[INFO] fetching crate plotlib 0.5.1...
[INFO] building plotlib-0.5.1 against master#d5c88c22807925c189328ef9d923c5d2b11a95b8 for pr-87066-3
[INFO] extracting crate plotlib 0.5.1 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate plotlib 0.5.1 on toolchain d5c88c22807925c189328ef9d923c5d2b11a95b8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-21/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" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92946c8d55d6a06a61f1cd96ba5075d29fb07f3be0576baae82b513bece29e65
[INFO] running `Command { std: "docker" "start" "-a" "92946c8d55d6a06a61f1cd96ba5075d29fb07f3be0576baae82b513bece29e65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92946c8d55d6a06a61f1cd96ba5075d29fb07f3be0576baae82b513bece29e65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92946c8d55d6a06a61f1cd96ba5075d29fb07f3be0576baae82b513bece29e65", kill_on_drop: false }`
[INFO] [stdout] 92946c8d55d6a06a61f1cd96ba5075d29fb07f3be0576baae82b513bece29e65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9cfb19f849641a93380704fc34e590f8ce9e1b93bf9883b939969168992fff89
[INFO] running `Command { std: "docker" "start" "-a" "9cfb19f849641a93380704fc34e590f8ce9e1b93bf9883b939969168992fff89", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling libc v0.2.67
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling svg v0.7.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.34
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling backtrace v0.3.45
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling failure v0.1.7
[INFO] [stderr]    Compiling 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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.33s
[INFO] running `Command { std: "docker" "inspect" "9cfb19f849641a93380704fc34e590f8ce9e1b93bf9883b939969168992fff89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9cfb19f849641a93380704fc34e590f8ce9e1b93bf9883b939969168992fff89", kill_on_drop: false }`
[INFO] [stdout] 9cfb19f849641a93380704fc34e590f8ce9e1b93bf9883b939969168992fff89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6babf02588ef3e453fc3e9534fe291159e062c3cd08b0e1d13d8dfe9a17f59b3
[INFO] running `Command { std: "docker" "start" "-a" "6babf02588ef3e453fc3e9534fe291159e062c3cd08b0e1d13d8dfe9a17f59b3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling 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 test [unoptimized + debuginfo] target(s) in 3.27s
[INFO] running `Command { std: "docker" "inspect" "6babf02588ef3e453fc3e9534fe291159e062c3cd08b0e1d13d8dfe9a17f59b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6babf02588ef3e453fc3e9534fe291159e062c3cd08b0e1d13d8dfe9a17f59b3", kill_on_drop: false }`
[INFO] [stdout] 6babf02588ef3e453fc3e9534fe291159e062c3cd08b0e1d13d8dfe9a17f59b3