[INFO] cloning repository https://github.com/ymgyt/mathground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ymgyt/mathground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fymgyt%2Fmathground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fymgyt%2Fmathground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d85cc5cf4b15a4b365b2d0a7e2bc51a5d1b3d8ad
[INFO] checking ymgyt/mathground against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fymgyt%2Fmathground" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ymgyt/mathground on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ymgyt/mathground
[INFO] finished tweaking git repo https://github.com/ymgyt/mathground
[INFO] tweaked toml for git repo https://github.com/ymgyt/mathground written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/ymgyt/mathground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 28c232ee7cc29b7cc21d7d107d891e82ce25c15d81ed12174d1ecd91e90c9b44
[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" "28c232ee7cc29b7cc21d7d107d891e82ce25c15d81ed12174d1ecd91e90c9b44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "28c232ee7cc29b7cc21d7d107d891e82ce25c15d81ed12174d1ecd91e90c9b44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28c232ee7cc29b7cc21d7d107d891e82ce25c15d81ed12174d1ecd91e90c9b44", kill_on_drop: false }`
[INFO] [stdout] 28c232ee7cc29b7cc21d7d107d891e82ce25c15d81ed12174d1ecd91e90c9b44
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00ee2be486dec4220dd8872fd924f28d67ed4a9988cdc06751c4382e45a19646
[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" "00ee2be486dec4220dd8872fd924f28d67ed4a9988cdc06751c4382e45a19646", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]    Compiling anyhow v1.0.28
[INFO] [stderr]     Checking svg v0.7.2
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]     Checking assert_approx_eq v1.1.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling backtrace-sys v0.1.36
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking statrs v0.12.0
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]     Checking failure v0.1.7
[INFO] [stderr]     Checking plotlib v0.5.1
[INFO] [stderr]     Checking mathground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/differential.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let mut v = plotlib::view::ContinuousView::new().add(f1).add(f2);
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PointMarker`
[INFO] [stdout]  --> examples/condensor.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use plotlib::style::{LineStyle, PointMarker};
[INFO] [stdout]   |                                 ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `PointMarker`
[INFO] [stdout]  --> examples/sin.rs:3:33
[INFO] [stdout]   |
[INFO] [stdout] 3 | use plotlib::style::{LineStyle, PointMarker};
[INFO] [stdout]   |                                 ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.96s
[INFO] running `Command { std: "docker" "inspect" "00ee2be486dec4220dd8872fd924f28d67ed4a9988cdc06751c4382e45a19646", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00ee2be486dec4220dd8872fd924f28d67ed4a9988cdc06751c4382e45a19646", kill_on_drop: false }`
[INFO] [stdout] 00ee2be486dec4220dd8872fd924f28d67ed4a9988cdc06751c4382e45a19646