`
[INFO] [stdout] 603fa4849000c1a300feaec6eb5b0c8ac78eff56ad6dccea9e74942b3da19f7b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8c3707a86ecf15b246e799797321849d16c4cc53adb58213d04fea5167bac02
[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" "f8c3707a86ecf15b246e799797321849d16c4cc53adb58213d04fea5167bac02", kill_on_drop: false }`
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]     Checking conrod_winit v0.67.0
[INFO] [stderr]     Checking x11-dl v2.18.4
[INFO] [stderr]     Checking ordered-float v1.0.2
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling lexical-core v0.4.5
[INFO] [stderr]     Checking num-complex v0.2.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking num-bigint v0.2.3
[INFO] [stderr]     Checking num-iter v0.1.39
[INFO] [stderr]     Checking backtrace v0.3.37
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling conrod_derive v0.67.0
[INFO] [stderr]     Checking wayland-commons v0.21.13
[INFO] [stderr]    Compiling glium v0.24.0
[INFO] [stderr]     Checking wayland-client v0.21.13
[INFO] [stderr]     Checking crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]     Checking num-rational v0.2.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking wayland-protocols v0.21.13
[INFO] [stderr]     Checking rusttype v0.8.0
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]     Checking rusttype v0.7.9
[INFO] [stderr]     Checking andrew v0.2.1
[INFO] [stderr]     Checking glutin_glx_sys v0.1.5
[INFO] [stderr]     Checking nom v5.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]     Checking smithay-client-toolkit v0.4.6
[INFO] [stderr]     Checking winit v0.19.3
[INFO] [stderr]     Checking glutin v0.20.1
[INFO] [stderr]    Compiling markup5ever v0.8.1
[INFO] [stderr]     Checking pistoncore-input v0.24.0
[INFO] [stderr]     Checking conrod_core v0.67.0
[INFO] [stderr]     Checking html5ever v0.23.0
[INFO] [stderr]     Checking conrod_glium v0.67.0
[INFO] [stderr]     Checking silly_browser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `conrod_core::text::Font`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use conrod_core::text::Font;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nom::character::complete::space1`
[INFO] [stdout]  --> src/parser.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use nom::character::complete::space1;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::borrow::BorrowMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `conrod_core::text::Font`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use conrod_core::text::Font;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `nom::character::complete::space1`
[INFO] [stdout]  --> src/parser.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use nom::character::complete::space1;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `count_tags`
[INFO] [stdout]    --> src/main.rs:271:4
[INFO] [stdout]     |
[INFO] [stdout] 271 | fn count_tags(node: &Handle) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `count_tags`
[INFO] [stdout]    --> src/main.rs:271:4
[INFO] [stdout]     |
[INFO] [stdout] 271 | fn count_tags(node: &Handle) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 23s
[INFO] running `Command { std: "docker" "inspect" "f8c3707a86ecf15b246e799797321849d16c4cc53adb58213d04fea5167bac02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8c3707a86ecf15b246e799797321849d16c4cc53adb58213d04fea5167bac02", kill_on_drop: false }`
[INFO] [stdout] f8c3707a86ecf15b246e799797321849d16c4cc53adb58213d04fea5167bac02