[INFO] cloning repository https://github.com/Jswizzy/mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jswizzy/mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJswizzy%2Fmandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJswizzy%2Fmandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bbad2f34a66e00bac558affc3b604240ccd50770
[INFO] checking Jswizzy/mandelbrot against try#f47dd4da3ae8c32c9e65d307bfe640b143e674df for pr-77526
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJswizzy%2Fmandelbrot" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Jswizzy/mandelbrot on toolchain f47dd4da3ae8c32c9e65d307bfe640b143e674df
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Jswizzy/mandelbrot
[INFO] finished tweaking git repo https://github.com/Jswizzy/mandelbrot
[INFO] tweaked toml for git repo https://github.com/Jswizzy/mandelbrot written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/Jswizzy/mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] db9e0f31ee3f2ac711b7ae5521db14f255b9aeedd5f2b0013c8bdf3b0fce203f
[INFO] running `Command { std: "docker" "start" "-a" "db9e0f31ee3f2ac711b7ae5521db14f255b9aeedd5f2b0013c8bdf3b0fce203f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db9e0f31ee3f2ac711b7ae5521db14f255b9aeedd5f2b0013c8bdf3b0fce203f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db9e0f31ee3f2ac711b7ae5521db14f255b9aeedd5f2b0013c8bdf3b0fce203f", kill_on_drop: false }`
[INFO] [stdout] db9e0f31ee3f2ac711b7ae5521db14f255b9aeedd5f2b0013c8bdf3b0fce203f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+f47dd4da3ae8c32c9e65d307bfe640b143e674df" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19e3c1e28683f8aeae639af62d094774426f35cc0cea923a768cd570d3d7afdb
[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" "19e3c1e28683f8aeae639af62d094774426f35cc0cea923a768cd570d3d7afdb", kill_on_drop: false }`
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking cfg-if v0.1.4
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]     Checking byteorder v1.2.4
[INFO] [stderr]     Checking adler32 v1.0.3
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking bitflags v1.0.3
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.5
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.9
[INFO] [stderr]     Checking inflate v0.4.3
[INFO] [stderr]     Checking gif v0.10.0
[INFO] [stderr]     Checking deflate v0.7.18
[INFO] [stderr]     Checking lock_api v0.1.3
[INFO] [stderr]     Checking smallvec v0.6.4
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking crossbeam-epoch v0.5.2
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling quote v0.6.5
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking crossbeam-deque v0.5.2
[INFO] [stderr]    Compiling syn v0.14.7
[INFO] [stderr]     Checking rayon-core v1.4.1
[INFO] [stderr]     Checking png v0.12.0
[INFO] [stderr]     Checking parking_lot v0.6.3
[INFO] [stderr]     Checking crossbeam-channel v0.2.4
[INFO] [stderr]     Checking crossbeam v0.4.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling num-derive v0.2.2
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:128:18
[INFO] [stdout]     |
[INFO] [stdout] 128 |     let output = try!(File::create(filename));
[INFO] [stdout]     |                  ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 |     try!(encoder.encode(&pixels[..],
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:128:18
[INFO] [stdout]     |
[INFO] [stdout] 128 |     let output = try!(File::create(filename));
[INFO] [stdout]     |                  ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/main.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 |     try!(encoder.encode(&pixels[..],
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.96s
[INFO] running `Command { std: "docker" "inspect" "19e3c1e28683f8aeae639af62d094774426f35cc0cea923a768cd570d3d7afdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19e3c1e28683f8aeae639af62d094774426f35cc0cea923a768cd570d3d7afdb", kill_on_drop: false }`
[INFO] [stdout] 19e3c1e28683f8aeae639af62d094774426f35cc0cea923a768cd570d3d7afdb