[INFO] fetching crate plotlib 0.5.1...
[INFO] checking plotlib-0.5.1 against try#894d32a5432c6a6461bb2aac7c3d5f2e87dce83f for pr-77015
[INFO] extracting crate plotlib 0.5.1 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate plotlib 0.5.1 on toolchain 894d32a5432c6a6461bb2aac7c3d5f2e87dce83f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate plotlib 0.5.1
[INFO] finished tweaking crates.io crate plotlib 0.5.1
[INFO] tweaked toml for crates.io crate plotlib 0.5.1 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate plotlib 0.5.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded svg v0.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2fe5a81f51680f868bc14ce073cc4e55186c039f5706b2610e54cc2e491e1a17
[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" "2fe5a81f51680f868bc14ce073cc4e55186c039f5706b2610e54cc2e491e1a17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fe5a81f51680f868bc14ce073cc4e55186c039f5706b2610e54cc2e491e1a17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fe5a81f51680f868bc14ce073cc4e55186c039f5706b2610e54cc2e491e1a17", kill_on_drop: false }`
[INFO] [stdout] 2fe5a81f51680f868bc14ce073cc4e55186c039f5706b2610e54cc2e491e1a17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+894d32a5432c6a6461bb2aac7c3d5f2e87dce83f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 460a488ed1f7f1b869a07996c7a4531bb8b4c8ebc594d4ef5d87a3a8d7695e81
[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" "460a488ed1f7f1b869a07996c7a4531bb8b4c8ebc594d4ef5d87a3a8d7695e81", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking svg v0.7.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.34
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking backtrace v0.3.45
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]     Checking failure v0.1.7
[INFO] [stderr]     Checking plotlib v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `line_style`
[INFO] [stdout]    --> src/repr/plot.rs:182:38
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let face_lines = if let Some(line_style) = &self.line_style {
[INFO] [stdout]     |                                      ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_style`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `line_style`
[INFO] [stdout]    --> src/repr/plot.rs:182:38
[INFO] [stdout]     |
[INFO] [stdout] 182 |         let face_lines = if let Some(line_style) = &self.line_style {
[INFO] [stdout]     |                                      ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_line_style`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.44s
[INFO] running `Command { std: "docker" "inspect" "460a488ed1f7f1b869a07996c7a4531bb8b4c8ebc594d4ef5d87a3a8d7695e81", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "460a488ed1f7f1b869a07996c7a4531bb8b4c8ebc594d4ef5d87a3a8d7695e81", kill_on_drop: false }`
[INFO] [stdout] 460a488ed1f7f1b869a07996c7a4531bb8b4c8ebc594d4ef5d87a3a8d7695e81