[INFO] cloning repository https://github.com/drozdziak1/mandeldraw
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/drozdziak1/mandeldraw" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrozdziak1%2Fmandeldraw", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrozdziak1%2Fmandeldraw'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 74583f14d53a095583c5c0290e5e81699b5fd967
[INFO] checking drozdziak1/mandeldraw against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrozdziak1%2Fmandeldraw" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/drozdziak1/mandeldraw on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/drozdziak1/mandeldraw
[INFO] finished tweaking git repo https://github.com/drozdziak1/mandeldraw
[INFO] tweaked toml for git repo https://github.com/drozdziak1/mandeldraw written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/drozdziak1/mandeldraw already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+beta" "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] e3923e570a76e96dd03d3913723acf0766b1ed268200cda52c4a5732d9ef226d
[INFO] running `Command { std: "docker" "start" "-a" "e3923e570a76e96dd03d3913723acf0766b1ed268200cda52c4a5732d9ef226d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3923e570a76e96dd03d3913723acf0766b1ed268200cda52c4a5732d9ef226d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3923e570a76e96dd03d3913723acf0766b1ed268200cda52c4a5732d9ef226d", kill_on_drop: false }`
[INFO] [stdout] e3923e570a76e96dd03d3913723acf0766b1ed268200cda52c4a5732d9ef226d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] 42dbb91a0c71d2816fa0856f31e98218ec33a02ac43eb98ba2e4ee5bb5f9cfac
[INFO] running `Command { std: "docker" "start" "-a" "42dbb91a0c71d2816fa0856f31e98218ec33a02ac43eb98ba2e4ee5bb5f9cfac", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.2.0
[INFO] [stderr]     Checking lazy_static v1.0.0
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking byteorder v1.2.1
[INFO] [stderr]     Checking adler32 v1.0.2
[INFO] [stderr]     Checking either v1.4.0
[INFO] [stderr]     Checking bitflags v1.0.1
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking utf8-ranges v1.0.0
[INFO] [stderr]     Checking color_quant v1.0.0
[INFO] [stderr]     Checking regex-syntax v0.4.2
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking serde v1.0.27
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking inflate v0.3.4
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking gif v0.9.2
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking deflate v0.7.17
[INFO] [stderr]     Checking crossbeam-epoch v0.3.0
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking num-complex v0.1.42
[INFO] [stderr]     Checking enum_primitive v0.1.1
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking num-rational v0.1.42
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]     Checking png v0.11.0
[INFO] [stderr]     Checking regex v0.2.6
[INFO] [stderr]     Checking rayon v1.0.0
[INFO] [stderr]    Compiling serde_derive_internals v0.19.0
[INFO] [stderr]    Compiling serde_derive v1.0.27
[INFO] [stderr]     Checking jpeg-decoder v0.1.14
[INFO] [stderr]     Checking image v0.18.0
[INFO] [stderr]     Checking docopt v0.8.3
[INFO] [stderr]     Checking mandeldraw v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:125:13
[INFO] [stdout]     |
[INFO] [stdout] 125 |         let mut normalized = (pixel.data[0] - *min) as f64 / (*max - *min) as f64 * MAX_LUMA as f64;
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:125:13
[INFO] [stdout]     |
[INFO] [stdout] 125 |         let mut normalized = (pixel.data[0] - *min) as f64 / (*max - *min) as f64 * MAX_LUMA as f64;
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.34s
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "42dbb91a0c71d2816fa0856f31e98218ec33a02ac43eb98ba2e4ee5bb5f9cfac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42dbb91a0c71d2816fa0856f31e98218ec33a02ac43eb98ba2e4ee5bb5f9cfac", kill_on_drop: false }`
[INFO] [stdout] 42dbb91a0c71d2816fa0856f31e98218ec33a02ac43eb98ba2e4ee5bb5f9cfac