[INFO] fetching crate carbon-lib 0.3.1...
[INFO] checking carbon-lib-0.3.1 against master#339e19697a39a78f4d669c217b7d21109215de41 for pr-81213
[INFO] extracting crate carbon-lib 0.3.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate carbon-lib 0.3.1 on toolchain 339e19697a39a78f4d669c217b7d21109215de41
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate carbon-lib 0.3.1
[INFO] finished tweaking crates.io crate carbon-lib 0.3.1
[INFO] tweaked toml for crates.io crate carbon-lib 0.3.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0882c8fad7ad9056dca0e7334a004dfc4c309e51dca741de9ce3d6f8494dbaf1
[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" "0882c8fad7ad9056dca0e7334a004dfc4c309e51dca741de9ce3d6f8494dbaf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0882c8fad7ad9056dca0e7334a004dfc4c309e51dca741de9ce3d6f8494dbaf1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0882c8fad7ad9056dca0e7334a004dfc4c309e51dca741de9ce3d6f8494dbaf1", kill_on_drop: false }`
[INFO] [stdout] 0882c8fad7ad9056dca0e7334a004dfc4c309e51dca741de9ce3d6f8494dbaf1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3e4c6b9c19ab371a5719766a5e8b2bbea8910f8e66cea16fe59b7b9f6e57d16
[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" "b3e4c6b9c19ab371a5719766a5e8b2bbea8910f8e66cea16fe59b7b9f6e57d16", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling serde v1.0.120
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling cc v1.0.66
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.59
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]     Checking safemem v0.3.3
[INFO] [stderr]    Compiling serde_derive v1.0.120
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking line-wrap v0.1.1
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling hashbrown v0.8.2
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling indexmap v1.5.2
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling onig_sys v69.6.0
[INFO] [stderr]     Checking flate2 v1.0.19
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking plist v1.0.1
[INFO] [stderr]     Checking bincode v1.3.1
[INFO] [stderr]     Checking onig v6.1.1
[INFO] [stderr]     Checking syntect v4.5.0
[INFO] [stderr]     Checking carbon-dump v1.2.2
[INFO] [stderr]     Checking carbon-lib v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/highlight.rs:54:22
[INFO] [stdout]    |
[INFO] [stdout] 54 |                 Some(s) => {
[INFO] [stdout]    |                      ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `html_fancy_box`
[INFO] [stdout]   --> src/utils/html.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn html_fancy_box(s: &str, title: &Option<String>) -> String {
[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: unused variable: `s`
[INFO] [stdout]   --> src/highlight.rs:54:22
[INFO] [stdout]    |
[INFO] [stdout] 54 |                 Some(s) => {
[INFO] [stdout]    |                      ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `html_fancy_box`
[INFO] [stdout]   --> src/utils/html.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn html_fancy_box(s: &str, title: &Option<String>) -> String {
[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 [unoptimized + debuginfo] target(s) in 46.92s
[INFO] running `Command { std: "docker" "inspect" "b3e4c6b9c19ab371a5719766a5e8b2bbea8910f8e66cea16fe59b7b9f6e57d16", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3e4c6b9c19ab371a5719766a5e8b2bbea8910f8e66cea16fe59b7b9f6e57d16", kill_on_drop: false }`
[INFO] [stdout] b3e4c6b9c19ab371a5719766a5e8b2bbea8910f8e66cea16fe59b7b9f6e57d16