[INFO] cloning repository https://github.com/dpfeif/rust-cs-mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dpfeif/rust-cs-mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdpfeif%2Frust-cs-mandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdpfeif%2Frust-cs-mandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ee6503ea3990a7260ea3abbe70ed31d69f4c17ab
[INFO] checking dpfeif/rust-cs-mandelbrot against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdpfeif%2Frust-cs-mandelbrot" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dpfeif/rust-cs-mandelbrot
[INFO] finished tweaking git repo https://github.com/dpfeif/rust-cs-mandelbrot
[INFO] tweaked toml for git repo https://github.com/dpfeif/rust-cs-mandelbrot written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dpfeif/rust-cs-mandelbrot on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dpfeif/rust-cs-mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 995034946c1cbb83492cb9bc7b462c9cf4b0a4d03a86964ea5250c80e0f62c20
[INFO] running `Command { std: "docker" "start" "-a" "995034946c1cbb83492cb9bc7b462c9cf4b0a4d03a86964ea5250c80e0f62c20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "995034946c1cbb83492cb9bc7b462c9cf4b0a4d03a86964ea5250c80e0f62c20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "995034946c1cbb83492cb9bc7b462c9cf4b0a4d03a86964ea5250c80e0f62c20", kill_on_drop: false }`
[INFO] [stdout] 995034946c1cbb83492cb9bc7b462c9cf4b0a4d03a86964ea5250c80e0f62c20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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 -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa2a140040aad4502f2736779b05218cae4cfd55af592544f7ff79c1d4eea20a
[INFO] running `Command { std: "docker" "start" "-a" "aa2a140040aad4502f2736779b05218cae4cfd55af592544f7ff79c1d4eea20a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.117
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.7
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling semver v1.0.10
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling crossbeam-queue v0.3.4
[INFO] [stderr]     Checking spin v0.9.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking weezl v0.1.5
[INFO] [stderr]     Checking deflate v1.0.0
[INFO] [stderr]     Checking deflate v0.9.1
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking lebe v0.5.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]     Checking gif v0.11.3
[INFO] [stderr]    Compiling serde_json v1.0.81
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking bytemuck v1.7.3
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking getrandom v0.2.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking png v0.17.2
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking crossbeam v0.8.1
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking nanorand v0.6.1
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking tiff v0.7.1
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking jpeg-decoder v0.2.1
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]    Compiling pin-project-internal v1.0.10
[INFO] [stderr]    Compiling clap_derive v3.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking pin-project v1.0.10
[INFO] [stderr]     Checking flume v0.10.10
[INFO] [stderr]     Checking clap v3.1.0
[INFO] [stderr]     Checking exr v1.4.1
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stderr]     Checking image v0.24.0
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | /     /// Name of the PNG file to create
[INFO] [stdout]  9 | |     #[clap(default_value = "mandel.png")]
[INFO] [stdout] 10 | |     file_name: String,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | /     /// Name of the PNG file to create
[INFO] [stdout]  9 | |     #[clap(default_value = "mandel.png")]
[INFO] [stdout] 10 | |     file_name: String,
[INFO] [stdout]    | |_____________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | /     /// Pixel size of the PNG file to create
[INFO] [stdout] 13 | |     #[clap(default_value = "1000x750")]
[INFO] [stdout] 14 | |     pixels: String,
[INFO] [stdout]    | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | /     /// Pixel size of the PNG file to create
[INFO] [stdout] 13 | |     #[clap(default_value = "1000x750")]
[INFO] [stdout] 14 | |     pixels: String,
[INFO] [stdout]    | |__________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     /// Complex point in the upper left corner of the frame
[INFO] [stdout] 17 | |     #[clap(long, short, default_value = "-1.20,0.35")]
[INFO] [stdout] 18 | |     upper_left: String,
[INFO] [stdout]    | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | /     /// Complex point in the upper left corner of the frame
[INFO] [stdout] 17 | |     #[clap(long, short, default_value = "-1.20,0.35")]
[INFO] [stdout] 18 | |     upper_left: String,
[INFO] [stdout]    | |______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     /// Complex point in the lower right corner of the frame
[INFO] [stdout] 21 | |     #[clap(long, short, default_value = "-1,0.20")]
[INFO] [stdout] 22 | |     lower_right: String,
[INFO] [stdout]    | |_______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     /// Complex point in the lower right corner of the frame
[INFO] [stdout] 21 | |     #[clap(long, short, default_value = "-1,0.20")]
[INFO] [stdout] 22 | |     lower_right: String,
[INFO] [stdout]    | |_______________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mandelbrot` (bin "mandelbrot") due to 4 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `mandelbrot` (bin "mandelbrot" test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "aa2a140040aad4502f2736779b05218cae4cfd55af592544f7ff79c1d4eea20a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa2a140040aad4502f2736779b05218cae4cfd55af592544f7ff79c1d4eea20a", kill_on_drop: false }`
[INFO] [stdout] aa2a140040aad4502f2736779b05218cae4cfd55af592544f7ff79c1d4eea20a
