[INFO] cloning repository https://github.com/leohio/fractal_art
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/leohio/fractal_art" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleohio%2Ffractal_art", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleohio%2Ffractal_art'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 55ae4e4d51922e55403c3482fd290e0838861f1e
[INFO] testing leohio/fractal_art against 1.75.0 for beta-1.76-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleohio%2Ffractal_art" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leohio/fractal_art on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/leohio/fractal_art
[INFO] finished tweaking git repo https://github.com/leohio/fractal_art
[INFO] tweaked toml for git repo https://github.com/leohio/fractal_art written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/leohio/fractal_art 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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-traits v0.2.6
[INFO] [stderr]   Downloaded rand v0.4.3
[INFO] [stderr]   Downloaded num-integer v0.1.39
[INFO] [stderr]   Downloaded libc v0.2.45
[INFO] [stderr]   Downloaded num-iter v0.1.37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 47c4b2e06e81b27a810412630fb34ad0a69f1a39f98868cc8752f162e8793217
[INFO] running `Command { std: "docker" "start" "-a" "47c4b2e06e81b27a810412630fb34ad0a69f1a39f98868cc8752f162e8793217", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "47c4b2e06e81b27a810412630fb34ad0a69f1a39f98868cc8752f162e8793217", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47c4b2e06e81b27a810412630fb34ad0a69f1a39f98868cc8752f162e8793217", kill_on_drop: false }`
[INFO] [stdout] 47c4b2e06e81b27a810412630fb34ad0a69f1a39f98868cc8752f162e8793217
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9dba8c8c129e29ab72c421bbabdf0931d7982086bba62fa9750a1d1a3dc305e9
[INFO] running `Command { std: "docker" "start" "-a" "9dba8c8c129e29ab72c421bbabdf0931d7982086bba62fa9750a1d1a3dc305e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling rand v0.4.3
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling julia1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:62:23
[INFO] [stdout]    |
[INFO] [stdout] 62 |                     if(n<=127.5) {
[INFO] [stdout]    |                       ^        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 62 -                     if(n<=127.5) {
[INFO] [stdout] 62 +                     if n<=127.5 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `frame`
[INFO] [stdout]   --> src/main.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let frame = 0;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_frame`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `n2` is never read
[INFO] [stdout]   --> src/main.rs:56:29
[INFO] [stdout]    |
[INFO] [stdout] 56 |                     let mut n2:f64 = 255.0;
[INFO] [stdout]    |                             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `n3` is never read
[INFO] [stdout]   --> src/main.rs:57:29
[INFO] [stdout]    |
[INFO] [stdout] 57 |                     let mut n3:f64 = 255.0;
[INFO] [stdout]    |                             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let mut filename = format!("output/{fr: >03}.ppm",fr= frame+1);
[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:54:25
[INFO] [stdout]    |
[INFO] [stdout] 54 |                     let mut c = Complex { re:-1.0 + 0.3*angle.sin(),im: 0.3*angle.cos()};
[INFO] [stdout]    |                         ----^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:72:21
[INFO] [stdout]    |
[INFO] [stdout] 72 |                     fout.write(s2.as_bytes());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 72 |                     let _ = fout.write(s2.as_bytes());
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |                     fout.write(b"\n");
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |                     let _ = fout.write(b"\n");
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.53s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "9dba8c8c129e29ab72c421bbabdf0931d7982086bba62fa9750a1d1a3dc305e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dba8c8c129e29ab72c421bbabdf0931d7982086bba62fa9750a1d1a3dc305e9", kill_on_drop: false }`
[INFO] [stdout] 9dba8c8c129e29ab72c421bbabdf0931d7982086bba62fa9750a1d1a3dc305e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 079a0539fef0d47b5e47e54a14e04c49b10a82920c7c6097979c066fd26e6d30
[INFO] running `Command { std: "docker" "start" "-a" "079a0539fef0d47b5e47e54a14e04c49b10a82920c7c6097979c066fd26e6d30", kill_on_drop: false }`
[INFO] [stderr]    Compiling julia1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/main.rs:62:23
[INFO] [stdout]    |
[INFO] [stdout] 62 |                     if(n<=127.5) {
[INFO] [stdout]    |                       ^        ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 62 -                     if(n<=127.5) {
[INFO] [stdout] 62 +                     if n<=127.5 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `frame`
[INFO] [stdout]   --> src/main.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let frame = 0;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_frame`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `n2` is never read
[INFO] [stdout]   --> src/main.rs:56:29
[INFO] [stdout]    |
[INFO] [stdout] 56 |                     let mut n2:f64 = 255.0;
[INFO] [stdout]    |                             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `n3` is never read
[INFO] [stdout]   --> src/main.rs:57:29
[INFO] [stdout]    |
[INFO] [stdout] 57 |                     let mut n3:f64 = 255.0;
[INFO] [stdout]    |                             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |         let mut filename = format!("output/{fr: >03}.ppm",fr= frame+1);
[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:54:25
[INFO] [stdout]    |
[INFO] [stdout] 54 |                     let mut c = Complex { re:-1.0 + 0.3*angle.sin(),im: 0.3*angle.cos()};
[INFO] [stdout]    |                         ----^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:72:21
[INFO] [stdout]    |
[INFO] [stdout] 72 |                     fout.write(s2.as_bytes());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 72 |                     let _ = fout.write(s2.as_bytes());
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:73:21
[INFO] [stdout]    |
[INFO] [stdout] 73 |                     fout.write(b"\n");
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 73 |                     let _ = fout.write(b"\n");
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.53s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "079a0539fef0d47b5e47e54a14e04c49b10a82920c7c6097979c066fd26e6d30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "079a0539fef0d47b5e47e54a14e04c49b10a82920c7c6097979c066fd26e6d30", kill_on_drop: false }`
[INFO] [stdout] 079a0539fef0d47b5e47e54a14e04c49b10a82920c7c6097979c066fd26e6d30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8e638a7e1ce7f3eca68ca84af43938a619d2411015d6f810e81b20bf2d18accb
[INFO] running `Command { std: "docker" "start" "-a" "8e638a7e1ce7f3eca68ca84af43938a619d2411015d6f810e81b20bf2d18accb", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/main.rs:62:23
[INFO] [stderr]    |
[INFO] [stderr] 62 |                     if(n<=127.5) {
[INFO] [stderr]    |                       ^        ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 62 -                     if(n<=127.5) {
[INFO] [stderr] 62 +                     if n<=127.5 {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `frame`
[INFO] [stderr]   --> src/main.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let frame = 0;
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_frame`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `n2` is never read
[INFO] [stderr]   --> src/main.rs:56:29
[INFO] [stderr]    |
[INFO] [stderr] 56 |                     let mut n2:f64 = 255.0;
[INFO] [stderr]    |                             ^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `n3` is never read
[INFO] [stderr]   --> src/main.rs:57:29
[INFO] [stderr]    |
[INFO] [stderr] 57 |                     let mut n3:f64 = 255.0;
[INFO] [stderr]    |                             ^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 39 |         let mut filename = format!("output/{fr: >03}.ppm",fr= frame+1);
[INFO] [stderr]    |             ----^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:54:25
[INFO] [stderr]    |
[INFO] [stderr] 54 |                     let mut c = Complex { re:-1.0 + 0.3*angle.sin(),im: 0.3*angle.cos()};
[INFO] [stderr]    |                         ----^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:72:21
[INFO] [stderr]    |
[INFO] [stderr] 72 |                     fout.write(s2.as_bytes());
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 72 |                     let _ = fout.write(s2.as_bytes());
[INFO] [stderr]    |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |                     fout.write(b"\n");
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 73 |                     let _ = fout.write(b"\n");
[INFO] [stderr]    |                     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `julia1` (bin "julia1" test) generated 8 warnings (run `cargo fix --bin "julia1" --tests` to apply 4 suggestions)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: rustc-serialize v0.3.24
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/julia1-2cddeb23c0db09a2)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8e638a7e1ce7f3eca68ca84af43938a619d2411015d6f810e81b20bf2d18accb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e638a7e1ce7f3eca68ca84af43938a619d2411015d6f810e81b20bf2d18accb", kill_on_drop: false }`
[INFO] [stdout] 8e638a7e1ce7f3eca68ca84af43938a619d2411015d6f810e81b20bf2d18accb
